/* ========================================
   DASHBOARD FINANCEIRO - LANDING PAGE
   MOBILE-FIRST APPROACH (320px+)
   ======================================== */

/* ========================================
   1. CSS VARIABLES (DESIGN TOKENS)
   ======================================== */
:root {
    /* CORES PRIMÁRIAS */
    --color-primary: #25D366;
    --color-primary-dark: #1DA851;
    --color-primary-light: #4ADE80;
    --color-secondary: #128C7E;
    --color-secondary-dark: #075E54;
    --color-accent: #34B7F1;
    --color-accent-light: #60C5F3;

    /* CORES SEMÂNTICAS */
    --color-warning: #FFA500;
    --color-success: #10B981;
    --color-danger: #EF4444;

    /* CORES NEUTRAS - DARK */
    --color-dark: #0F0F0F;
    --color-dark-bg: #1A1A1A;
    --color-dark-card: #242424;
    --color-dark-border: #333333;

    /* CORES NEUTRAS - LIGHT */
    --color-light: #FFFFFF;
    --color-light-bg: #F8F9FA;
    --color-light-card: #FFFFFF;

    /* ESCALA DE CINZAS */
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    /* TIPOGRAFIA */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-mono: 'Courier New', monospace;

    /* TAMANHOS DE FONTE (Mobile Base) */
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 2rem;       /* 32px */
    --font-size-4xl: 2.5rem;     /* 40px */
    --font-size-5xl: 3rem;       /* 48px */

    /* PESOS DE FONTE */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;

    /* LINE HEIGHTS */
    --line-height-tight: 1.2;
    --line-height-snug: 1.3;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    --line-height-loose: 1.8;

    /* ESPAÇAMENTOS (Escala 4px) */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    --spacing-4xl: 6rem;      /* 96px */

    /* PADDING DE SECTIONS (Mobile First) */
    --section-padding-mobile: 40px;
    --section-padding-tablet: 60px;
    --section-padding-desktop: 80px;

    /* CONTAINER */
    --container-padding-mobile: 16px;
    --container-padding-tablet: 20px;
    --container-padding-desktop: 32px;
    --container-max: 1200px;

    /* TRANSIÇÕES */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

    /* SOMBRAS */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(37, 211, 102, 0.3);

    /* BORDER RADIUS */
    --radius-sm: 0.25rem;     /* 4px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-2xl: 1.5rem;     /* 24px */
    --radius-full: 9999px;
}

/* ========================================
   2. RESET & BASE STYLES
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px; /* Base para rem */
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-800);
    background-color: var(--color-light);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* SELEÇÃO DE TEXTO */
::selection {
    background-color: var(--color-primary);
    color: var(--color-light);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-light);
}

/* SCROLLBAR CUSTOMIZADA (Mobile-friendly) */
::-webkit-scrollbar {
    width: 8px; /* Mais fino no mobile */
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* ========================================
   3. LAYOUT - CONTAINER (MOBILE FIRST)
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding-mobile); /* 16px mobile */
}

/* Tablet (768px+) */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--container-padding-tablet); /* 20px tablet */
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--container-padding-desktop); /* 32px desktop */
    }
}

/* ========================================
   4. SECTIONS (MOBILE FIRST)
   ======================================== */
.section {
    padding: var(--section-padding-mobile) 0; /* 40px mobile */
    position: relative;
    overflow: hidden;
}

/* Tablet (768px+) */
@media (min-width: 768px) {
    .section {
        padding: var(--section-padding-tablet) 0; /* 60px tablet */
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .section {
        padding: var(--section-padding-desktop) 0; /* 80px desktop */
    }
}

/* SECTION HEADER (MOBILE FIRST) */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl); /* 48px mobile */
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@media (min-width: 768px) {
    .section-header {
        margin-bottom: var(--spacing-3xl); /* 64px desktop */
    }
}

