/* Neon Purple Night Sky Theme */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --neon: #a855f7;
    --neon-bright: #c084fc;
    --neon-dark: #7c3aed;
    --pink: #ec4899;
    --cyan: #22d3ee;
    --bg: #030014;
    --bg-card: rgba(15, 10, 40, 0.85);
    --bg-code: rgba(8, 5, 25, 0.95);
    --text: #f1f5f9;
    --text-muted: #c4b5fd;
    --border: rgba(168, 85, 247, 0.3);
}

[data-theme="light"] {
    --bg: transparent;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-code: rgba(245, 240, 255, 0.95);
    --text: #1e1b4b;
    --text-muted: #6b21a8;
    --border: rgba(168, 85, 247, 0.3);
}

[data-theme="light"] body::after {
    background: rgba(255, 255, 255, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #030014;
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Galaxy Background Image */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url('https://images.unsplash.com/photo-1519681393784-d120267933ba?w=1920&q=80') center center / cover no-repeat;
    pointer-events: none;
    z-index: 0;
}

/* Overlay for better text readability */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 0, 20, 0.4);
    pointer-events: none;
    z-index: 0;
}

/* Stars */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle 4s infinite;
}

.star.bright {
    box-shadow: 0 0 6px 2px rgba(200, 220, 255, 0.8);
}

.star.blue {
    background: #a0c4ff;
    box-shadow: 0 0 4px 1px rgba(160, 196, 255, 0.6);
}

@keyframes twinkle {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* Content wrapper */
.content {
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(3, 0, 20, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
}

[data-theme="light"] .header {
    background: rgba(255, 255, 255, 0.85);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--neon), var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(168, 85, 247, 0.5);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.nav-link:hover {
    color: var(--neon-bright);
    text-shadow: 0 0 20px rgba(168, 85, 247, 0.8);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--neon);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.theme-toggle:hover {
    background: var(--neon);
    color: white;
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
}

/* Hero */
.hero {
    padding: 10rem 2rem 5rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--neon-bright), var(--pink), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.5)); }
    50% { filter: drop-shadow(0 0 40px rgba(168, 85, 247, 0.8)); }
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 0.85rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon), var(--pink));
    color: white;
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 40px rgba(168, 85, 247, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--neon-bright);
    border: 1px solid var(--neon);
}

.btn-secondary:hover {
    background: rgba(168, 85, 247, 0.1);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

/* Sections */
section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(135deg, var(--neon-bright), var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 3rem;
}

/* Program Cards */
.programs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}

.program-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s;
    backdrop-filter: blur(10px);
}

.program-card:hover {
    transform: translateY(-8px);
    border-color: var(--neon);
    box-shadow: 
        0 0 30px rgba(168, 85, 247, 0.3),
        0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(236, 72, 153, 0.05));
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

.card-badge {
    background: linear-gradient(135deg, var(--neon), var(--pink));
    color: white;
    padding: 0.3rem 0.85rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.4);
}

.card-desc {
    padding: 1rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Code Block */
.code-block {
    background: var(--bg-code);
    margin: 0;
}

.code-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(236, 72, 153, 0.1));
    border-top: 1px solid var(--border);
}

.code-lang {
    color: var(--neon-bright);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-lang::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--neon);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--neon);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 10px var(--neon); }
    50% { opacity: 0.5; box-shadow: 0 0 20px var(--neon); }
}

.copy-btn {
    background: linear-gradient(135deg, var(--neon), var(--neon-dark));
    color: white;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.3);
}

.copy-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px rgba(168, 85, 247, 0.5);
}

.code-content {
    padding: 1rem 1.25rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    overflow-x: auto;
    white-space: pre-wrap;
    color: #e2d9f3;
    max-height: 300px;
    overflow-y: auto;
    border-left: 3px solid var(--neon);
}

[data-theme="light"] .code-content {
    color: #4c1d95;
}

/* SQL Cards */
.sql-section {
    background: rgba(10, 5, 30, 0.7);
    padding: 5rem 2rem;
    margin: 2rem 0;
    backdrop-filter: blur(10px);
    max-width: 100vw;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

