/* AI Novel Theme - Unified Design System
 * Based on projects.aitechgba.com/ainovel/
 * Colors, typography, components, animations
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Accent Colors */
    --accent: #6c63ff;
    --accent-glow: #8b7dff;
    --accent-dark: #4a3fd4;
    --gold: #f0c060;
    --gold-light: #ffe4a0;
    
    /* Background Colors */
    --dark-bg: #0b0c14;
    --dark-card: #141622;
    --dark-border: #1e2030;
    --body-bg: #1a1c28;
    
    /* Text Colors */
    --text-primary: #e8e9f0;
    --text-secondary: #9ca0b4;
    --text-muted: #6b6f82;
    
    /* Gradients */
    --gradient-1: #6c63ff;
    --gradient-2: #3b82f6;
    --gradient-3: #8b5cf6;
    --gradient-4: #06b6d4;
    --gradient-accent: linear-gradient(135deg, var(--gold) 0%, var(--gradient-3) 100%);
    --gradient-bg: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-card) 50%, #1e2130 100%);
    
    /* Semantic Colors */
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    
    /* Shadows */
    --card-hover-shadow: 0 20px 50px rgba(108, 99, 255, 0.18);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --glow-accent: 0 0 30px rgba(108, 99, 255, 0.4);
    
    /* Spacing */
    --section-padding: 80px 28px;
    --card-padding: 24px;
    --input-padding: 12px 18px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50px;
    
    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'PingFang TC', 'Microsoft JhengHei', 'Noto Sans TC', -apple-system, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   AMBIENT BACKGROUND EFFECT
   ============================================ */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: var(--dark-bg);
}

.ambient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
}

.orb-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    left: -100px;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.55) 0%, transparent 70%);
    animation: float-1 20s ease-in-out infinite;
}

.orb-2 {
    width: 500px;
    height: 500px;
    top: 30%;
    right: -150px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.45) 0%, transparent 70%);
    animation: float-2 25s ease-in-out infinite;
}

.orb-3 {
    width: 450px;
    height: 450px;
    bottom: -100px;
    left: 20%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, transparent 70%);
    animation: float-3 22s ease-in-out infinite;
}

.orb-4 {
    width: 350px;
    height: 350px;
    bottom: 20%;
    right: 10%;
    background: radial-gradient(circle, rgba(240, 192, 96, 0.25) 0%, transparent 70%);
    animation: float-4 18s ease-in-out infinite;
}

@keyframes float-1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, 30px) scale(1.05); }
    66% { transform: translate(-30px, 50px) scale(0.95); }
}

@keyframes float-2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-40px, 20px) scale(1.1); }
    66% { transform: translate(30px, -40px) scale(0.9); }
}

@keyframes float-3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -30px) scale(1.08); }
}

@keyframes float-4 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-20px, 40px) scale(1.15); }
}

/* Stars Effect */
.stars-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle var(--dur, 3s) ease-in-out var(--delay, 0s) infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-top: 0;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

.gradient-text {
    background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 50%, var(--gradient-4) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(11, 12, 20, 0.88);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent);
}

.nav-buttons {
    display: flex;
    gap: 12px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--dark-bg);
    box-shadow: var(--glow-accent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(108, 99, 255, 0.6);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--dark-border);
}

.btn-outline:hover {
    background: rgba(108, 99, 255, 0.15);
    border-color: var(--accent);
}

/* Hero Buttons */
.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 34px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gradient-3) 100%);
    color: var(--dark-bg);
    font-weight: 600;
    font-size: 1.1rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--glow-accent);
}

.btn-hero-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 0 50px rgba(240, 192, 96, 0.5);
}

.btn-hero-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 34px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 1.1rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    border: 1px solid var(--dark-border);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.btn-hero-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
}

/* Nav Buttons */
.btn-nav-solid {
    padding: 10px 28px;
    background: linear-gradient(135deg, var(--accent), var(--gradient-3));
    color: white;
    border-radius: var(--radius-full);
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-nav-solid:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-accent);
}