/* SECTION SUBTITLE (Badge) */
.section-subtitle {
    display: inline-block;
    font-size: var(--font-size-xs); /* 12px mobile */
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md); /* 8px 16px */
    border-radius: var(--radius-full);
    position: relative;
}

@media (min-width: 768px) {
    .section-subtitle {
        font-size: var(--font-size-sm); /* 14px tablet+ */
        letter-spacing: 2px;
        padding: var(--spacing-sm) var(--spacing-lg);
    }
}

/* SECTION TITLE (TIPOGRAFIA FLUIDA) */
.section-title {
    /* Mobile: 2rem (32px) → Desktop: 2.75rem (44px) */
    font-size: 2rem; /* Fallback IE11 */
    font-size: clamp(2rem, 4vw + 1rem, 2.75rem); /* Modernos */
    font-weight: var(--font-weight-extrabold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* SECTION DESCRIPTION */
.section-description {
    font-size: var(--font-size-base); /* 16px mobile */
    max-width: 700px;
    margin: 0 auto;
    line-height: var(--line-height-loose);
    color: var(--color-gray-700);
    padding: 0 var(--spacing-md); /* Padding lateral no mobile */
}

@media (min-width: 768px) {
    .section-description {
        font-size: var(--font-size-lg); /* 18px tablet+ */
        padding: 0; /* Remove padding lateral */
    }
}

/* BACKGROUNDS DE SEÇÕES */
.bg-dark {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-bg) 100%);
    color: var(--color-gray-200);
}

.bg-dark .section-subtitle {
    background: rgba(37, 211, 102, 0.1);
    color: var(--color-primary-light);
}

.bg-dark .section-title {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-dark .section-description {
    color: var(--color-gray-300);
}

.bg-light {
    background: var(--color-light-bg);
    color: var(--color-gray-800);
}

.bg-light .section-subtitle {
    background: rgba(37, 211, 102, 0.1);
    color: var(--color-primary-dark);
}

.section-subtitle-green {
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.15), rgba(18, 140, 126, 0.15)) !important;
    color: var(--color-primary) !important;
    border: 2px solid rgba(37, 211, 102, 0.3);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.15);
}

.bg-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-light);
    position: relative;
}

.bg-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
    pointer-events: none;
}

.bg-gradient .section-subtitle {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-light);
}

.bg-gradient .section-title {
    color: var(--color-light);
    background: none;
    -webkit-text-fill-color: var(--color-light);
}

.bg-gradient .section-description {
    color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   5. HEADER / NAVIGATION (MOBILE FIRST)
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    /* Fallback para navegadores antigos */
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

/* Vendor prefixes + feature query para backdrop-filter */
@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
    .header {
        background: rgba(255, 255, 255, 0.95);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
    }
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);    /* 16px */
    padding-bottom: var(--spacing-md); /* 16px */
}

/* LOGO */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm); /* 8px mobile */
    text-decoration: none;
    font-size: var(--font-size-xl); /* 20px mobile */
    font-weight: var(--font-weight-extrabold);
    color: var(--color-dark);
    transition: transform var(--transition-fast);
}

@media (min-width: 768px) {
    .logo {
        gap: var(--spacing-md); /* 16px tablet+ */
        font-size: var(--font-size-2xl); /* 24px tablet+ */
    }
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 1.75rem; /* Mobile */
    filter: drop-shadow(0 2px 4px rgba(37, 211, 102, 0.3));
}

@media (min-width: 768px) {
    .logo-icon {
        font-size: 2rem; /* Desktop */
    }
}

/* MENU MOBILE (BASE: HAMBURGER) */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-sm);
    background: transparent;
    border: none;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-dark);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* MENU MOBILE: FULLSCREEN */
.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    /* Fallback para navegadores antigos */
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl); /* 32px */
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all var(--transition-base);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

/* Vendor prefixes + feature query para backdrop-filter */
@supports (backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px)) {
    .nav-menu {
        background: rgba(255, 255, 255, 0.95);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
    }
}

.nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray-700);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg); /* 18px mobile */
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.btn-header {
    padding: 12px 24px; /* Touch-friendly mobile */
    min-height: 48px; /* Acessibilidade mobile */
    background: var(--color-primary);
    color: var(--color-light);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-header:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* TABLET+ (768px): Menu horizontal */
@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }

    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        background: transparent;
        backdrop-filter: none;
        flex-direction: row;
        gap: var(--spacing-lg); /* 24px */
        opacity: 1;
        visibility: visible;
        transform: none;
        padding: 0;
    }

    .nav-link {
        font-size: var(--font-size-base); /* 16px desktop */
    }

    .btn-header {
        padding: 10px 24px;
        min-height: auto;
        font-size: var(--font-size-sm);
    }
}

@media (min-width: 1024px) {
    .nav-menu {
        gap: var(--spacing-xl); /* 32px desktop large */
    }
}

/* ========================================
   6. HERO SECTION (MOBILE FIRST)
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0F0F0F 0%, #1A1A1A 50%, #0F0F0F 100%);
    position: relative;
    overflow: hidden;
    padding-top: 80px; /* Header height */
    padding-bottom: var(--spacing-2xl);
}

/* Efeitos de fundo (reduzidos no mobile para performance) */
.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -30%;
    width: 80%;
    height: 100%;
    background: radial-gradient(circle, rgba(37, 211, 102, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@media (min-width: 768px) {
    .hero::before {
        top: -50%;
        right: -20%;
        height: 150%;
        background: radial-gradient(circle, rgba(37, 211, 102, 0.15) 0%, transparent 70%);
    }
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 60%;
    height: 80%;
    background: radial-gradient(circle, rgba(52, 183, 241, 0.08) 0%, transparent 70%);
    animation: float 25s ease-in-out infinite reverse;
}

@media (min-width: 768px) {
    .hero::after {
        left: -10%;
        height: 100%;
        background: radial-gradient(circle, rgba(52, 183, 241, 0.1) 0%, transparent 70%);
    }
}

/* HERO CONTENT: Mobile = 1 coluna, Desktop = 2 colunas */
.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-2xl); /* 48px */
    align-items: center;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr 1fr; /* Desktop: 2 colunas */
        gap: var(--spacing-3xl); /* 64px */
    }
}

.hero-text {
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    text-align: center; /* Centralizado no mobile */
}

@media (min-width: 768px) {
    .hero-text {
        text-align: left; /* Alinhado à esquerda no desktop */
        animation: fadeInLeft 0.8s ease 0.2s forwards;
    }
}

/* HERO TITLE: TIPOGRAFIA FLUIDA */
.hero-title {
    /* Mobile: 2rem (32px) → Desktop: 3.5rem (56px) */
    font-size: 2rem; /* Fallback IE11 */
    font-size: clamp(2rem, 5vw + 1rem, 3.5rem); /* Modernos */
    font-weight: var(--font-weight-black);
    line-height: var(--line-height-tight);
    color: var(--color-light);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* HERO DESCRIPTION */
.hero-description {
    /* Mobile: 1rem (16px) → Desktop: 1.25rem (20px) */
    font-size: 1rem; /* Fallback IE11 */
    font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem); /* Modernos */
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-xl);
    line-height: var(--line-height-loose);
    font-weight: var(--font-weight-medium);
}

/* HERO BUTTONS (MOBILE FIRST) */
.hero-buttons {
    display: flex;
    gap: var(--spacing-md); /* 16px */
    flex-wrap: wrap;
    justify-content: center; /* Centralizado no mobile */
}

@media (min-width: 768px) {
    .hero-buttons {
        justify-content: flex-start; /* Alinhado à esquerda no desktop */
    }
}

/* BOTÕES: TOUCH-FRIENDLY */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 16px 24px; /* Touch-friendly: maior */
    min-height: 48px; /* Acessibilidade: mínimo 48px */
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base); /* 16px mobile */
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    width: 100%; /* Full width no mobile */
    max-width: 280px; /* Limita largura máxima */
}

