:root {
    --main-bg: #232544;
    --card-bg: #42236a;
    --accent: #bb23fe;
    --secondary-accent: #23c1ed;
    --card-radius: 24px;
    --max-card-width: 1200px;
    --primary-font: 'Segoe UI', Arial, Helvetica, sans-serif;
    --nav-height: 80px;
    --text-main: #fff;
    --text-soft: #b3b9c9;
    --gap-between: 52px;
    --footer-color: #b5b7c9;
    --table-bg: #282355;
    --row-hover: #3a3463;
    --table-radius: 14px;
    --gradient-purple: linear-gradient(135deg, #42236a 0%, #2a1a42 100%);
    --gradient-dark: linear-gradient(180deg, #352054 0%, #2a1a42 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: rgba(187, 35, 254, 0.3);
    -webkit-touch-callout: none;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
}

body {
    background: var(--main-bg);
    font-family: var(--primary-font);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Navigation Bar */
.navbar {
    width: 100%;
    height: var(--nav-height);
    background: var(--card-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4vw;
    box-sizing: border-box;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
}

.nav-box-link {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s ease;
}

.nav-box-link:hover {
    opacity: 0.8;
}

.nav-box {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.2s ease;
    padding: 0.5em 0;
}

.nav-box:hover {
    opacity: 0.8;
}

.nav-box:active {
    opacity: 0.6;
}

.nav-title {
    font-size: 1.5em;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--accent);
    margin: 0;
}

.subtitle {
    font-size: 0.9em;
    font-weight: 400;
    color: var(--text-soft);
    margin: 0;
    letter-spacing: 0.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1em;
}

.nav-link {
    padding: 0.75em 1.8em;
    background: rgba(187, 35, 254, 0.15);
    border: 1px solid rgba(187, 35, 254, 0.3);
    border-radius: 12px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 1em;
    transition: all 0.3s ease;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-link:hover {
    background: rgba(187, 35, 254, 0.3);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(187, 35, 254, 0.4);
}

.nav-link:last-child {
    background: rgba(35, 193, 237, 0.15);
    border: 1px solid rgba(35, 193, 237, 0.3);
    color: var(--secondary-accent);
}

.nav-link:last-child:hover {
    background: rgba(35, 193, 237, 0.3);
    border-color: var(--secondary-accent);
    box-shadow: 0 4px 12px rgba(35, 193, 237, 0.4);
}

.nav-link:active {
    transform: scale(0.97);
}

.nav-link:last-child:active {
    transform: scale(0.97);
}

.resource-btn, .contact-btn {
    padding: 0.6em 1.5em;
    background: rgba(187, 35, 254, 0.15);
    border: 1px solid rgba(187, 35, 254, 0.3);
    border-radius: 10px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95em;
    transition: all 0.3s ease;
}

.resource-btn:hover, .contact-btn:hover {
    background: rgba(187, 35, 254, 0.3);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(187, 35, 254, 0.4);
}

.contact-btn {
    background: rgba(35, 193, 237, 0.15);
    border: 1px solid rgba(35, 193, 237, 0.3);
    color: var(--secondary-accent);
}

.contact-btn:hover {
    background: rgba(35, 193, 237, 0.3);
    border-color: var(--secondary-accent);
    box-shadow: 0 4px 12px rgba(35, 193, 237, 0.4);
}

/* Container */
.container {
    max-width: var(--max-card-width);
    margin: 0 auto;
    padding: 0 2em;
}

/* Hero Section */
.hero {
    background: var(--gradient-purple);
    padding: 6em 2em;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(187, 35, 254, 0.1), transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(35, 193, 237, 0.2);
    color: var(--secondary-accent);
    padding: 0.6em 1.8em;
    border-radius: 30px;
    font-size: 0.85em;
    font-weight: 600;
    margin-bottom: 2em;
    border: 1px solid rgba(35, 193, 237, 0.4);
    max-width: 85%;
    line-height: 1.6;
}

