:root {
    color-scheme: light;
    --bg-top: #f0f6ff;
    --bg-bottom: #f8fbff;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --surface-muted: #f3f7fb;
    --border: rgba(22, 50, 79, 0.12);
    --shadow: 0 18px 48px rgba(22, 50, 79, 0.14);
    --text: #18314f;
    --muted: #5f7287;
    --accent: #1f8f5f;
    --accent-strong: #126a45;
    --accent-soft: rgba(31, 143, 95, 0.12);
    --highlight: #275dad;
    --highlight-soft: rgba(39, 93, 173, 0.12);
    --danger: #b42318;
    --warning: #c76f00;
    --radius-xl: 26px;
    --radius-lg: 18px;
    --radius-md: 14px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100dvh;
    padding: 24px;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(39, 93, 173, 0.14), transparent 24%),
        radial-gradient(circle at bottom right, rgba(31, 143, 95, 0.1), transparent 26%),
        linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.noscript-warning {
    width: min(1100px, 100%);
    margin: 0 auto 20px;
    padding: 14px 18px;
    border: 1px solid rgba(180, 35, 24, 0.24);
    border-radius: var(--radius-md);
    color: var(--danger);
    background: #ffffff;
    font-weight: 700;
}

button,
input,
select {
    font: inherit;
}

button {
    border: none;
    border-radius: 999px;
    padding: 10px 16px;
    color: #ffffff;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    cursor: pointer;
    transition: transform 0.16s ease, box-shadow 0.16s ease, opacity 0.16s ease;
}

button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 18px rgba(18, 106, 69, 0.18);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
    box-shadow: none;
}

button.secondary {
    background: linear-gradient(135deg, #48627f, #314256);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(39, 93, 173, 0.24);
    outline-offset: 2px;
}

input,
select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #ffffff;
    color: var(--text);
    padding: 10px 12px;
}

.app-shell {
    width: min(1100px, 100%);
    margin: 0 auto;
    display: grid;
    gap: 20px;
}

.hero-card,
.control-card,
.stats-card,
.planner-card,
.history-card,
.diagnostics-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--surface);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
}

.hero-card {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 20px;
    padding: 26px 28px;
}

.hero-copy h1,
.card-heading h2 {
    margin: 0;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--highlight);
    font-size: 0.86rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
}

.lead,
.card-heading p,
.helper-text,
.support-hint,
.session-meta,
.ownership-badge,
.plan-summary {
    color: var(--muted);
}

.lead {
    max-width: 52rem;
    margin: 10px 0 0;
    line-height: 1.5;
}

.hero-actions {
    display: grid;
    gap: 10px;
    justify-items: end;
}

.ownership-badge {
    margin: 0;
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--surface-muted);
    font-size: 0.92rem;
}

.status-grid {
    display: grid;
    grid-template-columns: minmax(320px, 1.2fr) minmax(260px, 1fr);
    gap: 20px;
}

.control-card,
.stats-card,
.planner-card,
.history-card,
.diagnostics-card {
    padding: 24px;
}

.support-hint {
    margin: 0;
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--surface-muted);
}

.ring {
    width: 190px;
    aspect-ratio: 1;
    margin: 20px auto 0;
    border-radius: 50%;
    border: 16px solid rgba(24, 49, 79, 0.12);
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.98), rgba(247, 250, 253, 0.9));
    color: var(--text);
    display: grid;
    place-items: center;
    text-align: center;
    padding: 18px;
    font-weight: 700;
    line-height: 1.35;
    box-shadow: inset 0 0 0 1px rgba(24, 49, 79, 0.04);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.ring:hover:not(:disabled) {
    transform: scale(1.03);
}

.ring.active {
    border-color: var(--accent);
    background: radial-gradient(circle at center, rgba(255, 255, 255, 1), rgba(31, 143, 95, 0.12));
    box-shadow: 0 16px 28px rgba(31, 143, 95, 0.16);
}

.ring.active.fallback {
    border-color: var(--warning);
    background: radial-gradient(circle at center, rgba(255, 255, 255, 1), rgba(199, 111, 0, 0.12));
}

.ring.active.infinite {
    border-color: var(--highlight);
    background: radial-gradient(circle at center, rgba(255, 255, 255, 1), rgba(39, 93, 173, 0.14));
}

.status,
.current-step,
.message,
.error,
.time-remaining,
.session-meta {
    text-align: center;
}

