/* ==========================================================================
   Sidian Studio - Modern, Sustainable Design Thinking Brand Consultancy
   Visual Identity: The Infinite Canvas (Monochrome, Technical, High-Craft)
   ========================================================================== */

/* Custom Properties / Design System */
:root {
    /* Color Palette - Monochrome (Shades of Gray) */
    --bg-primary: #0b0b0b;
    --bg-secondary: #121212;
    --bg-tertiary: #181818;
    
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-muted: #666666;
    
    --border-color: #262626;
    --dot-color: rgba(255, 255, 255, 0.06);
    --line-color: rgba(255, 255, 255, 0.03);
    
    --accent-glow: rgba(255, 255, 255, 0.08);
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Typography */
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Space Mono', SFMono-Regular, Consolas, monospace;
}

/* Light Mode Override */
[data-theme="light"] {
    --bg-primary: #fcfcfc;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #ededed;
    
    --text-primary: #0f0f0f;
    --text-secondary: #4b4b4b;
    --text-muted: #8c8c8c;
    
    --border-color: #e5e5e5;
    --dot-color: rgba(0, 0, 0, 0.05);
    --line-color: rgba(0, 0, 0, 0.02);
    
    --accent-glow: rgba(0, 0, 0, 0.04);
}

/* CSS Reset & General Rules */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Infinite Canvas: Interactive Dot Grid Background */
.canvas-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
        radial-gradient(var(--dot-color) 1.5px, transparent 1.5px),
        linear-gradient(to right, var(--line-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--line-color) 1px, transparent 1px);
    background-size: 40px 40px, 200px 200px, 200px 200px;
    background-position: center center;
    pointer-events: none;
    opacity: 0.85;
}

/* Main Container & Layout */
.container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 0 4rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.5rem;
    }
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 2.5rem 0;
    background-image: linear-gradient(to bottom, var(--bg-primary) 30%, transparent);
    transition: padding 0.3s ease;
}

header.scrolled {
    padding: 1.5rem 0;
    background-color: rgba(11, 11, 11, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] header.scrolled {
    background-color: rgba(252, 252, 252, 0.85);
}

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

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.03em;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

nav {
    display: flex;
    align-items: center;
    gap: 3rem;
}

nav a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    position: relative;
    padding: 0.25rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

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

nav a:hover::after {
    width: 100%;
}

.theme-selector {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border-color);
    padding: 0.2rem;
    border-radius: 4px;
    background-color: var(--bg-secondary);
    position: relative;
    gap: 0.15rem;
}

.theme-option {
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-option span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.35rem 0.7rem;
    border-radius: 2px;
    color: var(--text-muted);
    transition: var(--transition-smooth);
    user-select: none;
}

/* Checked state - Segment highlights active choice */
.theme-option input:checked + span {
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Adjust layout on hover */
.theme-option:hover span {
    color: var(--text-primary);
}

/* Sections */
section {
    padding: 6rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--border-color);
    padding: 10rem 0 4rem 0;
}

.hero-video-banner {
    width: 100%;
    aspect-ratio: 21 / 9;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    background-color: var(--bg-secondary);
    box-shadow: 0 15px 40px var(--accent-glow);
    position: relative;
    margin-bottom: 5rem;
    transition: var(--transition-smooth);
}

@media (max-width: 1024px) {
    .hero-video-banner {
        aspect-ratio: 16 / 9;
        margin-bottom: 4rem;
    }
}

.hero-video-banner:hover {
    border-color: var(--text-primary);
    box-shadow: 0 20px 50px var(--accent-glow);
}

.hero-video-element {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: none;
    position: absolute;
    top: 0;
    left: 0;
}

.hero-content {
    max-width: 850px;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--text-muted);
    margin-bottom: 2rem;
    display: block;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 5.5rem;
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 3rem;
}

.hero-title span {
    display: block;
    color: var(--text-muted);
}

.hero-description {
    font-size: 1.5rem;
    line-height: 1.5;
    color: var(--text-secondary);
    max-width: 650px;
    margin-bottom: 4rem;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
    padding: 1rem 2rem;
    transition: var(--transition-smooth);
}