.hero-title {
    font-size: 3.5em;
    font-weight: 800;
    color: var(--accent);
    margin: 0.4em 0 0.3em 0;
    letter-spacing: 2px;
    text-shadow: 0 2px 20px rgba(187, 35, 254, 0.5);
}

.hero-subtitle {
    font-size: 1.6em;
    color: #fff;
    margin: 0.6em 0 1em 0;
    font-weight: 600;
}

.hero-description {
    font-size: 1.15em;
    color: var(--text-soft);
    line-height: 1.9;
    margin: 1.8em auto 2em auto;
    max-width: 650px;
}

.hero-buttons {
    display: flex;
    gap: 1.8em;
    justify-content: center;
    margin-top: 3em;
}

.btn-primary, .btn-secondary {
    padding: 1.1em 2.8em;
    border-radius: 14px;
    font-size: 1.1em;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 15px rgba(187, 35, 254, 0.4);
}

.btn-primary:hover {
    background: #9b1fd6;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(187, 35, 254, 0.6);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(187, 35, 254, 0.5);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.btn-secondary:active {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.15);
}

/* Section Styles */
.section {
    padding: 5em 2em;
}

.section-title {
    font-size: 2.5em;
    text-align: center;
    color: var(--accent);
    margin-bottom: 1.5em;
    font-weight: 700;
}

/* Problem Section */
.problem-section {
    background: var(--main-bg);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2em;
    margin-top: 3em;
}

.problem-card {
    background: var(--card-bg);
    padding: 2em;
    border-radius: var(--card-radius);
    text-align: center;
    border: 2px solid rgba(187, 35, 254, 0.2);
    transition: all 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(187, 35, 254, 0.3);
}

.problem-icon {
    font-size: 3.5em;
    margin-bottom: 0.5em;
}

.problem-card h3 {
    color: var(--accent);
    font-size: 1.4em;
    margin: 0.5em 0;
}

.problem-card p {
    color: var(--text-soft);
    line-height: 1.7;
}

/* Features Section */
.features-section {
    background: var(--gradient-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2em;
    margin-top: 3em;
}

.feature-card {
    background: rgba(66, 35, 106, 0.6);
    padding: 2em;
    border-radius: 20px;
    border: 1px solid rgba(187, 35, 254, 0.2);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    background: rgba(66, 35, 106, 0.8);
    box-shadow: 0 8px 25px rgba(187, 35, 254, 0.3);
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 0.5em;
    display: block;
}

.feature-card h3 {
    color: #fff;
    font-size: 1.3em;
    margin: 0.5em 0;
}

.feature-card p {
    color: var(--text-soft);
    line-height: 1.7;
}

/* Architecture Section */
.architecture-section {
    background: var(--main-bg);
}

.architecture-content {
    max-width: 900px;
    margin: 3em auto;
}

.tech-stack {
    margin-bottom: 3em;
    text-align: center;
}

.tech-stack h3 {
    color: #fff;
    font-size: 1.5em;
    margin-bottom: 1.5em;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 1em;
    justify-content: center;
}

.tech-badge {
    background: rgba(35, 193, 237, 0.15);
    color: var(--secondary-accent);
    padding: 0.7em 1.5em;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    border: 1px solid rgba(35, 193, 237, 0.3);
    transition: all 0.2s ease;
}

.tech-badge:hover {
    background: rgba(35, 193, 237, 0.25);
    transform: scale(1.05);
}

.architecture-diagram {
    background: var(--card-bg);
    padding: 2.5em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.3);
}

.arch-layer {
    display: flex;
    gap: 1em;
    justify-content: center;
    margin: 1em 0;
}

.arch-box {
    background: rgba(187, 35, 254, 0.2);
    color: #fff;
    padding: 1.2em 2em;
    border-radius: 12px;
    font-weight: 600;
    border: 2px solid var(--accent);
    flex: 1;
    text-align: center;
    max-width: 500px;
}

.arch-box.small {
    max-width: 200px;
    padding: 1em 1.5em;
    font-size: 0.9em;
}

