/*
 * ============================================
 * AI Portfolio Builder - Main Stylesheet
 * Design System + Global Styles
 * ============================================
 */

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

/* ─── CSS Variables (Design Tokens) ─── */
:root {
    /* Colors */
    --primary: #6C63FF;
    --primary-dark: #5A52D5;
    --primary-light: #8B83FF;
    --primary-glow: rgba(108, 99, 255, 0.3);

    --secondary: #FF6B9D;
    --secondary-dark: #E55A8A;

    --accent: #00D4AA;
    --accent-dark: #00B894;

    --bg-dark: #0B0E17;
    --bg-card: #12162B;
    --bg-card-hover: #1A1F3A;
    --bg-input: #181D35;
    --bg-section: #0F1221;

    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --text-muted: #636E80;

    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(108, 99, 255, 0.4);

    --success: #48BB78;
    --warning: #ECC94B;
    --danger: #FC5185;

    --gradient-primary: linear-gradient(135deg, #6C63FF 0%, #FF6B9D 100%);
    --gradient-dark: linear-gradient(135deg, #0B0E17 0%, #1A1F3A 100%);
    --gradient-card: linear-gradient(145deg, rgba(26,31,58,0.8) 0%, rgba(18,22,43,0.6) 100%);
    --gradient-accent: linear-gradient(135deg, #00D4AA 0%, #6C63FF 100%);

    /* Typography */
    --font-primary: 'Inter', 'Cairo', sans-serif;
    --font-display: 'Outfit', 'Cairo', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--primary-glow);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

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

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.3;
}

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

/* ─── Container ─── */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left var(--transition-slow);
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-outline {
    border: 2px solid var(--border-hover);
    color: var(--primary-light);
}

.btn-outline:hover {
    background: rgba(108, 99, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-success {
    background: var(--accent);
    color: var(--bg-dark);
    font-weight: 700;
}

.btn-success:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

/* ─── Form Elements ─── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.85rem 1.15rem;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    background: var(--bg-card);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

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

/* ─── Cards ─── */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

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

/* ─── Badge / Tag ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.85rem;
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(108, 99, 255, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(108, 99, 255, 0.25);
}

/* ─── Flash Messages ─── */
.flash {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    animation: slideDown 0.4s ease;
}

.flash-success { background: rgba(72, 187, 120, 0.15); border: 1px solid var(--success); color: var(--success); }
.flash-warning { background: rgba(236, 201, 75, 0.15); border: 1px solid var(--warning); color: var(--warning); }
.flash-danger  { background: rgba(252, 81, 133, 0.15); border: 1px solid var(--danger); color: var(--danger); }

/* ─── Section Styles ─── */
.section {
    padding: var(--space-4xl) 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

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

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

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

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

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px var(--primary-glow); }
    50% { box-shadow: 0 0 40px var(--primary-glow), 0 0 60px rgba(108, 99, 255, 0.1); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.animate-fadeInUp { animation: fadeInUp 0.6s ease both; }
.animate-fadeIn   { animation: fadeIn 0.5s ease both; }
.animate-float    { animation: float 3s ease-in-out infinite; }

/* delay utilities */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ─── Navbar ─── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(11, 14, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.7rem 0;
}

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

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
}

.navbar-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

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

.navbar-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-fast);
}

.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

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

.navbar-links a:hover::after {
    width: 100%;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Mobile menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* ─── Hero Section ─── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.15) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3xl);
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 1rem;
    background: rgba(108, 99, 255, 0.1);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease both;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.15s both;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    animation: fadeInUp 0.6s ease 0.45s both;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    animation: fadeIn 1s ease 0.6s both;
}

.hero-mockup {
    width: 480px;
    height: 340px;
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: float 4s ease-in-out infinite;
}

.mockup-header {
    display: flex;
    gap: 6px;
    margin-bottom: var(--space-md);
}

.mockup-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.mockup-dot:nth-child(1) { background: #FC5185; }
.mockup-dot:nth-child(2) { background: #ECC94B; }
.mockup-dot:nth-child(3) { background: #48BB78; }

.mockup-body {
    display: flex;
    gap: var(--space-md);
    height: calc(100% - 30px);
}

.mockup-sidebar {
    width: 30%;
    background: rgba(108, 99, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.mockup-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
}

.mockup-line {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
}

.mockup-line.short { width: 60%; }

.mockup-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mockup-card {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ─── Features Section ─── */
.features {
    background: var(--bg-section);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.feature-card {
    text-align: center;
    padding: var(--space-2xl);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--space-lg);
    background: rgba(108, 99, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ─── How It Works ─── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    position: relative;
}

.steps-grid::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
    z-index: 0;
}

.step-card {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 800;
    font-family: var(--font-display);
    box-shadow: var(--shadow-glow);
    border: 3px solid var(--bg-dark);
}

.step-card h3 {
    font-size: 1.05rem;
    margin-bottom: var(--space-sm);
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ─── CTA Section ─── */
.cta-section {
    text-align: center;
    position: relative;
}

.cta-box {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-4xl) var(--space-3xl);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, var(--primary-glow) 0%, transparent 50%);
    opacity: 0.5;
}

.cta-box h2 {
    font-size: 2.2rem;
    margin-bottom: var(--space-md);
    position: relative;
}

.cta-box p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--space-2xl);
    position: relative;
}

.cta-box .btn {
    position: relative;
}

/* ─── Footer ─── */
.footer {
    background: var(--bg-section);
    border-top: 1px solid var(--border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: var(--space-md);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.8rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid::before { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .navbar-links { display: none; }
    .menu-toggle { display: flex; }

    .navbar-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(11, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--space-xl);
        border-bottom: 1px solid var(--border);
        gap: var(--space-md);
    }

    .hero .container { flex-direction: column; text-align: center; }
    .hero-title { font-size: 2.2rem; }
    .hero-buttons { justify-content: center; flex-wrap: wrap; }
    .hero-visual { display: none; }

    .features-grid { grid-template-columns: 1fr; }
    .steps-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }

    .section-title { font-size: 2rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 var(--space-md); }
    .hero-title { font-size: 1.8rem; }
    .btn-lg { padding: 0.8rem 1.5rem; font-size: 0.95rem; }
}