/* =============================================
   InternFolio — Global Design System
   Colors: #FF1A1A (Red), #6A0DAD (Purple), #F8F9FC (Light BG)
   Typography: Inter (body), Outfit (headings)
   ============================================= */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* =============================================
   CSS Custom Properties (Design Tokens)
   ============================================= */
:root {
    /* Brand Colors */
    --red: #FF1A1A;
    --red-dark: #CC0000;
    --red-light: #FF4D4D;
    --purple: #6A0DAD;
    --purple-dark: #4A0080;
    --purple-light: #8B3DC7;
    --purple-pale: #F0E6F6;
    
    /* Neutrals */
    --bg-light: #F8F9FC;
    --bg-white: #FFFFFF;
    --dark: #1A1A2E;
    --dark-2: #16213E;
    --gray-900: #111827;
    --gray-800: #1F2937;
    --gray-700: #374151;
    --gray-600: #4B5563;
    --gray-500: #6B7280;
    --gray-400: #9CA3AF;
    --gray-300: #D1D5DB;
    --gray-200: #E5E7EB;
    --gray-100: #F3F4F6;
    --gray-50: #F9FAFB;
    
    /* Accent Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF1A1A 0%, #6A0DAD 100%);
    --gradient-red: linear-gradient(135deg, #FF1A1A 0%, #FF6B35 100%);
    --gradient-purple: linear-gradient(135deg, #6A0DAD 0%, #3B82F6 100%);
    --gradient-dark: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Outfit', 'Inter', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
    --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.15);
    --shadow-glow-red: 0 0 40px rgba(255, 26, 26, 0.3);
    --shadow-glow-purple: 0 0 40px rgba(106, 13, 173, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout */
    --container-max: 1280px;
    --container-narrow: 960px;
    --nav-height: 80px;
}

/* =============================================
   Reset & Base
   ============================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul, ol {
    list-style: none;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

/* =============================================
   Typography
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--space-4);
    color: var(--gray-600);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =============================================
   Layout
   ============================================= */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-20) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header h2 {
    margin-bottom: var(--space-4);
}

.section-header p {
    max-width: 640px;
    margin: 0 auto;
    font-size: var(--text-lg);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--purple-pale);
    color: var(--purple);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* =============================================
   Navigation
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-logo img {
    height: 42px;
    width: auto;
    object-fit: contain;
}

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

.nav-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-700);
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--purple);
}

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

.nav-cta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

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

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

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

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 12px 28px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: all var(--transition-base);
    white-space: nowrap;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-red {
    background: var(--red);
    color: white;
    box-shadow: 0 4px 14px rgba(255, 26, 26, 0.3);
}

.btn-red:hover {
    background: var(--red-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 26, 26, 0.4);
}

.btn-purple {
    background: var(--purple);
    color: white;
    box-shadow: 0 4px 14px rgba(106, 13, 173, 0.3);
}

.btn-purple:hover {
    background: var(--purple-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(106, 13, 173, 0.4);
}

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

.btn-outline:hover {
    background: var(--purple);
    color: white;
    transform: translateY(-2px);
}

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

.btn-outline-red:hover {
    background: var(--red);
    color: white;
    transform: translateY(-2px);
}

.btn-white {
    background: white;
    color: var(--dark);
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-700);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 8px 18px;
    font-size: var(--text-xs);
}

.btn-block {
    width: 100%;
}

/* =============================================
   Cards
   ============================================= */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.card-glass {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
}

/* =============================================
   Forms
   ============================================= */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--text-sm);
    color: var(--dark);
    background: var(--bg-white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(106, 13, 173, 0.1);
}

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

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

/* =============================================
   Badges & Tags
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-red {
    background: var(--danger-light);
    color: var(--red);
}

.badge-purple {
    background: var(--purple-pale);
    color: var(--purple);
}

.badge-green {
    background: var(--success-light);
    color: var(--success);
}

.badge-yellow {
    background: var(--warning-light);
    color: var(--warning);
}

.badge-blue {
    background: var(--info-light);
    color: var(--info);
}

/* =============================================
   Footer
   ============================================= */
.footer {
    background: var(--dark);
    color: white;
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer-brand p {
    color: var(--gray-400);
    font-size: var(--text-sm);
    margin-top: var(--space-4);
    line-height: 1.7;
}

