:root {
    --primary: #5e6ad2;
    --primary-hover: #4b55c4;
    --primary-focus: #3e47a8;
    --on-primary: #ffffff;

    --ink: #0f1011;
    --ink-muted: #2f3437;
    --ink-subtle: #62666d;
    --ink-tertiary: #8a8f98;

    --canvas: #fafafa;
    --surface-1: #ffffff;
    --surface-2: #f4f5f6;
    --surface-3: #eaebeb;

    --hairline: #e4e7eb;
    --hairline-strong: #d1d5db;

    --success: #27a644;
    --danger: #e5484d;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

    --r-xs: 4px;
    --r-sm: 6px;
    --r-md: 8px;
    --r-lg: 12px;
    --r-xl: 16px;
    --r-pill: 9999px;

    --space-xxs: 4px;
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    --space-section: 96px;

    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --transition: 0.2s var(--ease);

    --panel-glow: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.03), transparent);
    --shadow-toast: 0 16px 40px rgba(0, 0, 0, 0.08);
}



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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    letter-spacing: -0.05px;
    color: var(--ink);
    background: var(--canvas);
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

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


.app-shell {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md) var(--space-xxl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Top nav */

.top-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm) var(--space-md);
    min-height: 56px;
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--hairline);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--ink);
}

.brand-logo {
    color: var(--primary);
    filter: drop-shadow(0 0 4px rgba(94, 106, 210, 0.35));
    transition: transform 0.3s var(--ease), filter 0.3s var(--ease);
    flex-shrink: 0;
}

.brand:hover .brand-logo {
    transform: rotate(-3deg) scale(1.05);
    filter: drop-shadow(0 0 8px rgba(94, 106, 210, 0.6));
}

.brand-text {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: -0.2px;
}

.brand-text strong {
    font-weight: 600;
    color: var(--primary);
}

.nav-tagline {
    font-size: 13px;
    color: var(--ink-subtle);
    font-weight: 400;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}



/* Main layout */

.main {
    display: grid;
    grid-template-columns: minmax(280px, 380px) 1fr;
    gap: var(--space-lg);
    align-items: start;
}

/* Panels */

.panel {
    background: var(--surface-1);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: var(--space-lg);
    position: relative;
}

.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 12px;
    right: 12px;
    height: 1px;
    background: var(--panel-glow);
    pointer-events: none;
}

.panel-head {
    margin-bottom: var(--space-lg);
}

.eyebrow {
    display: block;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: var(--ink-subtle);
    margin-bottom: var(--space-xs);
}

.panel-title {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.4px;
    line-height: 1.25;
    color: var(--ink);
    margin-bottom: var(--space-xs);
}

.panel-desc {
    font-size: 14px;
    color: var(--ink-subtle);
    line-height: 1.5;
}

/* Form */

.date-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.field label {
    font-size: 12px;
    font-weight: 500;
    color: var(--ink-subtle);
    letter-spacing: 0.02em;
}

.field input[type="date"],
.select-input {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--hairline);
    border-radius: var(--r-md);
    padding: 10px 12px;
    font-family: var(--font);
    font-size: 14px;
    color: var(--ink);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    color-scheme: light;
}

.field input[type="date"]:hover {
    border-color: var(--hairline-strong);
}

.field input[type="date"]:focus {
    border-color: var(--primary-focus);
    box-shadow: 0 0 0 2px rgba(94, 105, 209, 0.35);
}

::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.7;
}

/* Custom Select */

.custom-select-container {
    position: relative;
    width: 100%;
}

.select-trigger {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--hairline);
    border-radius: var(--r-md);
    padding: 10px 12px;
    font-family: var(--font);
    font-size: 14px;
    color: var(--ink);
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.select-trigger:hover {
    border-color: var(--hairline-strong);
}

.select-trigger:focus-visible {
    border-color: var(--primary-focus);
    box-shadow: 0 0 0 2px rgba(94, 105, 209, 0.35);
}

.select-trigger .chevron-icon {
    color: var(--ink-tertiary);
    transition: transform var(--transition);
}

.custom-select-container.is-open .select-trigger .chevron-icon {
    transform: rotate(180deg);
}

.select-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--surface-1);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-toast);
    z-index: 100;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
    display: flex;
    flex-direction: column;
    max-height: 300px;
    overflow: hidden;
}

.custom-select-container.is-open .select-dropdown {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 8px 12px;
    border-bottom: 1px solid var(--hairline);
    background: var(--surface-2);
}

.search-icon {
    color: var(--ink-tertiary);
    flex-shrink: 0;
}

.search-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font);
    font-size: 13px;
    color: var(--ink);
}

.search-input::placeholder {
    color: var(--ink-tertiary);
}

.options-list {
    list-style: none;
    overflow-y: auto;
    max-height: 240px;
    padding: 4px 0;
}

.options-list::-webkit-scrollbar {
    width: 6px;
}

.options-list::-webkit-scrollbar-thumb {
    background: var(--hairline-strong);
    border-radius: var(--r-pill);
}

.option-item {
    padding: 8px 12px;
    font-size: 13px;
    color: var(--ink-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background var(--transition), color var(--transition);
}

.option-item:hover,
.option-item.is-highlighted {
    background: var(--surface-2);
    color: var(--ink);
}

.option-item.is-selected {
    background: rgba(94, 106, 210, 0.08);
    color: var(--primary);
    font-weight: 500;
}

.no-results {
    padding: 16px;
    font-size: 13px;
    color: var(--ink-tertiary);
    text-align: center;
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    min-height: 40px;
    padding: 8px 14px;
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.2;
    border-radius: var(--r-md);
    border: none;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    margin-top: var(--space-xs);
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-primary:active {
    background: var(--primary-focus);
    transform: scale(0.99);
}