.arch-arrow {
    text-align: center;
    font-size: 2em;
    color: var(--accent);
    font-weight: bold;
}

/* Abstract Section */
.abstract-section {
    background: var(--gradient-dark);
}

.abstract-content {
    max-width: 1000px;
    margin: 2em auto;
    background: var(--card-bg);
    padding: 3em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.3);
    box-shadow: 0 10px 40px rgba(187, 35, 254, 0.2);
}

.abstract-content p {
    color: var(--text-soft);
    font-size: 1.15em;
    line-height: 1.7;
    margin: 1.5em 0;
    text-align: justify;
}

.abstract-content p:first-child {
    margin-top: 0;
}

.abstract-content p:last-child {
    margin-bottom: 0;
}

.abstract-content strong {
    color: #fff;
    font-weight: 700;
}

.abstract-content .highlight-tech {
    background: rgba(35, 193, 237, 0.2);
    color: var(--secondary-accent);
    padding: 0.2em 0.6em;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

/* Results Section */
.results-section {
    background: var(--gradient-purple);
}

.results-intro {
    text-align: center;
    color: var(--text-soft);
    font-size: 1.1em;
    margin: 2em auto;
    max-width: 800px;
}

.results-table-wrapper {
    overflow-x: auto;
    margin: 2em 0;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--table-radius);
    overflow: hidden;
    border: 2px solid var(--accent);
}

.results-table th,
.results-table td {
    padding: 1.2em 1.5em;
    text-align: left;
    border-bottom: 1px solid rgba(187, 35, 254, 0.2);
}

.results-table th {
    background: rgba(187, 35, 254, 0.3);
    color: var(--accent);
    font-weight: 700;
    font-size: 1.05em;
}

.results-table tr:hover {
    background: rgba(187, 35, 254, 0.1);
}

.results-table .highlight-row {
    background: rgba(35, 193, 237, 0.1);
}

.accuracy-badge {
    padding: 0.4em 1em;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.95em;
    display: inline-block;
}

.accuracy-badge.best {
    background: rgba(35, 193, 237, 0.2);
    color: var(--secondary-accent);
    border: 1px solid rgba(35, 193, 237, 0.4);
}

.accuracy-badge.good {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
    border: 1px solid rgba(74, 222, 128, 0.4);
}

.accuracy-badge.moderate {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.4);
}

.results-findings {
    margin-top: 3em;
    background: var(--card-bg);
    padding: 2em 2.5em;
    border-radius: var(--card-radius);
    border: 1px solid rgba(187, 35, 254, 0.3);
}

.results-findings h3 {
    color: var(--accent);
    font-size: 1.5em;
    margin-bottom: 1em;
}

.results-findings ul {
    list-style: none;
    padding: 0;
}

.results-findings li {
    color: var(--text-soft);
    padding: 0.7em 0;
    padding-left: 2em;
    position: relative;
}

.results-findings li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Team Section */
.team-section {
    background: var(--main-bg);
}

.team-subtitle {
    text-align: center;
    color: var(--text-soft);
    font-size: 1.2em;
    margin: -1em 0 3em 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5em;
    margin-top: 3em;
}

.team-card {
    background: var(--card-bg);
    padding: 2.5em 2em;
    border-radius: var(--card-radius);
    text-align: center;
    border: 2px solid rgba(187, 35, 254, 0.2);
    transition: all 0.3s ease;
}

.team-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.team-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(187, 35, 254, 0.3);
}

.team-card:hover .team-avatar {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(187, 35, 254, 0.5);
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--gradient-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5em;
    font-size: 2em;
    font-weight: 700;
    color: #fff;
    border: 3px solid var(--accent);
    transition: all 0.3s ease;
}

.team-avatar-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5em;
    border: 4px solid var(--accent);
    transition: all 0.3s ease;
    object-fit: cover;
    display: block;
    box-shadow: 0 4px 20px rgba(187, 35, 254, 0.3);
}

