:root {
    --color-primary: #6366f1;
    --color-secondary: #a78bfa;
    --color-accent: #ec4899;
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-surface-light: #334155;
    --text-primary: #f1f5f9;
    --text-muted: #cbd5e1;
    --radius-card: 16px;
    --shadow: 0 20px 60px rgba(99, 102, 241, 0.2);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --space-4: 16px;
    --space-5: 24px;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background: linear-gradient(135deg, var(--color-bg) 0%, #1a1f3a 50%, #0f172a 100%);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

main {
    margin: 8px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-4)
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    }

    50% {
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.6);
    }
}

.site-header {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    height: 36px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav a {
    margin-left: 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width 0.3s ease;
}

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

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

.hero.minimal {
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero.minimal::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: glow 4s ease-in-out infinite;
}

.hero.minimal h1 {
    font-family: "Poppins", Inter, sans-serif;
    font-size: 64px;
    font-weight: 800;
    margin: 0 0 16px;
    background: linear-gradient(135deg, #6366f1 0%, #a78bfa 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
    letter-spacing: -1px;
}

.subhead {
    font-size: 20px;
    color: var(--text-muted);
    margin: 0 0 32px;
    line-height: 1.6;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.simple-section {
    padding: 60px 0;
    animation: fadeInUp 0.8s ease-out both;
}

.simple-section:nth-child(3) {
    animation-delay: 0.3s;
}

.simple-section:nth-child(4) {
    animation-delay: 0.6s;
}

.simple-section h2 {
    font-family: "Poppins", Inter, sans-serif;
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 20px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.simple-section p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-muted);
    margin: 0 0 16px;
}

.simple-list {
    color: var(--text-primary);
    margin: 16px 0 0;
    padding-left: 0;
    list-style: none;
}

.simple-list li {
    margin: 12px 0;
    color: var(--text-muted);
    padding-left: 32px;
    position: relative;
    transition: all 0.3s ease;
    font-size: 16px;
    line-height: 1.6;
}

.simple-list li::before {
    content: '✨';
    position: absolute;
    left: 0;
    font-size: 18px;
    transition: transform 0.3s ease;
}

.simple-list li:hover {
    color: var(--text-primary);
    padding-left: 40px;
}

.simple-list li:hover::before {
    transform: scale(1.3) rotate(15deg);
}

.site-footer {
    padding: 40px 0 20px;
    background: rgba(15, 23, 42, 0.5);
    border-top: 1px solid rgba(99, 102, 241, 0.1);
    margin-top: 80px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 14px;
    flex-wrap: wrap;
    gap: 24px;
}

.foot-left {
    background: linear-gradient(135deg, var(--text-muted), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 500;
}

.foot-right {
    display: flex;
    gap: 24px;
}

.footer-inner a {
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.footer-inner a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width 0.3s ease;
}

.footer-inner a:hover {
    color: var(--text-primary);
}

.footer-inner a:hover::after {
    width: 100%;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0
}

@media (max-width:900px) {
    .hero-row {
        flex-direction: column;
        align-items: flex-start
    }

    .session-panel {
        flex-direction: column
    }

    .session-right {
        width: 100%
    }
}

@media (max-width:768px) {
    .container {
        padding: 0 16px;
    }

    .site-header {
        padding: 16px 0;
    }

    .header-inner {
        gap: 12px;
    }

    .logo {
        height: 32px;
    }

    .nav a {
        margin-left: 16px;
        font-size: 14px;
    }

    .hero.minimal {
        padding: 80px 0;
        text-align: center;
    }

    .hero.minimal h1 {
        font-size: 40px;
        margin: 0 0 12px;
    }

    .subhead {
        font-size: 18px;
        margin: 0 0 20px;
    }

    .simple-section {
        padding: 48px 0;
    }

    .simple-section h2 {
        font-size: 24px;
        margin: 0 0 14px;
    }

    .simple-section p {
        font-size: 15px;
    }

    .simple-list li {
        font-size: 15px;
        margin: 10px 0;
        padding-left: 28px;
    }

    .simple-list li::before {
        font-size: 16px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .foot-right {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }

    .footer-inner a {
        margin-left: 0;
    }

    .site-footer {
        padding: 30px 0 20px;
        margin-top: 60px;
    }
}

@media (max-width:480px) {
    .container {
        padding: 0 12px;
    }

    .hero.minimal {
        padding: 50px 0;
    }

    .hero.minimal::before {
        width: 400px;
        height: 400px;
        top: -30%;
        right: -30%;
    }

    .hero.minimal h1 {
        font-size: 32px;
        margin: 0 0 10px;
        letter-spacing: -0.5px;
    }

    .subhead {
        font-size: 16px;
        margin: 0 0 16px;
    }

    .site-header {
        padding: 12px 0;
    }

    .logo {
        height: 28px;
    }

    .nav a {
        margin-left: 12px;
        font-size: 13px;
    }

    .simple-section {
        padding: 32px 0;
    }

    .simple-section h2 {
        font-size: 20px;
        margin: 0 0 12px;
    }

    .simple-section p {
        font-size: 14px;
        line-height: 1.6;
    }

    .simple-list li {
        font-size: 14px;
        margin: 10px 0;
        padding-left: 26px;
    }

    .simple-list li::before {
        font-size: 14px;
    }

    .site-footer {
        padding: 24px 0 16px;
        margin-top: 40px;
    }

    .footer-inner {
        font-size: 12px;
    }

    .foot-left {
        font-size: 12px;
    }
}