/**
 * Aplicar Tecnologia - Design System
 * CSS moderno com Grid, Flexbox e Custom Properties
 */

/* ============================================================
   CSS RESET & BASE
   ============================================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   DESIGN TOKENS (CSS Custom Properties)
   ============================================================ */

:root {
    /* Cores Primárias */
    --primary: #1E3A5F;
    --primary-light: #2E5A8F;
    --primary-dark: #0F1F33;
    
    /* Cores Secundárias */
    --secondary: #2E7D32;
    --secondary-light: #4CAF50;
    --secondary-dark: #1B5E20;
    
    /* Cores de Ação */
    --accent: #0D6EFD;
    --accent-hover: #0B5ED7;
    
    /* Cores de Estado */
    --success: #198754;
    --warning: #FFC107;
    --error: #DC3545;
    --info: #0DCAF0;
    
    /* Neutros */
    --white: #FFFFFF;
    --gray-50: #F8F9FA;
    --gray-100: #E9ECEF;
    --gray-200: #DEE2E6;
    --gray-300: #CED4DA;
    --gray-400: #ADB5BD;
    --gray-500: #6C757D;
    --gray-600: #495057;
    --gray-700: #343A40;
    --gray-800: #212529;
    --black: #000000;
    
    /* Cores de Texto */
    --text-primary: var(--gray-800);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-500);
    --text-light: var(--white);
    
    /* Cores de Background */
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --bg-dark: var(--primary-dark);
    
    /* Tipografia */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Tamanhos de Fonte */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */
    
    /* Pesos de Fonte */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Espaçamentos */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    
    /* 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;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transições */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    
    /* Largura do Container */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1400px;
    
    /* Header Height */
    --header-height: 80px;
    --header-height-mobile: 64px;
}

/* ============================================================
   TIPOGRAFIA
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: 1.2;
    color: var(--text-primary);
    text-wrap: balance;
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
    text-wrap: pretty;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

strong, b {
    font-weight: var(--font-semibold);
}

small {
    font-size: var(--text-sm);
}

/* ============================================================
   LAYOUT & CONTAINER
   ============================================================ */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-inline: auto;
    padding-inline: var(--space-4);
}

.container-sm {
    max-width: var(--container-sm);
}

.container-md {
    max-width: var(--container-md);
}

.container-lg {
    max-width: var(--container-lg);
}

.container-2xl {
    max-width: var(--container-2xl);
}

/* Seções */
section {
    padding-block: var(--space-16);
}

.section-sm {
    padding-block: var(--space-10);
}

.section-lg {
    padding-block: var(--space-24);
}

/* ============================================================
   GRID SYSTEM
   ============================================================ */

.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1024px) {
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .sm\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
}

/* ============================================================
   FLEXBOX UTILITIES
   ============================================================ */

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1 1 0%;
}

/* ============================================================
   HEADER
   ============================================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-100);
    transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-logo img {
    height: 40px;
    width: auto;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    padding: var(--space-2) 0;
    position: relative;
}

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

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

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

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    margin-top: var(--space-2);
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.nav-dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-dropdown-item:hover {
    background-color: var(--gray-50);
    color: var(--primary);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--white);
    padding: var(--space-6);
    overflow-y: auto;
    z-index: var(--z-fixed);
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-4);
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.mobile-nav-link:hover {
    background-color: var(--gray-50);
}

@media (max-width: 1024px) {
    .header-inner {
        height: var(--header-height-mobile);
    }
    
    .header-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ============================================================
   HERO SECTION
   ============================================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background-color: var(--primary-dark);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.95) 0%, rgba(15, 31, 51, 0.9) 100%);
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--secondary-light);
    margin-bottom: var(--space-6);
    backdrop-filter: blur(8px);
}

.hero-title {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    color: var(--white);
    margin-bottom: var(--space-6);
    line-height: 1.1;
}

.hero-title span {
    color: var(--secondary-light);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--gray-300);
    margin-bottom: var(--space-8);
    max-width: 560px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.hero-stats {
    display: flex;
    gap: var(--space-10);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat {
    text-align: left;
}

.hero-stat-number {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--white);
    line-height: 1;
}

.hero-stat-label {
    font-size: var(--text-sm);
    color: var(--gray-400);
    margin-top: var(--space-2);
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding-block: calc(var(--header-height-mobile) + var(--space-12)) var(--space-12);
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-6);
    }
    
    .hero-stat {
        flex: 1 1 45%;
    }
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn-primary {
    background-color: var(--secondary);
    color: var(--white);
    border-color: var(--secondary);
}

.btn-primary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--white);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--gray-100);
    color: var(--text-primary);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-icon {
    padding: var(--space-3);
}

.btn svg {
    width: 20px;
    height: 20px;
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid var(--gray-100);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-hover:hover {
    transform: translateY(-4px);
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background-color: var(--primary);
    color: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.card-icon svg {
    width: 28px;
    height: 28px;
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.card-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--primary);
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: var(--space-3);
    color: var(--primary);
}

