* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-black: #000000;
    --color-zinc-950: #09090b;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--color-black);
    color: var(--color-white);
    line-height: 1.6;
}

html {
    scroll-behavior: smooth;
}

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

/* Navigation */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

#navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

.nav-brand:hover {
    color: var(--color-gray-300);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    left: 0;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-menu {
    display: flex;
    gap: 0.25rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-black);
    background-image: url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8), rgba(0,0,0,0.9), rgba(0,0,0,0.95));
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    margin-bottom: 2rem;
    animation: fadeIn 1s ease;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 2rem);
    color: var(--color-gray-300);
    font-weight: 300;
    margin-bottom: 1rem;
}

.hero-university {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-gray-400);
    margin-bottom: 3rem;
}

.hero-theme {
    display: inline-block;
    padding: 2rem 0;
}

.theme-label {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    margin-bottom: 0.5rem;
}

.theme-name {
    font-size: clamp(1.875rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-white);
}

.hero-desc {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-gray-400);
    padding-top: 1rem;
    margin-bottom: 3rem;
}

.scroll-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-white);
    text-decoration: none;
    margin-top: 3rem;
    transition: color 0.3s ease;
}

.scroll-btn span {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-btn:hover {
    color: var(--color-gray-300);
}

.chevron {
    transition: transform 0.3s ease;
}

.scroll-btn:hover .chevron {
    transform: translateY(4px);
}

.hero-bounce {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    color: var(--color-gray-500);
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Container */
.container {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Sections */
.section-dark {
    background-color: var(--color-black);
    padding: 8rem 0;
    border-top: 1px solid var(--color-gray-900);
}

.section-light {
    background-color: var(--color-zinc-950);
    padding: 8rem 0;
    border-top: 1px solid var(--color-gray-900);
}

.section-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 4rem;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

@media (min-width: 1024px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-2-skills {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

@media (min-width: 768px) {
    .grid-2-skills {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-2-compact {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .grid-2-compact {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

@media (min-width: 768px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Border Left Accent */
.border-left {
    border-left: 2px solid var(--color-gray-800);
    padding-left: 2rem;
    margin-bottom: 4rem;
}

/* Text Styles */
.text-lg {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    line-height: 1.75;
    margin-bottom: 2rem;
}

.text-lg-gray {
    font-size: 1.125rem;
    color: var(--color-gray-400);
    line-height: 1.75;
}

.text-gray {
    color: var(--color-gray-400);
    line-height: 1.75;
    margin-bottom: 1.5rem;
}

.text-gray-500 {
    color: var(--color-gray-500);
    margin-bottom: 1.5rem;
}

.text-2xl {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.text-3xl {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.text-xl {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.text-xl-gray {
    font-size: 1.25rem;
    color: var(--color-gray-400);
    margin-bottom: 2rem;
}

.text-xl-bold {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.text-lg-bold {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.highlight {
    font-weight: 600;
    color: var(--color-white);
}

/* Images */
.about-image {
    margin-bottom: 3rem;
}

.about-image img {
    width: 100%;
    max-width: 48rem;
    margin: 0 auto;
    border-radius: 0.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.gcsp-logo {
    margin-bottom: 1.5rem;
}

.gcsp-logo img {
    width: 12rem;
}

.gcsp-logo-small {
    margin-bottom: 1rem;
}

.gcsp-logo-small img {
    width: 8rem;
}

.wisk-logo {
    margin-bottom: 1.5rem;
}

.wisk-logo img {
    height: 3rem;
}

.course-image {
    margin-bottom: 1.5rem;
}

.course-image img {
    width: 100%;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.section-image {
    margin-bottom: 2rem;
}

.section-image img {
    width: 100%;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

/* Content Spaces */
.content-space {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Competencies List */
.competencies-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.competency-item h5 {
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.25rem;
}

.competency-item p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

/* Features List */
.features-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-item h6 {
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Numbered List */
.numbered-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.numbered-item {
    display: flex;
    gap: 0.75rem;
    color: var(--color-gray-300);
}

.number {
    color: var(--color-gray-600);
    font-weight: 700;
}

/* Bullet Lists */
.bullet-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1rem 0;
}

.bullet-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--color-gray-400);
}

.bullet-list li::before {
    content: '•';
    color: var(--color-gray-600);
    margin-top: 0.25rem;
}

.bullet-list-compact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.bullet-list-compact li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

.bullet-list-compact li::before {
    content: '•';
    color: var(--color-gray-600);
    margin-top: 0.25rem;
}

/* Connection Boxes */
.connection-box {
    margin-top: 4rem;
}

.connection-mini {
    background-color: var(--color-zinc-950);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--color-gray-800);
    margin-top: 1.5rem;
}

.connection-mini h5 {
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.connection-mini p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Course Topics */
.course-topics {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.topic-item h5 {
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.topic-item p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Skills */
.skill-item {
    margin-bottom: 2rem;
}

.skill-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.skill-item p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

.skills-box {
    background-color: var(--color-zinc-900);
    border-radius: 0.5rem;
    padding: 2rem;
    border: 1px solid var(--color-gray-800);
    margin: 2rem 0;
}

/* Service Items */
.service-item h5 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.service-item p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Impact Box */
.impact-box {
    background-color: var(--color-zinc-900);
    border-radius: 0.5rem;
    padding: 2rem;
    border: 1px solid var(--color-gray-800);
    margin: 2rem 0;
}

.impact-box h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.growth-box {
    background-color: var(--color-zinc-900);
    border-radius: 0.5rem;
    padding: 2rem;
    border: 1px solid var(--color-gray-800);
    margin: 1.5rem 0;
}

/* Competencies Summary */
.competencies-summary {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.competency-summary h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.competency-summary p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Connectivity Items */
.connectivity-items {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.connectivity-item h4 {
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.connectivity-item p {
    color: var(--color-gray-400);
    line-height: 1.75;
}

/* Feedback Box */
.feedback-box {
    background-color: var(--color-zinc-900);
    border-radius: 0.5rem;
    padding: 2rem;
    border: 1px solid var(--color-gray-800);
    margin-top: 2rem;
}

.feedback-box h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    padding: 4rem 0;
    border-top: 1px solid var(--color-gray-900);
}

.footer-content {
    text-align: center;
    margin-bottom: 3rem;
}

.footer-title {
    font-size: clamp(1.875rem, 4vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-grid h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-grid p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.theme-highlight {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-gray-900);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    color: var(--color-gray-400);
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--color-white);
}

/* Mobile Menu */
@media (max-width: 1023px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.98);
        flex-direction: column;
        padding: 1.5rem;
        gap: 0.5rem;
        border-top: 1px solid var(--color-gray-800);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        text-align: left;
    }
}

/* Responsive Typography */
@media (max-width: 768px) {
    .section-dark,
    .section-light {
        padding: 4rem 0;
    }

    .border-left {
        padding-left: 1rem;
    }
}