@media (min-width: 768px) {
    .btn {
        padding: 14px 32px;
        font-size: var(--font-size-lg); /* 18px desktop */
        width: auto; /* Auto width no desktop */
    }
}

/* Efeito ripple nos botões */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-light);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-light);
    border: 2px solid var(--color-light);
}

.btn-secondary:hover {
    background: var(--color-light);
    color: var(--color-dark);
    transform: translateY(-3px);
}

.btn-light {
    background: var(--color-light);
    color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.btn-light:hover {
    background: var(--color-gray-100);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* HERO IMAGE */
.hero-image {
    position: relative;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

@media (min-width: 768px) {
    .hero-image {
        animation: fadeInRight 0.8s ease 0.4s forwards;
    }
}

.hero-mockup {
    width: 100%;
    max-width: 400px; /* Menor no mobile */
    margin: 0 auto;
    position: relative;
    filter: drop-shadow(0 20px 50px rgba(0, 0, 0, 0.5));
}

@media (min-width: 768px) {
    .hero-mockup {
        max-width: 500px; /* Maior no desktop */
    }
}

.hero-mockup img {
    width: 100%;
    height: auto;
    display: block;
}

/* PHONE FRAME (WhatsApp mockup) */
.phone-frame {
    width: 100%;
    max-width: 280px; /* Menor no mobile */
    margin: 0 auto;
    background: #1A1A1A;
    border-radius: 32px; /* Ajustado para mobile */
    padding: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

@media (min-width: 768px) {
    .phone-frame {
        max-width: 320px; /* Desktop */
        border-radius: 40px;
        padding: 15px;
    }
}

.phone-screen {
    background: #E5DDD5;
    border-radius: 24px; /* Mobile */
    overflow: hidden;
    height: 500px; /* Ajustado para mobile */
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .phone-screen {
        border-radius: 30px;
        height: 600px; /* Desktop */
    }
}

.chat-header {
    background: var(--color-secondary-dark);
    padding: 12px; /* Mobile */
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .chat-header {
        padding: 15px;
        gap: 12px;
    }
}

.chat-avatar {
    width: 38px; /* Mobile */
    height: 38px;
    border-radius: 50%;
    background: var(--color-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

@media (min-width: 768px) {
    .chat-avatar {
        width: 42px;
        height: 42px;
        font-size: 24px;
    }
}

.chat-info {
    flex: 1;
}

.chat-name {
    color: var(--color-light);
    font-weight: var(--font-weight-semibold);
    font-size: 14px; /* Mobile */
    line-height: var(--line-height-tight);
}

@media (min-width: 768px) {
    .chat-name {
        font-size: 16px;
    }
}

.chat-status {
    color: rgba(255, 255, 255, 0.8);
    font-size: 12px; /* Mobile */
    line-height: var(--line-height-tight);
}

@media (min-width: 768px) {
    .chat-status {
        font-size: 13px;
    }
}

.chat-messages {
    flex: 1;
    padding: 16px 12px; /* Mobile */
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
}

@media (min-width: 768px) {
    .chat-messages {
        padding: 20px 15px;
        gap: 12px;
    }
}

.message-group {
    display: flex;
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-user {
    justify-content: flex-end;
}

.message-bot {
    justify-content: flex-start;
}

.message-bubble {
    max-width: 75%;
    padding: 8px 12px; /* Mobile */
    border-radius: 8px;
    font-size: 13px; /* Mobile */
    line-height: var(--line-height-normal);
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .message-bubble {
        padding: 10px 14px;
        font-size: 14px;
    }
}

.message-user .message-bubble {
    background: #DCF8C6;
    color: #000;
    border-bottom-right-radius: 2px;
}

.message-bot .message-bubble {
    background: var(--color-light);
    color: #000;
    border-bottom-left-radius: 2px;
}