.footer-brand .footer-logo img {
    height: 40px;
    filter: brightness(10);
}

.footer-heading {
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-6);
    color: white;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

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

.footer-links a:hover {
    color: white;
    padding-left: 4px;
}

.footer-social {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.footer-social a {
    display: inline-block;
    padding: 5px 14px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.08);
    color: var(--gray-400);
    font-size: var(--text-xs);
    font-weight: 600;
    transition: all var(--transition-base);
    border: 1px solid rgba(255,255,255,0.1);
}

.footer-social a:hover {
    background: var(--red);
    border-color: var(--red);
    color: white;
    transform: translateY(-1px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--gray-500);
}

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

.footer-bottom-links a {
    font-size: var(--text-sm);
    color: var(--gray-500);
}

.footer-bottom-links a:hover {
    color: white;
}

/* =============================================
   Modals
   ============================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-8);
    position: relative;
    animation: slideUp 0.3s ease;
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: var(--text-lg);
    color: var(--gray-500);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--dark);
}

/* =============================================
   Accordion
   ============================================= */
.accordion-item {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    overflow: hidden;
    transition: all var(--transition-base);
}

.accordion-item:hover {
    border-color: var(--gray-300);
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    cursor: pointer;
    font-weight: 600;
    color: var(--dark);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.accordion-header:hover {
    color: var(--purple);
}

.accordion-icon {
    font-size: var(--text-lg);
    transition: transform var(--transition-base);
    color: var(--gray-400);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
    color: var(--purple);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-body {
    max-height: 1000px;
}

.accordion-content {
    padding: 0 var(--space-6) var(--space-6);
    color: var(--gray-600);
    font-size: var(--text-sm);
    line-height: 1.7;
}

/* =============================================
   Tabs
   ============================================= */
.tabs {
    display: flex;
    gap: var(--space-1);
    background: var(--gray-100);
    padding: 4px;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-8);
    width: fit-content;
}

.tab-btn {
    padding: 12px 28px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--gray-600);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.tab-btn.active {
    background: white;
    color: var(--purple);
    box-shadow: var(--shadow-sm);
}

.tab-btn:hover:not(.active) {
    color: var(--dark);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

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

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease both;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Scroll reveal (activated via JS) */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.15s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.25s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }

/* =============================================
   Toast Notifications
   ============================================= */
.toast-container {
    position: fixed;
    top: calc(var(--nav-height) + var(--space-4));
    right: var(--space-4);
    z-index: 10000;
    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-6);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--success);
    animation: slideInRight 0.3s ease, fadeOut 0.3s ease 3s forwards;
    min-width: 300px;
}

.toast-error {
    border-left-color: var(--danger);
}

.toast-warning {
    border-left-color: var(--warning);
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* =============================================
   Loading Spinner
   ============================================= */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

/* =============================================
   Utility Classes
   ============================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-red { color: var(--red); }
.text-purple { color: var(--purple); }
.text-gray { color: var(--gray-500); }
.text-white { color: white; }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.fw-800 { font-weight: 800; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.bg-white { background: white; }
.bg-light { background: var(--bg-light); }
.bg-dark { background: var(--dark); }
.bg-gradient { background: var(--gradient-primary); }

.d-flex { display: flex; }
.d-grid { display: grid; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.hidden { display: none !important; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 1024px) {
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }
    
    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }
    h3 { font-size: var(--text-xl); }
    
    .section {
        padding: var(--space-12) 0;
    }
    
    .container {
        padding: 0 var(--space-4);
    }
    
    /* Mobile Nav */
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-4);
        box-shadow: var(--shadow-xl);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-cta .btn {
        padding: 8px 16px;
        font-size: var(--text-xs);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .tabs {
        width: 100%;
    }
    
    .tab-btn {
        flex: 1;
        text-align: center;
        padding: 10px 16px;
    }
}

@media (max-width: 480px) {
    h1 { font-size: var(--text-2xl); }
    h2 { font-size: var(--text-xl); }
    
    .btn-lg {
        padding: 14px 24px;
        font-size: var(--text-sm);
    }
}