/* ===========================
   PicForge AI - Main Styles
   Modern design system with cyberpunk aesthetics
   =========================== */

/* CSS Variables */
:root {
    /* Colors - Purple/Blue Theme */
    --primary: #8B5CF6;
    --primary-dark: #7C3AED;
    --primary-light: #A78BFA;
    --secondary: #3B82F6;
    --accent: #EC4899;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;

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

    /* Background */
    --bg-primary: #0F0F1E;
    --bg-secondary: #1A1A2E;
    --bg-tertiary: #252545;

    /* Text */
    --text-primary: #FFFFFF;
    --text-secondary: #B4B4C8;
    --text-tertiary: #9090A8;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    --gradient-glow: radial-gradient(circle at center, rgba(139, 92, 246, 0.3) 0%, transparent 70%);

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

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.5);

    /* Animations */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
*,
*::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);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

body.menu-open {
    overflow: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1.125rem;
}

p {
    margin-bottom: var(--spacing-md);
}

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

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(15, 15, 30, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background-color: rgba(15, 15, 30, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    height: 100%;
}

.logo-img {
    height: 28px;
    max-width: 150px;
    width: auto;
    object-fit: contain;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 8px var(--primary));
}

.nav-links {
    display: none;
    gap: var(--spacing-xl);
}

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

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

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

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

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

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

/* Mobile Menu */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-secondary);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

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

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

.mobile-menu a {
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 500;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu a:hover {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--text-primary);
}

.mobile-menu hr {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: var(--spacing-md) 0;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 var(--spacing-3xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    bottom: -250px;
    right: -250px;
    animation-delay: 10s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 5s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    max-width: 600px;
    margin: 0 auto;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Section Styles */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
}

/* Features Section */
.features {
    background: linear-gradient(180deg,
            var(--bg-primary) 0%,
            var(--bg-secondary) 50%,
            var(--bg-primary) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.feature-icon {
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works */
.how-it-works {
    background: var(--bg-secondary);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-glow);
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-secondary);
}

.step-connector {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg,
            var(--primary) 0%,
            var(--accent) 100%);
    display: none;
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: 1fr auto 1fr auto 1fr;
    }

    .step-connector {
        display: block;
        width: 60px;
    }
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.pricing-featured {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.1);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-plan {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.pricing-price {
    margin-bottom: var(--spacing-xl);
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    color: var(--text-tertiary);
    font-size: 1.125rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* CTA Section */
.cta {
    background: var(--gradient-primary);
    padding: var(--spacing-3xl) 0;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    max-width: 350px;
}

.footer-description {
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

/* Auth Page Background */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
    position: relative;
}

.auth-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* App Page Layout */
.app-page {
    background: var(--bg-primary);
    min-height: 100vh;
    padding-top: 70px;
}

.app-navbar {
    background-color: var(--bg-secondary);
}

/* User Menu Dropdown */
.user-menu {
    position: absolute;
    top: 70px;
    right: var(--spacing-lg);
    width: 280px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    animation: slideDown var(--transition-fast);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-menu-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.user-email {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.user-menu-items {
    padding: var(--spacing-sm);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    width: 100%;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 0.875rem;
}

.user-menu-item:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--text-primary);
}

.user-menu-items hr {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: var(--spacing-sm) 0;
}