/* Core Design System & CSS Variables */
:root {
    --bg-primary: hsl(340, 25%, 4%);
    --bg-secondary: hsl(340, 20%, 6%);
    --bg-tertiary: hsl(340, 18%, 9%);
    --accent: #e91e63;
    --accent-glow: rgba(233, 30, 99, 0.4);
    --accent-hover: #e91e63;
    --text-primary: #f5f5f7;
    --text-secondary: hsl(340, 15%, 72%);
    --text-muted: hsl(340, 12%, 52%);
    --success: #00e676;
    --error: #ff1744;
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.5);
    --font-sans: 'Inter', 'Noto Sans Thai', sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background Glowing Spheres */
.bg-glow {
    position: fixed;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.12;
    pointer-events: none;
}

.bg-glow-1 {
    top: -10%;
    left: -10%;
    background: radial-gradient(circle, #e91e63 0%, rgba(255, 64, 129, 0) 70%);
}

.bg-glow-2 {
    bottom: -10%;
    right: -10%;
    background: radial-gradient(circle, #00bcd4 0%, rgba(255, 109, 0, 0) 70%);
}

.bg-glow-3 {
    top: 30%;
    left: 45%;
    background: radial-gradient(circle, #7c4dff 0%, rgba(124, 77, 255, 0) 70%);
    width: 40vw;
    height: 40vw;
    opacity: 0.06;
}

/* Layout Page Controllers */
.app-page {
    display: none;
    min-height: 100vh;
}

.app-page.active {
    display: block;
}

/* Components: Glassmorphism Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px 0 var(--glass-shadow);
}

/* Headings & Text Helpers */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.text-gradient {
    background: linear-gradient(135deg, #e91e63 0%, #00bcd4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge-premium {
    background: linear-gradient(135deg, #ffd700 0%, #ffa500 100%);
    color: #000;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #e91e63 0%, #d81b60 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 64, 129, 0.6);
    background: linear-gradient(135deg, var(--accent-hover) 0%, #e91e63 100%);
}

.btn-accent {
    background: linear-gradient(135deg, #00bcd4 0%, #e65100 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(255, 109, 0, 0.4);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 109, 0, 0.6);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-block {
    width: 100%;
}

.btn-google {
    background-color: #fff;
    color: #1f1f1f;
    border: 1px solid #dadce0;
    font-weight: 500;
}

.btn-google:hover {
    background-color: #f7f9fa;
    transform: translateY(-1px);
}

/* SECTION 1: LANDING PAGE STYLING */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 8%;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 700;
}

.logo-icon {
    color: #e91e63;
    text-shadow: 0 0 10px var(--accent-glow);
}

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

/* Hero Section */
.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 60px;
    padding: 80px 8%;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.promo-pill {
    background: rgba(255, 64, 129, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent-hover);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    align-self: flex-start;
}

.pulse-icon {
    animation: heartbeat 1.5s infinite;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-top: 10px;
}

.trust-indicators {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 10px;
}

.trust-indicators i {
    color: var(--success);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
}

.visual-card-wrapper {
    position: relative;
    width: 100%;
    max-width: 420px;
}

.preview-card {
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    transform: rotate(2deg);
    transition: var(--transition);
}

.preview-card:hover {
    transform: rotate(0deg) scale(1.02);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 12px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.dot.red { background-color: #ff5f56; }
.dot.yellow { background-color: #ffbd2e; }
.dot.green { background-color: #27c93f; }

.preview-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: 10px;
}

.preview-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.preview-field label {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 6px;
}

.mock-input {
    background-color: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.preview-field-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.preview-button {
    background: linear-gradient(135deg, #e91e63 0%, #00bcd4 100%);
    border-radius: var(--radius-sm);
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    font-weight: 500;
    font-size: 0.95rem;
    margin-top: 10px;
}

.spinner-icon {
    animation: rotate 1.2s linear infinite;
}

/* Features Grid */
.section-features {
    padding: 100px 8%;
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 64, 129, 0.3);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    background: rgba(255, 64, 129, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

/* Campaign Banner */
.campaign-banner {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    gap: 40px;
    margin: 60px auto 100px;
    padding: 50px;
    max-width: 1200px;
    background: linear-gradient(135deg, rgba(255,64,129,0.06) 0%, rgba(255,109,0,0.06) 100%);
    border-color: rgba(255, 64, 129, 0.2);
}

.badge-accent {
    background-color: rgba(255, 64, 129, 0.15);
    border: 1px solid #e91e63;
    color: #e91e63;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 16px;
}

.campaign-banner h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.campaign-banner p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.banner-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.banner-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.text-accent {
    color: #e91e63;
}

.footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 8%;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* SECTION 2 & 3: AUTHENTICATION STYLING */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 480px;
    padding: 40px;
    position: relative;
}

.promo-badge-float {
    position: absolute;
    top: -15px;
    right: 30px;
    background: linear-gradient(135deg, #e91e63 0%, #00bcd4 100%);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 6px 14px;
    border-radius: 30px;
    box-shadow: 0 4px 10px rgba(255, 64, 129, 0.4);
    animation: bounce 2s infinite;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.auth-header .logo-icon {
    font-size: 2.5rem;
}

