:root {
    /* Modern Color Palette */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1f;

    --text-primary: #ffffff;
    --text-secondary: #a8a8b3;
    --text-tertiary: #6b6b7c;

    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-color: rgba(99, 102, 241, 0.1);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Space Mono', 'SF Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background Effects */
.bg-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: -100px;
    right: -100px;
    animation-delay: 5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading-screen.hide {
    opacity: 0;
    visibility: hidden;
}

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

.logo-loader {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
}

.logo-loader .logo-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-pulse {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-primary);
    border-radius: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-bar {
    width: 200px;
    height: 3px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto 1rem;
}

.loading-progress {
    height: 100%;
    background: var(--accent-gradient);
    animation: loadingProgress 2s ease-out forwards;
}

@keyframes loadingProgress {
    0% {
        width: 0%;
    }

    100% {
        width: 100%;
    }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

/* Main Container */
.main-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 2.5s forwards;
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    color: white;
    box-shadow: 0 8px 32px var(--shadow-color);
}

.logo-info h1 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.125rem;
}

.version {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 100px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: statusPulse 2s infinite;
}

@keyframes statusPulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

.status-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Hero Section */
.hero {
    padding: 5rem 0 3rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Input Section */
.input-section {
    padding: 3rem 0;
}

.input-container {
    max-width: 600px;
    margin: 0 auto;
}

.input-wrapper {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.session-input {
    width: 100%;
    padding: 1.25rem 3.5rem 1.25rem 3.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    outline: none;
}

.session-input:focus {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.session-input::placeholder {
    color: var(--text-tertiary);
    font-weight: 400;
}

.clear-btn {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s ease;
}

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

.action-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    flex: 1;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 8px 32px var(--shadow-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px var(--shadow-color);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-icon {
    display: flex;
    align-items: center;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Results Section */
.results-section {
    padding: 2rem 0;
    min-height: 200px;
}

.results-container {
    max-width: 600px;
    margin: 0 auto;
}

.result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.result-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.result-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.result-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.result-icon.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.result-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.result-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

.result-list {
    list-style: none;
    margin-top: 1rem;
}

.result-list li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-list li::before {
    content: "→";
    color: var(--accent-primary);
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--accent-gradient);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    margin-top: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px var(--shadow-color);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px var(--shadow-color);
}

/* Features Grid */
.features {
    padding: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 8px 32px var(--shadow-color);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Footer */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--accent-primary);
}

.footer-badge {
    padding: 0.25rem 0.75rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success);
    letter-spacing: 0.05em;
}

.footer-time {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .action-buttons {
        flex-direction: column;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 0 1rem;
    }

    .hero {
        padding: 3rem 0 2rem;
    }

    .session-input {
        font-size: 1rem;
        padding: 1rem 3rem;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.875rem;
    }
}

/* Dark mode scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

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