.team-link:hover .team-avatar-img {
    transform: scale(1.05);
    border-color: var(--secondary-accent);
    box-shadow: 0 6px 30px rgba(187, 35, 254, 0.5);
}

.team-card h3 {
    color: #fff;
    font-size: 1.3em;
    margin: 0.5em 0;
}

.team-role {
    color: var(--text-soft);
    font-size: 1em;
    margin-bottom: 1em;
}

.team-cta {
    display: inline-block;
    color: var(--secondary-accent);
    font-size: 0.95em;
    font-weight: 600;
    margin-top: 1em;
    padding: 0.6em 1.5em;
    border: 2px solid var(--secondary-accent);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.team-link:hover .team-cta {
    background: var(--secondary-accent);
    color: var(--main-bg);
    transform: scale(1.05);
}

/* Acknowledgment Section */
.acknowledgment-section {
    background: var(--gradient-dark);
}

.acknowledgment-content {
    max-width: 900px;
    margin: 2em auto;
}

.acknowledgment-card {
    background: var(--card-bg);
    padding: 3.5em 3em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.3);
    box-shadow: 0 10px 40px rgba(187, 35, 254, 0.2);
    text-align: center;
}

.acknowledgment-icon {
    font-size: 4em;
    margin-bottom: 0.5em;
}

.acknowledgment-card h3 {
    font-size: 2em;
    color: var(--accent);
    margin-bottom: 0.3em;
    font-weight: 700;
}

.acknowledgment-title {
    color: var(--secondary-accent);
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 1.5em;
}

.acknowledgment-text {
    color: var(--text-soft);
    font-size: 1.15em;
    line-height: 1.9;
    text-align: justify;
    margin: 0;
}

/* Footer */
.footer {
    background: var(--card-bg);
    padding: 3em 2em 1.5em;
    border-top: 2px solid rgba(187, 35, 254, 0.3);
}

.footer-content-simple {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2em;
    flex-wrap: wrap;
    gap: 2em;
}

.footer-links-row {
    display: flex;
    gap: 2em;
    flex-wrap: wrap;
}

.footer-links-row a {
    color: var(--secondary-accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.footer-links-row a:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

.footer-contact {
    text-align: right;
}

.footer-contact a {
    color: var(--secondary-accent);
    text-decoration: none;
    font-size: 1.1em;
    font-weight: 700;
    transition: color 0.3s ease;
}

.footer-contact a:hover {
    color: #fff;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2em;
    margin-bottom: 2em;
}

.footer-section h3,
.footer-section h4 {
    color: var(--accent);
    margin-bottom: 1em;
}

.footer-section p {
    color: var(--text-soft);
    margin: 0.5em 0;
}

.footer-institution {
    color: var(--secondary-accent) !important;
    font-weight: 600;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin: 0.7em 0;
}

.footer-links a {
    color: var(--text-soft);
    text-decoration: none;
    transition: all 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 0.5em;
}

.footer-section a {
    color: var(--secondary-accent);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2em;
    border-top: 1px solid rgba(187, 35, 254, 0.2);
    color: var(--text-soft);
    font-size: 0.9em;
    white-space: nowrap;
}

.footer-bottom p {
    margin: 0;
}

.uob-link {
    color: var(--secondary-accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.uob-link:hover {
    color: #fff;
    border-bottom-color: var(--secondary-accent);
}

/* Live Demo Section */
.demo-section {
    background: var(--gradient-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-soft);
    font-size: 1.1em;
    margin-top: -1em;
    margin-bottom: 3em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1em;
}

.demo-container {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2em;
    margin-top: 3em;
}

.demo-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1.5em;
}

.step-content h3 {
    text-align: center;
    color: var(--accent);
    font-size: 1.3em;
    margin-bottom: 1em;
}

.demo-arrow {
    font-size: 3em;
    color: var(--secondary-accent);
    align-self: center;
    margin-top: 4em;
}