.auth-header h2 {
    font-size: 1.8rem;
}

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

.auth-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.auth-separator {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.auth-separator::before,
.auth-separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--glass-border);
}

.auth-separator:not(:empty)::before {
    margin-right: .5em;
}

.auth-separator:not(:empty)::after {
    margin-left: .5em;
}

/* Forms styling */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-input, .form-textarea, .form-select {
    font-family: var(--font-sans);
    background-color: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    width: 100%;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-tip {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
}

.checkbox-group input {
    margin-top: 4px;
}

.checkbox-group label {
    font-size: 0.8rem;
    line-height: 1.4;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

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

.mt-2 { margin-top: 8px; }

/* SECTION 4: APP DASHBOARD / WORKSPACE */
.dashboard-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* Sidebar styling */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    padding: 24px;
}

.sidebar-header {
    margin-bottom: 30px;
}

.user-profile-badge {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e91e63 0%, #00bcd4 100%);
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-plan-badge {
    font-size: 0.75rem;
    color: #ffd700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.menu-item {
    font-family: var(--font-sans);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    text-align: left;
    transition: var(--transition);
}

.menu-item:hover, .menu-item.active {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.menu-item.active {
    border-left: 3px solid var(--accent);
    padding-left: 13px;
    background: linear-gradient(90deg, rgba(255,64,129,0.08) 0%, rgba(25,25,43,0.5) 100%);
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
}

.trial-counter {
    background-color: rgba(255, 215, 0, 0.05);
    border: 1px solid rgba(255, 215, 0, 0.1);
    border-radius: var(--radius-sm);
    padding: 10px;
}

.trial-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ffd700 0%, #ff9100 100%);
}

.btn-logout {
    font-family: var(--font-sans);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    transition: var(--transition);
    padding: 8px;
}

.btn-logout:hover {
    color: var(--error);
}

/* Dashboard Main Workspace */
.dashboard-main {
    padding: 40px;
    height: 100vh;
    overflow-y: auto;
}

.dashboard-tab {
    display: none;
}

.dashboard-tab.active {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.tab-header h1 {
    font-size: 1.8rem;
    margin-bottom: 6px;
}

.tab-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.api-status-badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.api-status-badge:hover {
    background: rgba(255, 64, 129, 0.1);
    border-color: var(--accent);
}

/* Tab 1: AI eBook Writer layout */
.ebook-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    height: calc(100vh - 200px);
    min-height: 520px;
}

.ebook-panel-input {
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.form-textarea {
    resize: none;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.ebook-panel-output {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.output-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.output-status {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.output-actions {
    display: flex;
    gap: 12px;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-icon:hover:not([disabled]) {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-icon[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
}

.output-content-area {
    padding: 24px;
    flex: 1;
    overflow-y: auto;
    position: relative;
    background-color: rgba(0,0,0,0.15);
}

.output-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 100%;
    color: var(--text-muted);
    gap: 16px;
}

.empty-icon {
    font-size: 3rem;
    opacity: 0.3;
}

.output-text {
    font-size: 1rem;
    color: #e2e8f0;
    white-space: pre-wrap;
    line-height: 1.7;
}

.output-text h1, .output-text h2, .output-text h3 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: #fff;
    border-bottom: 1px solid rgba(255, 64, 129, 0.1);
    padding-bottom: 6px;
}

.output-text ul, .output-text ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.output-text li {
    margin-bottom: 6px;
}

.output-text p {
    margin-bottom: 15px;
}

.output-text hr {
    border: none;
    border-top: 1px solid var(--glass-border);
    margin: 20px 0;
}

/* Generation Loader UI */
.generation-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 100%;
    gap: 20px;
}

.generation-loader h3 {
    font-size: 1.15rem;
}

.generation-loader p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.loader-ripple {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
}

.loader-ripple div {
    position: absolute;
    border: 4px solid var(--accent);
    opacity: 1;
    border-radius: 50%;
    animation: ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

.loader-ripple div:nth-child(2) {
    animation-delay: -0.5s;
}

@keyframes ripple {
    0% {
        top: 36px;
        left: 36px;
        width: 0;
        height: 0;
        opacity: 0;
    }
    4.9% {
        top: 36px;
        left: 36px;
        width: 0;
        height: 0;
        opacity: 0;
    }
    5% {
        top: 36px;
        left: 36px;
        width: 0;
        height: 0;
        opacity: 1;
    }
    100% {
        top: 0px;
        left: 0px;
        width: 72px;
        height: 72px;
        opacity: 0;
    }
}

/* TAB 2: LIBRARY BOOKSHELF */
.library-container {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.library-toolbar {
    display: flex;
    justify-content: space-between;
}

.search-box {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.search-box input {
    padding-left: 40px;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.library-card {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.library-card:hover {
    background-color: rgba(255, 64, 129, 0.05);
    border-color: var(--accent);
    transform: translateY(-4px);
}

.lib-card-body h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lib-card-body p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.lib-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.lib-card-badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    color: var(--accent-hover);
}