.card-link svg {
    width: 16px;
    height: 16px;
}

/* Solution Card */
.solution-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.solution-card .card-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */

.section-header {
    text-align: center;
    max-width: 700px;
    margin-inline: auto;
    margin-bottom: var(--space-12);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background-color: var(--gray-100);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .section-title {
        font-size: var(--text-3xl);
    }
}

/* ============================================================
   STATS / METRICS
   ============================================================ */

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.stat {
    text-align: center;
    padding: var(--space-6);
}

.stat-number {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: var(--font-medium);
}

@media (max-width: 1024px) {
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .stats {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   CLIENTS / LOGOS
   ============================================================ */

.clients {
    background-color: var(--gray-50);
}

.clients-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-10);
}

.client-logo {
    filter: grayscale(100%);
    opacity: 0.6;
    transition: filter var(--transition-base), opacity var(--transition-base);
    max-height: 48px;
    width: auto;
}

.client-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* ============================================================
   FEATURES LIST
   ============================================================ */

.features-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.feature-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--secondary);
}

.feature-text {
    font-size: var(--text-base);
    color: var(--text-secondary);
}

/* ============================================================
   CTA SECTION
   ============================================================ */

.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin-inline: auto;
}

.cta-title {
    font-size: var(--text-4xl);
    color: var(--white);
    margin-bottom: var(--space-4);
}

.cta-description {
    font-size: var(--text-lg);
    color: var(--gray-300);
    margin-bottom: var(--space-8);
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    background-color: var(--primary-dark);
    color: var(--gray-400);
    padding-top: var(--space-16);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-10);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    margin-bottom: var(--space-4);
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-description {
    font-size: var(--text-sm);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-400);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.social-link:hover {
    background-color: var(--secondary);
    color: var(--white);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-column-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-size: var(--text-sm);
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--white);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--secondary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block: var(--space-6);
    font-size: var(--text-sm);
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

.footer-legal a {
    color: var(--gray-400);
}

.footer-legal a:hover {
    color: var(--white);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-brand {
        grid-column: span 2;
        max-width: none;
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-label.required::after {
    content: ' *';
    color: var(--error);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: var(--text-base);
    color: var(--text-primary);
    background-color: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--space-10);
}

.form-error {
    font-size: var(--text-sm);
    color: var(--error);
    margin-top: var(--space-1);
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-1);
}

/* File Input */
.form-file {
    position: relative;
}

.form-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.form-file-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background-color: var(--gray-50);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.form-file-label:hover {
    border-color: var(--accent);
    background-color: rgba(13, 110, 253, 0.05);
}

.form-file-icon {
    width: 48px;
    height: 48px;
    color: var(--gray-400);
    margin-bottom: var(--space-3);
}

.form-file-text {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-align: center;
}

.form-file-text strong {
    color: var(--accent);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--accent);
}

.form-check-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ============================================================
   ALERTS & NOTIFICATIONS
   ============================================================ */

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.alert-success {
    background-color: rgba(25, 135, 84, 0.1);
    color: var(--success);
    border: 1px solid rgba(25, 135, 84, 0.2);
}

.alert-error {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--error);
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
    border: 1px solid rgba(255, 193, 7, 0.2);
}

.alert-info {
    background-color: rgba(13, 202, 240, 0.1);
    color: #055160;
    border: 1px solid rgba(13, 202, 240, 0.2);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    min-width: 300px;
    max-width: 400px;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================================
   UTILITIES
   ============================================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--white); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }

.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-white { background-color: var(--white); }
.bg-dark { background-color: var(--bg-dark); }

.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }

.overflow-hidden { overflow: hidden; }

/* Spacing utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.my-4 { margin-block: var(--space-4); }
.my-6 { margin-block: var(--space-6); }
.my-8 { margin-block: var(--space-8); }

.pt-4 { padding-top: var(--space-4); }
.pt-6 { padding-top: var(--space-6); }
.pb-4 { padding-bottom: var(--space-4); }
.pb-6 { padding-bottom: var(--space-6); }
.py-4 { padding-block: var(--space-4); }
.py-6 { padding-block: var(--space-6); }

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease;
}

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease;
}

.animate-fade-in-down {
    animation: fadeInDown 0.5s ease;
}

/* Animation on scroll (JavaScript will add .visible class) */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   LOADING STATES
   ============================================================ */

.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.btn.loading .spinner {
    width: 18px;
    height: 18px;
    border-width: 2px;
}

/* ============================================================
   RESPONSIVE UTILITIES
   ============================================================ */

@media (max-width: 1024px) {
    .lg\:hidden { display: none; }
}

@media (max-width: 768px) {
    .md\:hidden { display: none; }
    
    section {
        padding-block: var(--space-12);
    }
}

@media (max-width: 640px) {
    .sm\:hidden { display: none; }
    
    .container {
        padding-inline: var(--space-4);
    }
}

/* Show only on specific breakpoints */
.show-lg {
    display: none;
}

@media (max-width: 1024px) {
    .show-lg { display: block; }
}

.show-md {
    display: none;
}

@media (max-width: 768px) {
    .show-md { display: block; }
}