/* style2025.css - Accessible & Responsive Design System */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@200..800&family=Roboto:wght@400;500;700&display=swap');

@layer base {
    :root {
        /* Light Theme */
        --gradient-noble: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #3b82f6 100%);
        --gradient-gold: linear-gradient(90deg, #d4af37 0%, #fde047 100%);
        --glass-bg: rgba(255, 255, 255, 0.92);
        --text-primary: #0f172a;
        --text-secondary: #334155;
        --surface-primary: #ffffff;
        --surface-secondary: #f8fafc;
        --spacing-unit: 1rem;
        --radius-base: 0.5rem;
        
        /* Accessible Focus Ring */
        --focus-ring: 0 0 0 3px rgba(59, 130, 246, 0.5);
    }

    .font-roboto {
        font-family: 'Roboto', sans-serif;
    }

    /* Dark Theme */
    @media (prefers-color-scheme: dark) {
        :root {
            --gradient-noble: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 50%, #0f172a 100%);
            --gradient-gold: linear-gradient(90deg, #fde047 0%, #d4af37 100%);
            --glass-bg: rgba(15, 23, 42, 0.95);
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --surface-primary: #0f172a;
            --surface-secondary: #1e293b;
        }
    }

    html {
        font-family: 'Manrope', system-ui, sans-serif;
        scroll-behavior: smooth;
        color: var(--text-primary);
        background: var(--surface-secondary);
    }

    body {
        min-height: 100vh;
        line-height: 1.6;
        transition: background-color 0.3s ease;
        font-family: system-ui, sans-serif;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Roboto', sans-serif;
        font-weight: 700;
        letter-spacing: -0.01em;
        color: var(--text-primary);
    }

    /* Accessibility: Focus States */
    *:focus-visible {
        outline: none;
        box-shadow: var(--focus-ring);
    }

    /* Reduced Motion */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
}

@layer utilities {
    /* Responsive Spacing System */
    .padding-x { padding-left: var(--spacing-unit); padding-right: var(--spacing-unit); }
    .padding-y { padding-top: var(--spacing-unit); padding-bottom: var(--spacing-unit); }
    
    @media (min-width: 640px) {
        .sm\:padding-x { padding-left: calc(var(--spacing-unit) * 1.5); padding-right: calc(var(--spacing-unit) * 1.5); }
        .sm\:padding-y { padding-top: calc(var(--spacing-unit) * 1.5); padding-bottom: calc(var(--spacing-unit) * 1.5); }
    }

    /* Flex & Grid Utilities */
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .grid-auto-fit { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
    
    /* Typography Scale */
    .text-step-0 { font-size: 1rem; }
    .text-step-1 { font-size: clamp(1.25rem, 4vw, 1.5rem); }
    .text-step-2 { font-size: clamp(1.5rem, 5vw, 2rem); }

    /* Form Elements */
    .input-field {
        padding: 0.75rem;
        border: 2px solid var(--text-secondary);
        border-radius: var(--radius-base);
        background: var(--surface-primary);
        transition: border-color 0.3s ease;
    }

    .input-field:focus {
        border-color: var(--text-primary);
    }

    /* Loading States */
    .spinner {
        width: 2rem;
        height: 2rem;
        border: 3px solid var(--text-secondary);
        border-top-color: transparent;
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }

    @keyframes spin {
        to { transform: rotate(360deg); }
    }

    /* Modal Transitions */
    .modal-enter {
        opacity: 0;
        transform: translateY(20px);
    }

    .modal-enter-active {
        opacity: 1;
        transform: translateY(0);
        transition: all 0.3s ease-out;
    }
}

@layer components {
    /* Enhanced Card Component */
    .card {
        background: var(--surface-primary);
        border-radius: calc(var(--radius-base) * 2);
        padding: var(--spacing-unit);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        transition: transform 0.2s ease;
    }

    .card:hover {
        transform: translateY(-2px);
    }

    /* Accessible Navigation */
    .nav-link {
        position: relative;
        padding: 0.5rem 1rem;
        color: var(--text-secondary);
    }