.demo-mockup {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid rgba(187, 35, 254, 0.3);
    width: 100%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.mockup-header {
    background: #2a1a42;
    padding: 0.8em 1em;
    display: flex;
    align-items: center;
    gap: 1em;
    border-bottom: 1px solid rgba(187, 35, 254, 0.2);
}

.mockup-dots {
    display: flex;
    gap: 0.4em;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

.mockup-header span:last-child {
    color: var(--text-soft);
    font-size: 0.9em;
}

.mockup-body {
    padding: 1.5em;
}

.mockup-label {
    color: var(--text-soft);
    font-size: 0.9em;
    margin-bottom: 0.5em;
}

.mockup-input {
    background: var(--main-bg);
    padding: 1em;
    border-radius: 8px;
    color: #fff;
    border: 1px solid rgba(187, 35, 254, 0.3);
    margin-bottom: 1em;
}

.mockup-button {
    background: var(--accent);
    color: #fff;
    padding: 0.8em;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
}

.mockup-code pre {
    background: var(--main-bg);
    padding: 1em;
    border-radius: 8px;
    color: var(--secondary-accent);
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    line-height: 1.6;
    overflow-x: auto;
}

.mockup-timing {
    display: flex;
    gap: 1em;
    margin-top: 1em;
    justify-content: space-between;
    font-size: 0.85em;
}

.mockup-timing span {
    background: rgba(35, 193, 237, 0.2);
    color: var(--secondary-accent);
    padding: 0.4em 0.8em;
    border-radius: 6px;
}

.mockup-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.mockup-table thead {
    background: rgba(187, 35, 254, 0.2);
}

.mockup-table th,
.mockup-table td {
    padding: 0.8em;
    text-align: left;
    border-bottom: 1px solid rgba(187, 35, 254, 0.1);
}

.mockup-table th {
    color: var(--accent);
    font-weight: 600;
}

.mockup-table td {
    color: var(--text-soft);
}

.mockup-table tbody tr:hover {
    background: rgba(187, 35, 254, 0.1);
}

/* Resources Page Styles */
.resources-hero {
    background: var(--gradient-purple);
    padding: 4em 2em;
    text-align: center;
    position: relative;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    color: var(--text-soft);
    text-decoration: none;
    font-size: 1.1em;
    font-weight: 500;
    padding: 0.8em 1.5em;
    border-radius: 12px;
    background: rgba(187, 35, 254, 0.1);
    border: 2px solid rgba(187, 35, 254, 0.3);
    transition: all 0.3s ease;
    margin-bottom: 2em;
}

.back-button-mobile {
    display: none;
}

.back-button:hover {
    background: rgba(187, 35, 254, 0.2);
    border-color: var(--accent);
    color: #fff;
    transform: translateX(-5px);
}

.back-arrow {
    font-size: 1.3em;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.back-button:hover .back-arrow {
    transform: translateX(-3px);
}

.resources-title {
    font-size: 3em;
    color: var(--accent);
    margin-bottom: 0.5em;
    font-weight: 700;
}

.resources-description {
    font-size: 1.2em;
    color: var(--text-soft);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.resources-section {
    background: var(--main-bg);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2em;
    margin-top: 3em;
}

.resource-card {
    background: var(--card-bg);
    padding: 2.5em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.2);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.resource-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(187, 35, 254, 0.4);
}

.resource-icon {
    font-size: 3.5em;
    margin-bottom: 0.5em;
}

.resource-title {
    color: #fff;
    font-size: 1.5em;
    margin: 0.5em 0;
    font-weight: 700;
}

.resource-description {
    color: var(--text-soft);
    line-height: 1.7;
    margin: 1em 0;
    flex-grow: 1;
}

.resource-meta {
    display: flex;
    gap: 1em;
    margin: 1.5em 0;
    flex-wrap: wrap;
}

.meta-item {
    background: rgba(187, 35, 254, 0.15);
    color: var(--accent);
    padding: 0.4em 1em;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: 600;
    border: 1px solid rgba(187, 35, 254, 0.3);
}