.hero-cta:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

/* Section Common Styles */
.section-header {
    display: grid;
    grid-template-columns: 1fr 2fr;
    margin-bottom: 6rem;
}

@media (max-width: 768px) {
    .section-header {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 4rem;
    }
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

/* Philosophy Section */
.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
}

@media (max-width: 768px) {
    .philosophy-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

.philosophy-text p {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.philosophy-text p:first-child {
    font-size: 1.6rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.philosophy-meta {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-left: 1px solid var(--border-color);
    padding-left: 4rem;
}

@media (max-width: 768px) {
    .philosophy-meta {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--border-color);
        padding-top: 3rem;
    }
}

.founder-info h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.founder-info span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.philosophy-quote {
    font-family: var(--font-heading);
    font-size: 2rem;
    line-height: 1.3;
    font-style: italic;
    color: var(--text-primary);
    margin: 3rem 0;
    position: relative;
}

/* Process Section */
.process-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

@media (max-width: 1024px) {
    .process-flow {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
    }
}

@media (max-width: 600px) {
    .process-flow {
        grid-template-columns: 1fr;
    }
}

.process-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 3rem 2.5rem;
    border-radius: 6px;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.process-card:hover {
    border-color: var(--text-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--accent-glow);
}

.process-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.process-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.process-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Portfolio Section */
.portfolio-grid {
    display: flex;
    flex-direction: column;
    gap: 12rem; /* Extreme minimalist whitespace */
}

.portfolio-item {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 6rem;
    align-items: flex-start;
}

@media (max-width: 1024px) {
    .portfolio-item {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* Portfolio Left Block: Metadata & Text */
.portfolio-info {
    display: flex;
    flex-direction: column;
}

.portfolio-index {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.portfolio-client {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.portfolio-deliverables {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.deliverable-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    background-color: var(--bg-secondary);
}

.portfolio-description {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* Interactive Project Tabs */
.project-tabs-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.75rem 0;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

.tab-btn.active {
    color: var(--text-primary);
}

.tab-btn.active::after {
    width: 100%;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-content-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.tab-content-text strong {
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1rem;
    display: block;
    margin-bottom: 0.5rem;
}

.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 1.5rem;
}

.metric-card {
    display: flex;
    flex-direction: column;
}

.metric-val {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
}

.metric-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Portfolio Right Block: Custom Visuals */
.portfolio-visual {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    aspect-ratio: 1.4 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.portfolio-visual:hover {
    border-color: var(--text-primary);
    box-shadow: 0 15px 40px var(--accent-glow);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 1.5rem;
    transition: var(--transition-smooth);
}

.portfolio-visual:hover .portfolio-img {
    transform: scale(1.02);
}

/* Inline Branding SVGs */
.visual-svg {
    width: 80%;
    height: 80%;
    color: var(--text-primary);
    stroke-width: 0.75;
}

/* Sub-page Case Study Links */
.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-decoration: none;
    color: var(--text-primary);
    margin-top: 2rem;
    transition: var(--transition-smooth);
    width: fit-content;
}

.project-link:hover {
    transform: translateX(5px);
    opacity: 0.8;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 6rem;
}

@media (max-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.contact-text p {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.contact-link {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
    width: fit-content;
}

.contact-link:hover {
    opacity: 0.7;
    transform: translateX(5px);
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
}

.form-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.form-input {
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    padding: 0.75rem 0;
    outline: none;
    transition: var(--transition-smooth);
}

.form-input:focus {
    border-bottom-color: var(--text-primary);
}

textarea.form-input {
    min-height: 120px;
    resize: vertical;
}

.submit-btn {
    background: none;
    border: 1px solid var(--text-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 1.25rem 2rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    align-self: flex-start;
}

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

.form-status {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    display: none;
    animation: fadeIn 0.3s ease;
}

.form-status.success {
    display: block;
    color: #4ade80;
}

.form-status.error {
    display: block;
    color: #f87171;
}

/* Footer Section */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 768px) {
    .footer-container {
        flex-direction: column;
        gap: 2rem;
        align-items: flex-start;
    }
}