    .nav-link[aria-current="page"] {
        color: var(--text-primary);
        font-weight: 600;
    }

    /* Form Validation */
    .input-error {
        border-color: #dc2626;
        background: #fee2e2;
    }

    .error-message {
        color: #dc2626;
        font-size: 0.875rem;
        margin-top: 0.25rem;
    }

    /* Dark Mode Toggle */
    .theme-switcher {
        position: relative;
        padding: 0.5rem;
        border-radius: var(--radius-base);
        background: var(--surface-secondary);
    }

    /* Tooltip System */
    [data-tooltip] {
        position: relative;
        cursor: help;
    }

    [data-tooltip]:hover::after {
        content: attr(data-tooltip);
        position: absolute;
        bottom: 100%;
        left: 50%;
        transform: translateX(-50%);
        background: var(--surface-primary);
        color: var(--text-primary);
        padding: 0.5rem 1rem;
        border-radius: var(--radius-base);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        white-space: nowrap;
    }

    /* Responsive Tables */
    .responsive-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Breakpoint System */
@media (min-width: 640px) {
    .sm\:text-balance { text-wrap: balance; }
}

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

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Print Styles */
@media print {
    body { background: white; color: black; }
    .no-print { display: none; }
}

/* Markdown Specific Component Styles */
.markdown-speakers ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    color: #475569;
    columns: 1;
}
@media (min-width: 768px) {
    .markdown-speakers ul {
        columns: 2;
        column-gap: 2rem;
    }
}
.markdown-tas ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    color: #475569;
}
.markdown-speakers li, .markdown-tas li {
    padding-bottom: 0.5rem;
    font-weight: 300;
}
.markdown-speakers li:last-child, .markdown-tas li:last-child {
    padding-bottom: 0;
}

.markdown-schedule table {
    width: 100%;
    min-width: 800px;
    text-align: left;
    border-collapse: collapse;
}
.markdown-schedule thead {
    background-color: #f8fafc;
    color: #334155;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
}
.markdown-schedule th, .markdown-schedule td {
    padding: 1rem 1.25rem;
    border-right: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    vertical-align: top;
}
.markdown-schedule td:first-child {
    white-space: nowrap;
}
.markdown-schedule th {
    text-align: center;
}
.schedule-week-row td {
    background-color: #f1f5f9; /* slate-100 */
    color: #0f172a; /* slate-900 */
    font-weight: 700;
    text-align: center !important;
    font-family: 'Roboto', sans-serif;
    font-size: 1.1rem;
    padding: 0.75rem !important;
    border-right: none !important;
}

/* Generic Markdown Table Styles (Plain) */
.markdown-table table {
    width: 100%;
    min-width: 700px;
    text-align: left;
    border-collapse: collapse;
    background-color: #ffffff;
}
.markdown-table thead {
    background-color: #f8fafc;
    color: #334155;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
}
.markdown-table th, .markdown-table td {
    padding: 1rem 1.25rem;
    border: 1px solid #e2e8f0;
}
.markdown-table td:first-child {
    white-space: nowrap;
}
.markdown-table th {
    text-align: left;
    background-color: #f8fafc;
}

.week-divider td {
    border-top: 3px solid #cbd5e1 !important;
}

/* Participants Table Styles */
.markdown-participants h3 {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: 'Roboto', sans-serif;
    color: #0f172a;
    margin-bottom: 1.5rem;
    margin-top: 2rem;
}

.markdown-participants table {
    width: 100%;
    min-width: 900px;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    overflow: hidden;
    margin-bottom: 3rem;
}

.markdown-participants thead {
    background-color: #f8fafc;
    border-bottom: 2px solid #e2e8f0;
}

.markdown-participants th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #334155;
    border-bottom: 1px solid #e2e8f0;
}

.markdown-participants td {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    color: #374151;
    border-bottom: 1px solid #e2e8f0;
    white-space: nowrap;
}

.markdown-participants tr:last-child td {
    border-bottom: none;
}

.markdown-participants code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.875rem;
    color: #475569;
}