.status {
    margin: 18px 0 0;
    font-size: 1.12rem;
    font-weight: 700;
}

.session-meta,
.current-step {
    margin: 8px 0 0;
}

.message,
.error {
    min-height: 1.4rem;
    margin: 10px 0 0;
}

.error {
    color: var(--danger);
    font-weight: 700;
}

.time-remaining {
    margin: 12px 0 0;
    color: var(--danger);
    font-size: 1.06rem;
    font-weight: 700;
}

.progress-container {
    width: 100%;
    height: 12px;
    margin-top: 14px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(24, 49, 79, 0.1);
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #62ba8f);
    transition: width 0.2s linear;
}

.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.stat-box {
    padding: 16px;
    border-radius: 20px;
    background: var(--surface-muted);
    border: 1px solid rgba(24, 49, 79, 0.06);
}

.stat-label {
    display: block;
    color: var(--muted);
    font-size: 0.92rem;
}

.stat-value {
    display: block;
    margin-top: 6px;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.card-heading {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: start;
}

.card-heading p {
    margin: 0;
    max-width: 38rem;
}

.mode-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.mode-tab {
    background: linear-gradient(135deg, #dfe8f5, #c8d7ec);
    color: var(--text);
}

.mode-tab.active {
    background: linear-gradient(135deg, var(--highlight), #1f4d8f);
    color: #ffffff;
}

.mode-panels {
    margin-top: 18px;
    display: grid;
    gap: 14px;
}

.mode-panel {
    display: none;
    padding: 18px;
    border-radius: 20px;
    background: var(--surface-muted);
}

.mode-panel.active {
    display: block;
    animation: rise-in 0.22s ease;
}

.mode-panel h3 {
    margin: 0 0 12px;
}

.preset-buttons,
.field-grid,
.preferences-grid,
.planner-footer,
.sequence-builder {
    display: grid;
    gap: 12px;
}

.preset-buttons {
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
}

.preset-button {
    background: linear-gradient(135deg, #ffffff, #eff5fb);
    color: var(--text);
    border: 1px solid rgba(24, 49, 79, 0.08);
}

.preset-button.selected {
    background: linear-gradient(135deg, var(--accent-soft), rgba(31, 143, 95, 0.2));
    box-shadow: 0 0 0 2px rgba(31, 143, 95, 0.18);
}

.field-row {
    display: grid;
    gap: 8px;
}

.field-row label {
    font-weight: 600;
}

.field-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compound-input {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px;
}

.sequence-builder {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sequence-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    display: grid;
    gap: 10px;
}

.sequence-item {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    padding: 12px 14px;
    border-radius: 16px;
    background: #ffffff;
    border: 1px solid rgba(24, 49, 79, 0.08);
}

.sequence-item strong {
    display: block;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--surface-muted);
}

.toggle input {
    width: auto;
}

.preferences-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 18px;
}

.planner-footer {
    grid-template-columns: 1fr auto;
    align-items: center;
    margin-top: 18px;
}

.plan-summary {
    margin: 0;
}

.history-list {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.history-item {
    padding: 16px;
    border-radius: 18px;
    background: var(--surface-muted);
    border: 1px solid rgba(24, 49, 79, 0.08);
}

.history-item p,
.history-item h3 {
    margin: 0;
}

.history-item h3 {
    font-size: 1rem;
}

.history-item .history-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.92rem;
}

.diagnostics-grid {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: 10px 14px;
    margin-top: 16px;
}

.diagnostics-grid dt {
    font-weight: 700;
}

.diagnostics-grid dd {
    margin: 0;
    color: var(--muted);
    word-break: break-word;
}

.fallback-video {
    position: fixed;
    width: 1px;
    height: 1px;
    opacity: 0.001;
    pointer-events: none;
    bottom: 0;
    right: 0;
}

[hidden] {
    display: none !important;
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .hero-card,
    .status-grid,
    .planner-footer,
    .field-grid,
    .sequence-builder,
    .preferences-grid {
        grid-template-columns: 1fr;
    }

    .hero-card {
        align-items: stretch;
    }

    .hero-actions {
        justify-items: stretch;
    }

    .card-heading {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    body {
        padding: 16px;
    }

    .hero-card,
    .control-card,
    .stats-card,
    .planner-card,
    .history-card,
    .diagnostics-card {
        padding: 18px;
        border-radius: 22px;
    }

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

    .ring {
        width: 164px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
        transition-delay: 0ms !important;
    }
}

@media (prefers-contrast: more) {
    :root {
        --border: rgba(24, 49, 79, 0.28);
    }

    .support-hint,
    .stat-box,
    .mode-panel,
    .toggle,
    .history-item {
        border: 1px solid var(--border);
    }
}