/* FLOATING CARDS (Oculto no mobile para performance) */
.floating-card {
    display: none; /* Oculto no mobile */
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 16px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: floatCard 4s ease-in-out infinite;
}

@media (min-width: 1024px) {
    .floating-card {
        display: block; /* Visível no desktop */
        padding: 16px 20px;
    }
}

.floating-card-1 {
    top: 10%;
    right: 5%;
    animation-delay: 0s;
}

.floating-card-2 {
    top: 10%;
    left: -8%;
    animation-delay: 1s;
}

.floating-card-3 {
    bottom: 15%;
    right: 8%;
    animation-delay: 2s;
}

.floating-card-4 {
    bottom: 15%;
    left: 0%;
    animation-delay: 2.5s;
}

.floating-card-icon {
    font-size: 1.5rem; /* Mobile */
    margin-bottom: 6px;
}

@media (min-width: 1024px) {
    .floating-card-icon {
        font-size: 2rem;
        margin-bottom: 8px;
    }
}

.floating-card-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: 4px;
}

@media (min-width: 1024px) {
    .floating-card-title {
        font-size: var(--font-size-sm);
    }
}

.floating-card-text {
    font-size: 0.7rem;
    color: var(--color-gray-600);
}

@media (min-width: 1024px) {
    .floating-card-text {
        font-size: var(--font-size-xs);
    }
}

/* ========================================
   7. STATS GRID (MOBILE FIRST: 1 → 2 → 4)
   ======================================== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-xl); /* 32px */
    margin-top: var(--spacing-2xl);
}

/* Tablet (576px+): 2 colunas */
@media (min-width: 576px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg); /* 24px */
    }
}

/* Desktop (1024px+): 4 colunas */
@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xl); /* 32px */
    }
}

.stat-card {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

.stat-number {
    /* Mobile: 2.5rem → Desktop: 3rem */
    font-size: 2.5rem; /* Fallback IE11 */
    font-size: clamp(2.5rem, 4vw + 1rem, 3rem); /* Modernos */
    font-weight: var(--font-weight-black);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
}

.stat-label {
    font-size: var(--font-size-base); /* Mobile */
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
}

@media (min-width: 768px) {
    .stat-label {
        font-size: var(--font-size-lg); /* Desktop */
    }
}

/* ========================================
   8. FEATURES GRID (MOBILE: 1 → 2 → 4)
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-lg); /* 24px */
}

/* Tablet (576px+): 2 colunas */
@media (min-width: 576px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (1024px+): 4 colunas */
@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xl);
    }
}

.feature-card {
    background: var(--color-light-card);
    padding: var(--spacing-lg) var(--spacing-md); /* Mobile: 24px 16px */
    border-radius: var(--radius-xl); /* Mobile: 16px */
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    border: 1px solid var(--color-gray-200);
}

@media (min-width: 768px) {
    .feature-card {
        padding: var(--spacing-xl) var(--spacing-lg); /* Desktop: 32px 24px */
        border-radius: var(--radius-2xl); /* Desktop: 24px */
    }
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }
.feature-card:nth-child(7) { animation-delay: 0.7s; }
.feature-card:nth-child(8) { animation-delay: 0.8s; }

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.bg-dark .feature-card {
    background: var(--color-dark-card);
    border-color: var(--color-dark-border);
}

.bg-dark .feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(37, 211, 102, 0.2);
}

.feature-icon {
    width: 56px; /* Mobile */
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--color-light);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
}

@media (min-width: 768px) {
    .feature-icon {
        width: 64px; /* Desktop */
        height: 64px;
        font-size: 1.75rem;
        margin-bottom: var(--spacing-lg);
    }
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-size: var(--font-size-lg); /* Mobile: 18px */
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-snug);
}

@media (min-width: 768px) {
    .feature-title {
        font-size: var(--font-size-xl); /* Desktop: 20px */
    }
}

