/* ================================================
   larnkham - Premium Novel Reading Platform
   Inspired by ReadAWrite
   ================================================ */

/* CSS Variables for theming */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --accent: #f59e0b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-gold: linear-gradient(135deg, #f5af19 0%, #f12711 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* Theme: Default (Light) */
.theme-default {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.95);
}

/* Theme: Sepia */
.theme-sepia {
    --bg-primary: #f5f0e6;
    --bg-secondary: #ebe4d6;
    --bg-tertiary: #ddd5c5;
    --text-primary: #3d3322;
    --text-secondary: #6b5d4a;
    --text-muted: #8b7d6a;
    --border-color: #d4c9b5;
    --card-bg: #f9f5ec;
    --header-bg: rgba(245, 240, 230, 0.95);
}

/* Theme: Night */
.theme-night {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --border-color: #2a2a4a;
    --card-bg: #1f1f3a;
    --header-bg: rgba(26, 26, 46, 0.95);
}

/* Theme: Dark */
.theme-dark {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #606060;
    --border-color: #303030;
    --card-bg: #1a1a1a;
    --header-bg: rgba(15, 15, 15, 0.95);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans Thai', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: var(--transition);
}

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

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

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

/* ================================================
   HEADER
   ================================================ */
.header {
    position: sticky;
    top: 0;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0 1rem;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    height: 90px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.75rem;
}

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

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: 0.25rem;
}

.nav-tab {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.nav-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-tab.active {
    background: var(--primary);
    color: white;
}

/* Search Box */
.search-box {
    flex: 1;
    max-width: 400px;
}

.search-box form {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid transparent;
    transition: var(--transition);
}

.search-box form:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-box input {
    flex: 1;
    padding: 0.625rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    padding: 0.625rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.search-box button:hover {
    color: var(--primary);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.coin-display {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border-radius: var(--radius-xl);
    color: #1e293b;
    font-weight: 600;
    font-size: 0.875rem;
}

.coin-icon {
    font-size: 1rem;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
    cursor: pointer;
    background: none;
    padding: 0;
    transition: var(--transition);
}

.user-avatar:hover {
    border-color: var(--primary);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 220px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 100;
}

.user-dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-header strong {
    display: block;
    color: var(--text-primary);
}

.dropdown-header small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.dropdown-menu a,
.dropdown-menu button {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    text-align: left;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.dropdown-menu a:hover,
.dropdown-menu button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.dropdown-menu hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 0.25rem 0;
}

/* Theme Toggle */
.theme-toggle {
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
}

.theme-default .moon-icon,
.theme-sepia .moon-icon {
    display: none;
}

.theme-night .sun-icon,
.theme-dark .sun-icon {
    display: none;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    padding: 0.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 90px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    transition: var(--transition);
    z-index: 999;
}

.mobile-nav.open {
    transform: translateY(0);
}

.mobile-nav-content {
    padding: 1rem;
}

.mobile-nav-link {
    display: block;
    padding: 0.75rem 0;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

/* ================================================
   BUTTONS
   ================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
    color: white;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

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

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

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

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* ================================================
   MAIN CONTENT
   ================================================ */
.main-content {
    min-height: calc(100vh - 64px - 300px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ================================================
   HERO SECTION
   ================================================ */
.hero {
    background: var(--gradient-primary);
    padding: 3rem 1rem;
    margin-bottom: 2rem;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
}

.hero-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* ================================================
   NOVEL CARDS
   ================================================ */
.novel-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

.novel-card-cover {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.novel-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.novel-card:hover .novel-card-cover img {
    transform: scale(1.05);
}

.novel-card-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: var(--secondary);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.novel-card-badge.hot {
    background: #ef4444;
}

.novel-card-badge.new {
    background: #22c55e;
}

.novel-card-badge.vip {
    background: var(--gradient-gold);
}

.novel-card-info {
    padding: 1rem;
}

.novel-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.novel-card-author {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.novel-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.novel-card-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ================================================
   SECTIONS
   ================================================ */
.section {
    padding: 2rem 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title-icon {
    font-size: 1.25rem;
}

.section-link {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.section-link:hover {
    text-decoration: underline;
}

/* Novel Grid */
.novel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .novel-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

@media (min-width: 1200px) {
    .novel-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* Category Pills */
.category-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.category-pill {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.category-pill:hover,
.category-pill.active {
    background: var(--primary);
    color: white;
}

/* ================================================
   ALERTS
   ================================================ */
.alert {
    padding: 1rem;
    margin: 1rem;
    border-radius: var(--radius);
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

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

.footer-bottom {
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ================================================
   AUTH PAGES
   ================================================ */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-secondary);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input.error {
    border-color: #ef4444;
}

.form-error {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox input {
    width: 1rem;
    height: 1rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 768px) {

    .nav-tabs,
    .search-box,
    .theme-toggle,
    .btn-ghost {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .mobile-nav {
        display: block;
    }

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

    .novel-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ================================================
   READING PAGE (Mobile-first)
   ================================================ */
.reading-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.reading-header {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.reading-content {
    font-size: 1.125rem;
    line-height: 1.9;
    color: var(--text-primary);
}

.reading-content p {
    margin-bottom: 1.5rem;
    text-indent: 2rem;
}

.reading-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.reading-nav .btn {
    flex: 1;
}

/* Coin Unlock Modal */
.unlock-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
}

.unlock-modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.unlock-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin: 1rem 0;
}

.unlock-price small {
    font-size: 1rem;
    color: var(--text-muted);
}