.btn-nav-outline {
    padding: 9px 22px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-nav-outline:hover {
    background: rgba(108, 99, 255, 0.15);
    border-color: var(--accent);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 28px 80px;
    position: relative;
}

.hero-content {
    max-width: 900px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    background: rgba(108, 99, 255, 0.15);
    border: 1px solid var(--accent);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.dot-pulse {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Floating Decorations */
.floating-card-decor {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.9rem;
    animation: float-decor 6s ease-in-out infinite;
}

.card-decor-1 {
    top: 25%;
    right: 5%;
    animation-delay: 0s;
}

.card-decor-2 {
    top: 45%;
    left: 3%;
    animation-delay: 2s;
}

.card-decor-3 {
    bottom: 25%;
    right: 8%;
    animation-delay: 4s;
}

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

/* ============================================
   STATS STRIP
   ============================================ */
.stats-strip {
    background: rgba(20, 22, 34, 0.6);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--dark-border);
    border-bottom: 1px solid var(--dark-border);
    padding: 40px 0;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, var(--gradient-4) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

/* ============================================
   SECTION STYLES
   ============================================ */
.section-padding {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108, 99, 255, 0.2);
    border: 1px solid var(--accent);
    border-radius: var(--radius-full);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.feature-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    transition: all var(--transition-normal);
    height: 100%;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.icon-purple { background: rgba(108, 99, 255, 0.2); color: var(--accent); }
.icon-blue { background: rgba(59, 130, 246, 0.2); color: var(--gradient-2); }
.icon-teal { background: rgba(6, 182, 212, 0.2); color: var(--gradient-4); }
.icon-gold { background: rgba(240, 192, 96, 0.2); color: var(--gold); }

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   WORKFLOW
   ============================================ */
.workflow-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.workflow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.step-number {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-card);
    border: 2px solid var(--accent);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.workflow-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}

.workflow-label {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   FORM STYLES
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: var(--input-padding);
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-append {
    display: flex;
}

.input-group-text {
    padding: 12px 16px;
    background: var(--accent);
    border: 1px solid var(--accent);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: white;
}

/* ============================================
   CARD STYLES
   ============================================ */
.card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--accent);
    box-shadow: var(--card-hover-shadow);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--dark-border);
    background: rgba(108, 99, 255, 0.05);
}

.card-body {
    padding: var(--card-padding);
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--dark-border);
    background: rgba(20, 22, 34, 0.5);
}

/* ============================================
   AUTH FORMS (Login/Register)
   ============================================ */
.auth-card {
    max-width: 420px;
    margin: 60px auto;
    background: rgba(255, 255, 255, 0.97);
    border-radius: var(--radius-xl);
    padding: 40px 35px;
    box-shadow: var(--card-shadow);
}

.auth-card .card-header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-card .card-header h2 {
    color: var(--dark-bg);
    margin: 0;
}

.auth-card .form-label {
    color: var(--text-muted);
}

.auth-card .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   MODAL STYLES
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 12, 20, 0.9);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

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

.modal-content {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.alert-info {
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid var(--info);
    color: var(--info);
}

/* ============================================
   SIDEBAR (Member)
   ============================================ */
.sidebar {
    width: 260px;
    background: var(--dark-card);
    border-right: 1px solid var(--dark-border);
    min-height: 100vh;
    padding: 20px 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.sidebar-item:hover {
    background: var(--sidebar-hover, rgba(108, 99, 255, 0.1));
    color: var(--text-primary);
}

.sidebar-item.active {
    background: var(--sidebar-active, rgba(108, 99, 255, 0.15));
    color: var(--accent);
    border-left-color: var(--accent);
}

.sidebar-item i {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
    .floating-card-decor { display: none; }
    .workflow-container { flex-direction: column; }
    .workflow-arrow { transform: rotate(90deg); }
    .sidebar { width: 100%; min-height: auto; }
}