.resource-btn-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    padding: 1em 2.5em;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05em;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(187, 35, 254, 0.3);
    min-height: 48px;
}

.resource-btn-link:hover {
    background: #9b1fd6;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(187, 35, 254, 0.5);
}

.resource-btn-link:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(187, 35, 254, 0.4);
}

/* Info Section */
.info-section {
    background: var(--gradient-dark);
}

.info-box {
    background: var(--card-bg);
    padding: 2.5em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.3);
}

.info-box h3 {
    color: var(--accent);
    font-size: 1.5em;
    margin-bottom: 1em;
}

.info-list {
    list-style: none;
    padding: 0;
}

.info-list li {
    color: var(--text-soft);
    padding: 0.7em 0;
    padding-left: 2em;
    position: relative;
    line-height: 1.7;
}

.info-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4ade80;
    font-weight: bold;
    font-size: 1.2em;
}

.info-list a {
    color: var(--secondary-accent);
    text-decoration: none;
}

.info-list a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* Citation Section */
.citation-section {
    background: var(--main-bg);
}

.citation-section h3 {
    color: var(--accent);
    font-size: 1.8em;
    text-align: center;
    margin-bottom: 1.5em;
}

.citation-box {
    background: var(--card-bg);
    padding: 2em;
    border-radius: var(--card-radius);
    border: 2px solid rgba(187, 35, 254, 0.3);
    max-width: 900px;
    margin: 0 auto;
}

.citation-box pre {
    color: var(--text-soft);
    font-family: 'Courier New', monospace;
    font-size: 1em;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Responsive Design - Mobile First Approach */
@media (max-width: 768px) {
    :root {
        --nav-height: 85px;
    }

    .hero {
        padding: 3em 1.2em;
    }

    .hero-badge {
        font-size: 0.8em;
        padding: 0.6em 1.2em;
        line-height: 1.4;
    }

    .hero-title {
        font-size: 2.8em;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1.4em;
    }

    .hero-description {
        font-size: 1.05em;
        line-height: 1.7;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 1.2em;
        width: 100%;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 400px;
        padding: 1.2em 2em;
        font-size: 1.15em;
    }

    .section {
        padding: 3em 1.2em;
    }

    .section-title {
        font-size: 2.2em;
        margin-bottom: 0.8em;
    }

    .problem-grid,
    .features-grid,
    .team-grid {
        grid-template-columns: 1fr;
        gap: 1.8em;
    }

    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5em;
    }

    .navbar {
        padding: 0 4vw;
        height: 85px;
    }

    .navbar-right {
        gap: 0.6em;
    }

    .nav-link,
    .resource-btn,
    .contact-btn {
        padding: 0.8em 1.4em;
        font-size: 0.95em;
        min-height: 44px;
    }

    .nav-title {
        font-size: 1.3em;
    }

    .subtitle {
        font-size: 0.85em;
    }

    .resource-card,
    .problem-card,
    .feature-card {
        padding: 2em 1.5em;
    }

    .team-card {
        padding: 2.5em 1.8em;
    }

    .resource-btn-link {
        width: 100%;
        padding: 1.1em 2em;
        font-size: 1.1em;
    }

    .arch-layer {
        flex-direction: column;
    }

    .arch-box {
        max-width: 100%;
    }

    .arch-box.small {
        max-width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2em;
    }

    .footer-content-simple {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 1em;
        flex-wrap: nowrap;
    }

    .footer-links-row {
        flex-direction: row;
        gap: 0.8em;
        flex-wrap: nowrap;
        font-size: 0.85em;
    }

    .footer-links-row a {
        white-space: nowrap;
    }

    .navbar-right {
        display: flex;
        align-items: center;
        gap: 0;
    }

    .nav-link {
        padding: 0.7em 1.2em;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .footer-contact {
        text-align: center;
        font-size: 0.85em;
    }