.footer-info {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-badges {
    display: flex;
    gap: 1.5rem;
}

.footer-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
}

/* Page Scroll Indicator */
.scroll-indicator {
    position: fixed;
    bottom: 2.5rem;
    right: 4rem;
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    transform: rotate(90deg);
    transform-origin: bottom right;
    pointer-events: none;
}

@media (max-width: 768px) {
    .scroll-indicator {
        display: none;
    }
}

/* ==========================================================================
   Sub-Page Case Study Layouts
   ========================================================================== */

/* Sub-page Navigation & Hero */
.project-header-container {
    padding-top: 10rem;
    padding-bottom: 4rem;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 4rem;
    transition: var(--transition-smooth);
}

.back-btn:hover {
    color: var(--text-primary);
    transform: translateX(-5px);
}

.project-meta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 3rem 0;
    margin: 4rem 0;
}

@media (max-width: 768px) {
    .project-meta-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .project-meta-grid {
        grid-template-columns: 1fr;
    }
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meta-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.meta-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Sub-page Detailed Phase Sections */
.project-phase-grid {
    display: flex;
    flex-direction: column;
    gap: 8rem;
    margin-bottom: 8rem;
}

.phase-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 6rem;
    align-items: center;
}

@media (max-width: 1024px) {
    .phase-row {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

.phase-text-content {
    display: flex;
    flex-direction: column;
}

.phase-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.phase-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.phase-description {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.phase-description p {
    margin-bottom: 1.5rem;
}

.phase-description ul {
    list-style: none;
    margin-top: 1rem;
}

.phase-description li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.phase-description li::before {
    content: '//';
    position: absolute;
    left: 0;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.phase-visual-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.phase-visual-card:hover {
    border-color: var(--text-primary);
    box-shadow: 0 15px 45px var(--accent-glow);
}

.phase-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.phase-visual-card:hover .phase-img {
    transform: scale(1.01);
}

/* Portfolio Visual Link & Click Animation */
.portfolio-visual-link {
    display: block;
    text-decoration: none;
    outline: none;
}

.portfolio-visual.clicked-transition {
    transform: scale(0.96) !important;
    filter: brightness(0.6);
    opacity: 0;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.5s ease, filter 0.5s ease !important;
}

/* Frequently Queried Insights (FAQ Section) */
#faq {
    padding: 12rem 0;
    border-top: 1px solid var(--border-color);
}

.faq-container {
    max-width: 1000px;
    margin: 4rem 0 0 0;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 2.2rem 0;
    transition: var(--transition-smooth);
}

.faq-item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    padding: 1rem 0;
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    outline: none;
}

.faq-question h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.2rem;
    font-weight: 500;
    margin: 0;
    transition: var(--transition-smooth);
}

.faq-icon {
    font-family: 'Space Mono', monospace;
    font-size: 2.4rem;
    font-weight: 300;
    color: var(--text-muted);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), color 0.5s ease;
}

.faq-question:hover h3 {
    color: var(--text-primary);
    transform: translateX(10px);
}

.faq-question:hover .faq-icon {
    color: var(--text-primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1), padding 0.5s ease;
    padding: 0;
}

.faq-answer p {
    font-family: 'Inter', sans-serif;
    font-size: 1.6rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0;
    max-width: 800px;
}

/* Expanded state managed by JS */
.faq-item.active .faq-icon {
    transform: rotate(45deg); /* plus turns to an X */
    color: var(--text-primary);
}

.faq-item.active .faq-answer {
    max-height: 250px;
    padding: 2rem 0 1rem 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #faq {
        padding: 8rem 0;
    }
    .faq-question h3 {
        font-size: 1.8rem;
    }
    .faq-icon {
        font-size: 2rem;
    }
    .faq-answer p {
        font-size: 1.5rem;
    }
}

/* Hidden Spam Honeypot (Accessible to screen readers but completely hidden visually and tab-index isolated) */
.visual-hide {
    border: 0 !important;
    clip: rect(0 0 0 0) !important;
    height: 1px !important;
    margin: -1px !important;
    overflow: hidden !important;
    padding: 0 !important;
    position: absolute !important;
    width: 1px !important;
}