/* ==========================================================================
   Interactive Life Reset Guide - Stylesheet
   Design Language: Deep obsidian dark theme, elegant serif headings, 
   glowing crimson and indigo accents, glassmorphism card workshops.
   ========================================================================== */

/* Color Design System Variables */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    /* Theme colors */
    --bg-primary: #050811;
    --bg-secondary: #0a0f1d;
    --bg-card: rgba(16, 24, 48, 0.4);
    --border-color: rgba(255, 255, 255, 0.05);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    
    /* Glowing Accents */
    --accent-indigo: #6366f1;
    --accent-rose: #f43f5e;
    --accent-amber: #f59e0b;
    --accent-gradient-indigo: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent-gradient-rose: linear-gradient(135deg, #f43f5e 0%, #ec4899 100%);
    
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow-indigo: 0 0 20px rgba(99, 102, 241, 0.15);
    --shadow-glow-rose: 0 0 20px rgba(244, 63, 94, 0.15);
}

/* Light Theme overrides */
.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-color: rgba(0, 0, 0, 0.08);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-indigo: #4f46e5;
    --accent-rose: #e11d48;
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.05);
    --shadow-glow-indigo: 0 4px 15px rgba(79, 70, 229, 0.1);
    --shadow-glow-rose: 0 4px 15px rgba(225, 29, 72, 0.1);
}

/* General Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================================================
   Typography & Inline elements
   ========================================================================== */

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

p {
    margin-bottom: 1.4em;
    color: var(--text-secondary);
    font-size: 0.98rem;
}

.lead-en,
.lead-zh,
.lead {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 1.4em;
}

.lead-en {
    font-family: var(--font-display);
    font-weight: 400;
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

.serif-heading {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 600;
}

img.article-img {
    max-width: 100%;
    height: auto;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    margin: 2rem 0;
    display: block;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

img.article-img:hover {
    transform: translateY(-3px) scale(1.01);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-glow-indigo), 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Layout Structure
   ========================================================================== */

.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.main-header {
    height: 70px;
    padding: 0 40px;
    background-color: rgba(5, 8, 17, 0.8);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: background-color 0.3s ease;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent-gradient-indigo);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.logo-icon i {
    width: 18px;
    height: 18px;
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.5px;
    background: var(--accent-gradient-indigo);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Progress bar in header */
.progress-bar-container {
    flex: 1;
    max-width: 450px;
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    margin: 0 40px;
    overflow: hidden;
    display: none;
}

@media (min-width: 900px) {
    .progress-bar-container {
        display: block;
    }
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient-indigo);
    border-radius: 2px;
    transition: width 0.2s ease;
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.theme-toggle-btn i {
    width: 18px;
    height: 18px;
}

.hidden {
    display: none !important;
}

/* Layout Grid Container */
.main-container {
    display: flex;
    flex: 1;
    margin-top: 70px;
    max-width: 1400px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

/* Sidebar navigation */
.nav-sidebar {
    width: 280px;
    position: fixed;
    top: 70px;
    bottom: 0;
    padding: 40px 30px;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
}

.toc-nav {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.nav-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

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

.nav-item {
    margin-bottom: 2px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
    padding-left: 10px;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-num {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-muted);
}

.nav-label {
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-link.active {
    color: var(--accent-indigo);
    border-left-color: var(--accent-indigo);
    font-weight: 600;
}

.nav-link.active .nav-num {
    color: var(--accent-indigo);
}

/* Content Area */
.content-panel {
    flex: 1;
    margin-left: 280px;
    padding: 60px 80px 120px 80px;
    max-width: 900px;
}

/* Document Sections */
.doc-section {
    padding-bottom: 80px;
    margin-bottom: 60px;
    border-bottom: 1px solid var(--border-color);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.doc-section.active-section {
    opacity: 1;
}

.doc-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    background-color: var(--border-color);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-indigo);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    font-family: var(--font-display);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 30px;
    line-height: 1.25;
}

.subsection-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 2em;
    margin-bottom: 1em;
}

/* ==========================================================================
   UI Components (Cards, Forms, Quotes)
   ========================================================================== */

/* Inner Quotes inside text */
.inner-quote {
    margin: 2em 0;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.02);
    border-left: 3px solid var(--accent-indigo);
    border-radius: 0 12px 12px 0;
}

.inner-quote p {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 6px;
}

.inner-quote span {
    font-size: 0.75rem;
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--text-muted);
}

/* Bilingual Paragraph Group */
.bilingual-para {
    margin-bottom: 2em;
    padding-bottom: 1.5em;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.03);
}

.bilingual-para:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.b-en {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-style: italic;
    opacity: 0.85;
}