.btn-card-delete {
    position: absolute;
    top: 10px;
    right: 10px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    z-index: 2;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.btn-card-delete:hover {
    color: var(--error);
    background-color: rgba(255, 23, 68, 0.1);
}

.library-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px;
    color: var(--text-muted);
    gap: 16px;
}

/* TAB 3: AFFILIATE DEALS STYLING */
.affiliate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.affiliate-card {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.affiliate-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(255, 64, 129, 0.15);
}

.aff-badge-discount {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #00e676 0%, #e91e63 100%);
    color: #000;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
}

.aff-header {
    display: flex;
    align-items: center;
    gap: 14px;
}

.aff-icon {
    font-size: 1.8rem;
    color: var(--accent-hover);
}

.aff-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.aff-cta-btn {
    margin-top: 10px;
}

/* TAB 4: BILLING & SAAS STYLING */
.billing-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.billing-plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.plan-card {
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
}

.plan-price {
    font-size: 2.2rem;
    font-weight: 700;
    color: #fff;
}

.price-period {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.plan-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.plan-divider {
    border: none;
    border-top: 1px solid var(--glass-border);
}

.plan-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.text-error { color: var(--error); }

.plan-premium-highlight {
    border: 2px solid var(--accent);
    background: linear-gradient(185deg, rgba(255, 64, 129, 0.05) 0%, rgba(0, 0, 0, 0.2) 100%);
    box-shadow: 0 10px 40px rgba(255, 64, 129, 0.2);
}

.plan-badge-popular {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #ffd700 0%, #ff9100 100%);
    color: #000;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 4px 16px;
    border-radius: 20px;
    text-transform: uppercase;
    box-shadow: 0 4px 10px rgba(255, 215, 0, 0.3);
}

/* PromptPay Payment Verification UI */
.payment-form-card {
    padding: 30px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    animation: zoomIn 0.3s ease;
}

.payment-instruction {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.payment-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    align-items: center;
}

.qr-code-section {
    display: flex;
    justify-content: center;
}

.mock-qr-card {
    background: #fff;
    color: #000;
    padding: 20px;
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.qr-logo-container {
    font-weight: 700;
    color: #002244;
    font-size: 1.1rem;
    border-bottom: 2px solid #002244;
    width: 100%;
    text-align: center;
    padding-bottom: 4px;
}

.qr-mock-image {
    width: 160px;
    height: 160px;
    border: 2px solid #002244;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-icon {
    font-size: 6rem;
    color: #002244;
}

.qr-amount {
    font-weight: 700;
    font-size: 0.95rem;
    color: #333;
}

.payment-details-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* TAB 5: ACCOUNT & SETTINGS STYLING */
.account-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.account-card {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.account-card h2 {
    font-size: 1.4rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 12px;
}

.account-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    padding-bottom: 8px;
}

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

.detail-val {
    font-weight: 500;
}

.text-success { color: var(--success); }

.setting-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.webhook-settings-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.full-width-card {
    grid-column: span 2;
}

/* Timeline for trial subscription */
.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: relative;
    padding-left: 20px;
    margin-top: 15px;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 5px;
    bottom: 5px;
    width: 2px;
    background-color: var(--bg-tertiary);
}

.timeline-item {
    position: relative;
}

.timeline-marker {
    position: absolute;
    left: -20px;
    top: 5px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-muted);
    border: 2px solid var(--bg-primary);
}

.timeline-marker.active {
    background-color: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.timeline-marker.font-glow {
    background-color: #ffd700;
    box-shadow: 0 0 8px #ffd700;
}

.timeline-content h4 {
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.timeline-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* API KEY MODAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-card {
    width: 100%;
    max-width: 500px;
    padding: 30px;
    animation: zoomIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 12px;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* Toast System */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 10000;
}

.toast {
    background: rgba(18, 18, 30, 0.9);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateY(100px);
    opacity: 0;
    animation: toastIn 0.3s forwards;
    border-left: 4px solid var(--accent);
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--error); }
.toast.info { border-left-color: #00b0ff; }

/* Animations */
@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

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

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

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

/* Responsive CSS */
@media (max-width: 1024px) {
    .dashboard-layout {
        grid-template-columns: 240px 1fr;
    }
    .ebook-workspace {
        grid-template-columns: 1fr;
        height: auto;
    }
    .ebook-panel-output {
        height: 500px;
    }
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .hero-content h1 {
        font-size: 2.8rem;
    }
    .hero-subtitle {
        margin: 0 auto;
    }
    .hero-cta {
        justify-content: center;
    }
    .trust-indicators {
        justify-content: center;
    }
    .campaign-banner {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 30px;
    }
    .banner-list {
        align-items: center;
    }
    .account-workspace {
        grid-template-columns: 1fr;
    }
    .full-width-card {
        grid-column: span 1;
    }
    .payment-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        height: auto;
        position: static;
    }
    .navbar {
        padding: 16px 5%;
    }
    .hero-container {
        padding: 40px 5%;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .auth-card {
        padding: 24px;
    }
}