.bg-dark .feature-title {
    color: var(--color-light);
}

.feature-description {
    font-size: var(--font-size-sm); /* Mobile: 14px */
    color: var(--color-gray-700);
    line-height: var(--line-height-relaxed);
    font-weight: var(--font-weight-medium);
}

@media (min-width: 768px) {
    .feature-description {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

.bg-dark .feature-description {
    color: var(--color-gray-300);
}

/* ========================================
   9. BENEFITS GRID (MOBILE: 1 → 2 → 3)
   ======================================== */
.benefits-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-lg); /* 24px */
}

/* Tablet (576px+): 2 colunas */
@media (min-width: 576px) {
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (1024px+): 3 colunas */
@media (min-width: 1024px) {
    .benefits-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-xl);
    }
}

.benefit-card {
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.05), rgba(52, 183, 241, 0.05));
    padding: var(--spacing-xl) var(--spacing-lg); /* Mobile: 32px 24px */
    border-radius: var(--radius-xl);
    border: 2px solid transparent;
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@media (min-width: 768px) {
    .benefit-card {
        padding: var(--spacing-2xl) var(--spacing-xl); /* Desktop: 48px 32px */
        border-radius: var(--radius-2xl);
    }
}

.benefit-card:nth-child(1) { animation-delay: 0.1s; }
.benefit-card:nth-child(2) { animation-delay: 0.2s; }
.benefit-card:nth-child(3) { animation-delay: 0.3s; }
.benefit-card:nth-child(4) { animation-delay: 0.4s; }
.benefit-card:nth-child(5) { animation-delay: 0.5s; }
.benefit-card:nth-child(6) { animation-delay: 0.6s; }

.benefit-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.benefit-icon {
    width: 48px; /* Mobile */
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    color: var(--color-light);
    transition: transform var(--transition-base);
}

@media (min-width: 768px) {
    .benefit-icon {
        width: 56px; /* Desktop */
        height: 56px;
        font-size: 1.5rem;
        margin-bottom: var(--spacing-lg);
    }
}

.benefit-card:hover .benefit-icon {
    transform: scale(1.15) rotate(-5deg);
}

.benefit-title {
    font-size: var(--font-size-lg); /* Mobile: 18px */
    font-weight: var(--font-weight-bold);
    color: #FFFFFF;
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .benefit-title {
        font-size: var(--font-size-xl); /* Desktop: 20px */
    }
}

.benefit-description {
    font-size: var(--font-size-sm); /* Mobile: 14px */
    color: var(--color-gray-300);
    line-height: var(--line-height-loose);
    font-weight: var(--font-weight-medium);
}

@media (min-width: 768px) {
    .benefit-description {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

/* ========================================
   10. USE CASES GRID (MOBILE: 1 → 2)
   ======================================== */
.use-cases-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-lg);
}

/* Tablet (768px+): 2 colunas */
@media (min-width: 768px) {
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
}

.use-case-card {
    background: var(--color-light-card);
    padding: var(--spacing-xl) var(--spacing-lg); /* Mobile: 32px 24px */
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    border-left: 4px solid var(--color-primary);
}

@media (min-width: 768px) {
    .use-case-card {
        padding: var(--spacing-2xl) var(--spacing-xl); /* Desktop: 48px 32px */
        border-radius: var(--radius-2xl);
    }
}

.use-case-card:nth-child(1) { animation-delay: 0.1s; }
.use-case-card:nth-child(2) { animation-delay: 0.2s; }
.use-case-card:nth-child(3) { animation-delay: 0.3s; }
.use-case-card:nth-child(4) { animation-delay: 0.4s; }

.bg-dark .use-case-card {
    background: var(--color-dark-card);
    border-left-color: var(--color-accent);
}

.use-case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.use-case-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.use-case-icon {
    width: 52px; /* Mobile */
    height: 52px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-light);
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .use-case-icon {
        width: 60px; /* Desktop */
        height: 60px;
        font-size: 1.75rem;
    }
}