.b-zh {
    font-family: var(--font-sans);
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 0;
}

/* Cognitive analysis box */
.analysis-box {
    background-color: rgba(99, 102, 241, 0.03);
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: 16px;
    padding: 24px;
    margin: 2em 0;
}

.analysis-box h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--accent-indigo);
}

.analysis-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.analysis-box li {
    font-size: 0.92rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 18px;
}

.analysis-box li::before {
    content: '•';
    color: var(--accent-indigo);
    font-weight: bold;
    position: absolute;
    left: 4px;
    top: 0;
}

/* Callout card */
.callout-card {
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background-color: rgba(245, 158, 11, 0.04);
    border-left: 3px solid var(--accent-amber);
    border-radius: 4px 12px 12px 4px;
    margin: 2em 0;
}

.callout-icon {
    color: var(--accent-amber);
    display: flex;
    align-items: flex-start;
    margin-top: 2px;
}

.callout-icon i {
    width: 20px;
    height: 20px;
}

.callout-content h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.callout-content p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

/* Divider hr */
hr {
    border: none;
    height: 1px;
    background-color: var(--border-color);
    margin: 3em 0;
}

/* Interactive Worksheets */
.worksheet-card {
    margin: 2.5em 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.worksheet-card:focus-within {
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: var(--shadow-glow-indigo);
}

.worksheet-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.worksheet-icon {
    color: var(--accent-indigo);
    display: flex;
    align-items: center;
}

.worksheet-icon i {
    width: 20px;
    height: 20px;
}

.worksheet-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.worksheet-body {
    display: flex;
    flex-direction: column;
}

.input-label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.form-textarea {
    width: 100%;
    min-height: 120px;
    padding: 16px;
    border-radius: 10px;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.92rem;
    line-height: 1.6;
    outline: none;
    resize: vertical;
    transition: all 0.2s ease;
}

.light-theme .form-textarea {
    background-color: rgba(0, 0, 0, 0.02);
}

.form-textarea:focus {
    border-color: var(--accent-indigo);
    background-color: rgba(0, 0, 0, 0.3);
}

.light-theme .form-textarea:focus {
    background-color: #ffffff;
}

.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.save-status {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.save-status.show {
    opacity: 1;
}

.save-status .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #10b981;
}

/* Steps timeline container */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: 2.5em 0;
}

.step-row {
    display: flex;
    gap: 20px;
}

.step-num-badge {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--accent-indigo);
    flex-shrink: 0;
}

.step-row-content h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.step-row-content p {
    font-size: 0.88rem;
    margin-bottom: 0;
}

/* Inline Group habits inputs */
.inline-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-label-sm {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s ease;
}

.light-theme .form-input {
    background-color: rgba(0, 0, 0, 0.02);
}

.form-input:focus {
    border-color: var(--accent-indigo);
    background-color: rgba(0, 0, 0, 0.3);
}

.light-theme .form-input:focus {
    background-color: #ffffff;
}

/* Blueprint Summary Card */
.blueprint-summary-card {
    margin: 2.5em 0;
    background: linear-gradient(135deg, rgba(16, 24, 48, 0.5) 0%, rgba(31, 20, 48, 0.3) 100%);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 36px;
    position: relative;
    overflow: hidden;
}

.blueprint-summary-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
}

.card-inner {
    position: relative;
    z-index: 2;
}

.card-title-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.card-title-bar i {
    color: var(--accent-rose);
    width: 22px;
    height: 22px;
}

.summary-details {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 30px;
}

.summary-details p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.summary-details span {
    color: var(--text-primary);
}

.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 30px;
    border-radius: 12px;
    border: none;
    background: var(--accent-gradient-indigo);
    color: #ffffff;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary i {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1000px) {
    .content-panel {
        padding: 40px 40px 100px 40px;
    }
}

@media (max-width: 900px) {
    .menu-toggle-btn {
        display: flex !important;
    }

    .nav-sidebar {
        position: fixed;
        left: -280px;
        top: 70px;
        bottom: 0;
        width: 280px;
        background-color: var(--bg-secondary);
        z-index: 200;
        border-right: 1px solid var(--border-color);
        box-shadow: 10px 0 35px rgba(0, 0, 0, 0.5);
        transition: left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        padding: 30px 20px;
    }
    
    body.sidebar-open .nav-sidebar {
        left: 0;
    }
    
    .content-panel {
        margin-left: 0;
        padding: 30px 24px 80px 24px;
    }
    
    .main-header {
        padding: 0 20px;
        flex-direction: row;
        height: 70px;
        align-items: center;
        gap: 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}