    .footer-contact a {
        font-size: 1em;
    }

    .demo-container {
        flex-direction: column;
        gap: 2.5em;
    }

    .demo-step {
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
    }

    .demo-mockup {
        font-size: 0.95em;
    }

    .section-subtitle {
        font-size: 1em;
        margin-bottom: 2em;
    }

    .demo-arrow {
        transform: rotate(90deg);
        margin: 0;
    }

    .back-button-desktop {
        display: none;
    }

    .back-button-mobile {
        display: inline-flex;
        position: fixed;
        bottom: 2em;
        left: 1em;
        margin: 0;
        font-size: 1em;
        padding: 0.75em 1.3em;
        z-index: 1000;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        background: rgba(187, 35, 254, 0.95);
        backdrop-filter: blur(10px);
        color: #fff;
    }

    .resources-hero {
        padding: 3em 1.5em 5em 1.5em;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2.5em 1em;
    }

    .hero-badge {
        font-size: 0.75em;
        padding: 0.5em 1em;
        line-height: 1.3;
    }

    .hero-title {
        font-size: 2.3em;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        font-size: 1.25em;
    }

    .resources-title {
        font-size: 2.2em;
    }

    .back-button-desktop {
        display: none;
    }

    .back-button-mobile {
        display: inline-flex;
        position: fixed;
        bottom: 1.5em;
        left: 1em;
        margin: 0;
        font-size: 0.9em;
        padding: 0.65em 1.1em;
        z-index: 1000;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        background: rgba(187, 35, 254, 0.95);
        backdrop-filter: blur(10px);
        color: #fff;
    }

    .resources-hero {
        padding: 3em 1.5em 5em 1.5em;
    }

    .footer-bottom {
        font-size: 0.7em;
    }

    .section-title {
        font-size: 1.9em;
    }

    .container {
        padding: 0 1em;
    }

    .abstract-content {
        padding: 2em 1.5em;
        text-align: left;
    }

    .abstract-content p {
        font-size: 1.05em;
        line-height: 1.6;
        margin: 1.2em 0;
        text-align: left;
        word-spacing: normal;
        letter-spacing: normal;
    }

    .acknowledgment-card {
        padding: 2.5em 1.5em;
    }

    .acknowledgment-icon {
        font-size: 3em;
    }

    .acknowledgment-card h3 {
        font-size: 1.6em;
    }

    .acknowledgment-title {
        font-size: 1.1em;
    }

    .acknowledgment-text {
        font-size: 1.05em;
        line-height: 1.7;
        text-align: left;
    }

    .resource-card,
    .problem-card,
    .feature-card {
        padding: 2em 1.3em;
    }

    .team-card {
        padding: 2.2em 1.5em;
    }

    .navbar {
        padding: 0 3vw;
    }

    .nav-title {
        font-size: 1.2em;
    }

    .subtitle {
        font-size: 0.8em;
    }

    .btn-primary, .btn-secondary {
        padding: 1.15em 2em;
        font-size: 1.1em;
    }

    .resource-btn-link {
        padding: 1.05em 1.8em;
        font-size: 1.08em;
    }

    .resources-grid {
        grid-template-columns: 1fr;
        gap: 1.5em;
    }

    .footer-links-row {
        gap: 0.5em;
        font-size: 0.75em;
    }

    .footer-contact {
        font-size: 0.75em;
    }

    .footer-contact a {
        font-size: 0.95em;
    }

    .demo-mockup {
        font-size: 0.85em;
        padding: 1em;
    }

    .demo-step {
        max-width: 100%;
    }

    .section-subtitle {
        font-size: 0.9em;
        margin-bottom: 1.5em;
        padding: 0 0.5em;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2em;
        margin-bottom: 1em;
    }

    .mockup-table {
        font-size: 0.8em;
        overflow-x: auto;
        display: block;
    }

    .mockup-table table {
        min-width: 100%;
    }

    .mockup-timing {
        font-size: 0.85em;
        gap: 0.5em;
    }

    .demo-arrow {
        font-size: 2.5em;
    }
}