.use-case-title {
    font-size: var(--font-size-xl); /* Mobile: 20px */
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
}

@media (min-width: 768px) {
    .use-case-title {
        font-size: var(--font-size-2xl); /* Desktop: 24px */
    }
}

.bg-dark .use-case-title {
    color: var(--color-light);
}

.use-case-list {
    list-style: none;
}

.use-case-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm); /* Mobile: 14px */
    color: var(--color-gray-600);
    line-height: var(--line-height-relaxed);
}

@media (min-width: 768px) {
    .use-case-list li {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

.bg-dark .use-case-list li {
    color: var(--color-gray-300);
}

.use-case-list li i {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    margin-top: 2px;
    flex-shrink: 0;
}

/* ========================================
   11. DEMO SECTION (MOBILE: 1 col → 2 col)
   ======================================== */
.demo-section {
    position: relative;
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 768px) {
    .demo-content {
        grid-template-columns: 1fr 1fr; /* Desktop: 2 colunas */
        gap: var(--spacing-3xl);
    }
}

.demo-content.reverse .demo-text {
    order: 1; /* Mobile: texto primeiro */
}

.demo-content.reverse .demo-visual {
    order: 2; /* Mobile: visual depois */
}

@media (min-width: 768px) {
    .demo-content.reverse .demo-text {
        order: 2; /* Desktop: texto segundo */
    }

    .demo-content.reverse .demo-visual {
        order: 1; /* Desktop: visual primeiro */
    }
}

.demo-text {
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

@media (min-width: 768px) {
    .demo-text {
        animation: fadeInLeft 0.8s ease 0.2s forwards;
    }
}

.demo-feature {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.demo-feature-icon {
    width: 42px; /* Mobile */
    height: 42px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-light);
    font-size: 1.125rem;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .demo-feature-icon {
        width: 48px; /* Desktop */
        height: 48px;
        font-size: 1.25rem;
    }
}

.demo-feature-content h3 {
    font-size: var(--font-size-base); /* Mobile: 16px */
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: 6px;
}

@media (min-width: 768px) {
    .demo-feature-content h3 {
        font-size: var(--font-size-lg); /* Desktop: 18px */
    }
}

.demo-feature-content p {
    font-size: var(--font-size-sm); /* Mobile: 14px */
    color: var(--color-gray-600);
    line-height: var(--line-height-relaxed);
    font-weight: var(--font-weight-medium);
}

@media (min-width: 768px) {
    .demo-feature-content p {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

.bg-dark .demo-feature-content h3 {
    color: var(--color-light);
}

.bg-dark .demo-feature-content p {
    color: var(--color-gray-300);
}

.demo-visual {
    position: relative;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

@media (min-width: 768px) {
    .demo-visual {
        animation: fadeInRight 0.8s ease 0.4s forwards;
    }

    .demo-content.reverse .demo-visual {
        animation: fadeInLeft 0.8s ease 0.4s forwards;
    }
}

.dashboard-mockup {
    width: 100%;
    max-width: 100%; /* Mobile: full width */
    margin: 0 auto;
    position: relative;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.15));
}

@media (min-width: 768px) {
    .dashboard-mockup {
        max-width: 800px; /* Desktop */
        filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
    }
}

.demo-phone {
    max-width: 100%; /* Mobile: full width */
    margin: 0 auto;
    background: var(--color-dark-card);
    border-radius: 32px; /* Mobile */
    padding: 12px;
    box-shadow: var(--shadow-2xl);
    border: 6px solid var(--color-dark-border);
}

@media (min-width: 768px) {
    .demo-phone {
        max-width: 400px; /* Desktop */
        border-radius: 40px;
        padding: 16px;
        border-width: 8px;
    }
}

/* ========================================
   12. CTA (Call-to-Action) SECTION
   ======================================== */
.cta-box {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: var(--spacing-2xl) var(--spacing-lg); /* Mobile: 48px 24px */
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
}