.btn-primary svg {
    transition: transform var(--transition);
}

.btn-primary:hover svg {
    transform: translateX(2px);
}

/* Empty state */

.panel-empty {
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-style: dashed;
    background: transparent;
}

.panel-empty::before {
    display: none;
}

.empty-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--r-lg);
    background: var(--surface-2);
    border: 1px solid var(--hairline);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-tertiary);
    margin-bottom: var(--space-md);
}

.empty-title {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.2px;
    color: var(--ink-muted);
    margin-bottom: var(--space-xs);
}

.empty-desc {
    font-size: 14px;
    color: var(--ink-subtle);
    max-width: 36ch;
}

/* Results */

.results-zone {
    min-width: 0;
}

.results-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.results-stack.is-visible .panel {
    animation: rise-in 0.45s var(--ease) both;
}

.results-stack.is-visible .stat-card:nth-child(1) { animation-delay: 0.05s; }
.results-stack.is-visible .stat-card:nth-child(2) { animation-delay: 0.1s; }
.results-stack.is-visible .stat-card:nth-child(3) { animation-delay: 0.15s; }
.results-stack.is-visible .stat-card:nth-child(4) { animation-delay: 0.2s; }

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel-hero {
    background: var(--surface-2);
    border-color: var(--hairline-strong);
}

.hero-meta {
    margin-bottom: var(--space-md);
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--ink-muted);
    background: var(--surface-3);
    border: 1px solid var(--hairline);
    border-radius: var(--r-pill);
    margin-bottom: var(--space-sm);
}

.hero-range {
    font-size: 18px;
    font-weight: 500;
    color: var(--ink-muted);
    letter-spacing: -0.1px;
}

.hero-range span {
    color: var(--ink);
    font-weight: 600;
}

.hero-metrics {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.hero-duration {
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 600;
    letter-spacing: -1px;
    line-height: 1.1;
    color: var(--ink);
}

.hero-pill {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding: var(--space-sm) var(--space-md);
    background: var(--surface-1);
    border: 1px solid var(--hairline);
    border-radius: var(--r-md);
}

.hero-pill-value {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.hero-pill-label {
    font-size: 12px;
    color: var(--ink-subtle);
}

/* Stats grid */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
}

.stat-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 100%;
}

.stat-title {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.2px;
    color: var(--ink);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--hairline);
}

.stat-subtitle {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: var(--ink-subtle);
    margin-top: 2px;
}

.stat-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    flex: 1;
}

.stat-foot {
    font-size: 12px;
    color: var(--ink-tertiary);
    margin-top: auto;
}

.metric-duo {
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
}

.metric-label {
    display: block;
    font-size: 12px;
    color: var(--ink-subtle);
    margin-bottom: 2px;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: -0.3px;
}

.metric-value-muted {
    color: var(--ink-muted);
}

.metric-large {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: -0.5px;
    min-height: 40px;
    display: flex;
    align-items: center;
}

.progress-track {
    height: 4px;
    background: var(--surface-3);
    border-radius: var(--r-pill);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--primary);
    border-radius: var(--r-pill);
    transition: width 0.6s var(--ease);
}

.kv-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.kv-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--ink-subtle);
    padding: 6px 0;
    border-bottom: 1px solid var(--hairline);
}

.kv-list li:last-child {
    border-bottom: none;
}

.kv-list strong {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
}

/* Details */

.details {
    border: 1px solid var(--hairline);
    border-radius: var(--r-md);
    background: var(--surface-2);
    overflow: hidden;
}

.details summary {
    padding: 10px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--ink-subtle);
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: color var(--transition), background var(--transition);
}

.details summary::-webkit-details-marker {
    display: none;
}

.details summary:hover {
    color: var(--ink);
    background: var(--surface-3);
}

.detail-list {
    max-height: 140px;
    overflow-y: auto;
    list-style: none;
    padding: 8px 12px 12px;
    border-top: 1px solid var(--hairline);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-list::-webkit-scrollbar {
    width: 4px;
}

.detail-list::-webkit-scrollbar-thumb {
    background: var(--hairline-strong);
    border-radius: 4px;
}

.detail-list li {
    font-size: 12px;
    color: var(--ink-subtle);
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

.detail-list li span {
    font-weight: 500;
    color: var(--ink-muted);
}

.detail-list li small {
    color: var(--ink-tertiary);
    font-family: var(--font-mono);
    font-size: 11px;
}

/* Loader */

.loader {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--hairline);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}

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

/* Toast */

.toast-container {
    position: fixed;
    top: var(--space-md);
    right: var(--space-md);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    background: var(--surface-2);
    border: 1px solid var(--hairline-strong);
    border-left: 3px solid var(--danger);
    border-radius: var(--r-md);
    padding: 12px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--ink);
    box-shadow: var(--shadow-toast);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    min-width: 260px;
    max-width: 360px;
    animation: toast-in 0.25s var(--ease) forwards;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Footer */

.site-footer {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--hairline);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    font-size: 12px;
    color: var(--ink-subtle);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--ink-subtle);
}

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

/* Utilities */

.hidden {
    display: none !important;
}

/* Responsive */

@media (max-width: 900px) {
    .main {
        grid-template-columns: 1fr;
    }

    .panel-form {
        order: 0;
    }
}

@media (max-width: 640px) {
    .app-shell {
        padding: var(--space-md) var(--space-sm) var(--space-xl);
    }

    .field-row {
        grid-template-columns: 1fr;
    }

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

    .hero-metrics {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-pill {
        align-items: flex-start;
    }

    .top-nav {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}