[data-theme="light"] .sql-section {
    background: rgba(168, 85, 247, 0.1);
}

.sql-grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    width: 100%;
    padding: 0 1.5rem;
}

.sql-card {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

.sql-section .section-title,
.sql-section .section-subtitle {
    text-align: center;
    max-width: 100%;
}

.sql-card:hover {
    border-color: var(--neon);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.2);
}

.sql-card-body {
    padding: 1.5rem;
}

.sql-top-row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.sql-inner-card {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.sql-structure {
    flex: 0 0 35%;
}

.sql-insert {
    flex: 0 0 63%;
}

.sql-inner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(236, 72, 153, 0.1));
    border-bottom: 1px solid var(--border);
}

.sql-inner-header span {
    color: var(--neon-bright);
    font-weight: 600;
    font-size: 0.9rem;
}

.sql-inner-code {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: #e2d9f3;
    white-space: pre-wrap;
    margin: 0;
    max-height: 250px;
    overflow-y: auto;
}

.sql-queries-card {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    width: 90%;
    margin: 0 auto;
}

.sql-queries-list {
    padding: 1rem;
}

.sql-query-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sql-query-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.sql-query-question {
    color: var(--neon-bright);
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.sql-query-answer {
    position: relative;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 1rem;
    padding-right: 4rem;
}

.sql-query-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: #e2d9f3;
    white-space: pre-wrap;
    margin: 0;
}

.copy-btn-small {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
}

.sql-card-header {
    background: linear-gradient(135deg, var(--neon-dark), var(--pink));
    padding: 1.5rem;
    color: white;
}

.sql-card-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.sql-card-header p {
    opacity: 0.9;
    font-size: 0.9rem;
}

.sql-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: rgba(168, 85, 247, 0.05);
}

.sql-tab {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.sql-tab:hover {
    color: var(--neon-bright);
    background: rgba(168, 85, 247, 0.1);
}

.sql-tab.active {
    color: var(--neon-bright);
    background: rgba(168, 85, 247, 0.15);
    box-shadow: inset 0 -2px 0 var(--neon);
}

.sql-content {
    display: none;
}

.sql-content.active {
    display: block;
}

/* About Section */
.about-section {
    text-align: center;
    padding: 5rem 2rem;
}

.about-text {
    max-width: 600px;
    margin: 0 auto 2rem;
    color: var(--text-muted);
}

.features {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

.feature:hover {
    border-color: var(--neon);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.2);
    transform: translateY(-4px);
}

.feature i {
    font-size: 1.5rem;
    color: var(--neon-bright);
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.5));
}

/* Connect Section */
.connect-section {
    background: rgba(10, 5, 30, 0.7);
    padding: 5rem 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

[data-theme="light"] .connect-section {
    background: rgba(168, 85, 247, 0.1);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s;
    min-width: 120px;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    border-color: var(--neon);
    transform: translateY(-5px);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.3);
}

.social-link i {
    font-size: 1.5rem;
    color: var(--neon-bright);
    filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.5));
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    background: rgba(3, 0, 20, 0.8);
}

[data-theme="light"] .footer {
    background: rgba(255, 255, 255, 0.6);
}

.footer a {
    color: var(--neon-bright);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.footer a:hover {
    text-shadow: 0 0 20px rgba(168, 85, 247, 0.8);
}

/* Toast */
.copied-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: linear-gradient(135deg, var(--neon), var(--pink));
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.5);
}

.copied-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--neon-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neon);
}

/* Loading Screen */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #030014;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--neon-bright), var(--pink), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    animation: pulse-glow 1s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.6)); }
    50% { filter: drop-shadow(0 0 40px rgba(168, 85, 247, 0.9)); }
}

.loader-bar {
    width: 200px;
    height: 4px;
    background: rgba(168, 85, 247, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin: 0 auto;
}

.loader-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon), var(--pink), var(--cyan));
    border-radius: 4px;
    animation: load 1s ease-out forwards;
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.8);
}

@keyframes load {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav { gap: 1rem; font-size: 0.9rem; }
    .programs-grid { grid-template-columns: 1fr; }
    .sql-grid { grid-template-columns: 1fr; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .social-links { flex-wrap: wrap; }
    .features { gap: 1rem; }
}