@media (min-width: 768px) {
    .cta-box {
        padding: var(--spacing-3xl) var(--spacing-2xl); /* Desktop: 64px 48px */
        border-radius: var(--radius-2xl);
    }
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-title {
    /* Mobile: 1.75rem (28px) → Desktop: 2.5rem (40px) */
    font-size: 1.75rem; /* Fallback IE11 */
    font-size: clamp(1.75rem, 4vw + 1rem, 2.5rem); /* Modernos */
    font-weight: var(--font-weight-black);
    color: var(--color-light);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.cta-description {
    /* Mobile: 1rem (16px) → Desktop: 1.25rem (20px) */
    font-size: 1rem; /* Fallback IE11 */
    font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem); /* Modernos */
    color: var(--color-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: var(--font-weight-medium);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   13. FOOTER (MOBILE: 1 → 2 → 4)
   ======================================== */
.footer {
    background: var(--color-dark);
    color: var(--color-gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-xl); /* Mobile: 48px 0 32px */
}

@media (min-width: 768px) {
    .footer {
        padding: var(--spacing-3xl) 0 var(--spacing-xl); /* Desktop: 64px 0 32px */
    }
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 coluna */
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* Tablet (576px+): 2 colunas */
@media (min-width: 576px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* Desktop (1024px+): 4 colunas (2fr 1fr 1fr 1fr) */
@media (min-width: 1024px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--spacing-2xl);
    }
}

.footer-brand {
    max-width: 100%; /* Mobile: full width */
}

@media (min-width: 1024px) {
    .footer-brand {
        max-width: 300px; /* Desktop */
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl); /* Mobile */
    font-weight: var(--font-weight-extrabold);
    color: var(--color-light);
}

@media (min-width: 768px) {
    .footer-logo {
        font-size: var(--font-size-2xl); /* Desktop */
    }
}

.footer-description {
    font-size: var(--font-size-sm); /* Mobile: 14px */
    line-height: var(--line-height-loose);
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .footer-description {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-link {
    width: 44px; /* Touch-friendly mobile */
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-light);
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
    text-decoration: none;
}

@media (min-width: 768px) {
    .social-link {
        width: 40px; /* Desktop: menor */
        height: 40px;
    }
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

.footer-column h3 {
    font-size: var(--font-size-lg); /* Mobile: 18px */
    font-weight: var(--font-weight-bold);
    color: var(--color-light);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .footer-column h3 {
        font-size: var(--font-size-xl); /* Desktop: 20px */
    }
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--color-gray-400);
    text-decoration: none;
    font-size: var(--font-size-sm); /* Mobile: 14px */
    transition: color var(--transition-fast);
    display: inline-block;
}

@media (min-width: 768px) {
    .footer-links a {
        font-size: var(--font-size-base); /* Desktop: 16px */
    }
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-xs); /* Mobile */
    color: var(--color-gray-500);
}

@media (min-width: 768px) {
    .footer-bottom {
        font-size: var(--font-size-sm); /* Desktop */
    }
}

.developer-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
}

.developer-link:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

/* ========================================
   14. SCROLL TO TOP BUTTON (MOBILE FIRST)
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 20px; /* Mobile: mais próximo */
    right: 20px;
    width: 48px; /* Touch-friendly */
    height: 48px;
    background: var(--color-primary);
    color: var(--color-light);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

@media (min-width: 768px) {
    .scroll-to-top {
        bottom: 30px; /* Desktop: mais afastado */
        right: 30px;
        width: 50px;
        height: 50px;
    }
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   15. ANIMAÇÕES
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   16. PERFORMANCE: REDUCED MOTION
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .hero::before,
    .hero::after {
        animation: none;
    }

    .floating-card {
        animation: none;
    }
}

/* ========================================
   17. PRINT STYLES
   ======================================== */
@media print {
    .header,
    .menu-toggle,
    .scroll-to-top,
    .floating-card {
        display: none !important;
    }

    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
}