@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap');

:root {
    color-scheme: light;
    --bg: #f7e9d5;
    --bg-2: #f2dfc6;
    --panel: #fff6ea;
    --panel-strong: #ffeccf;
    --ink: #17120f;
    --muted: #5e4d40;
    --muted-soft: #8a7361;
    --accent: #e46e2e;
    --accent-2: #d94f2a;
    --accent-3: #a84f2a;
    --success: #2f855a;
    --danger: #bb3e2f;
    --warning: #c98211;
    --border: #17120f;
    --shadow: 8px 8px 0 #17120f;
    --shadow-sm: 5px 5px 0 #17120f;
    --radius: 18px;
    --radius-sm: 12px;
    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
    --transition: 180ms ease;
}

body[data-theme='dark'] {
    color-scheme: dark;
    --bg: #1d1714;
    --bg-2: #241d19;
    --panel: #2a221d;
    --panel-strong: #332822;
    --ink: #f9ecdd;
    --muted: #d3b9a2;
    --muted-soft: #b99d86;
    --accent: #ff9d5c;
    --accent-2: #ff7e4e;
    --accent-3: #ffb16e;
    --success: #60d394;
    --danger: #ff7b6f;
    --warning: #ffd166;
    --border: #f4dcc5;
    --shadow: 8px 8px 0 #f4dcc5;
    --shadow-sm: 5px 5px 0 #f4dcc5;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(228, 110, 46, 0.14), transparent 30%),
        radial-gradient(circle at top right, rgba(201, 130, 17, 0.16), transparent 28%),
        linear-gradient(135deg, var(--bg), var(--bg-2));
    color: var(--ink);
    font-family: var(--font-display);
    line-height: 1.5;
    overflow-x: hidden;
}

body::before,
body::after,
.backdrop {
    content: '';
    position: fixed;
    inset: auto;
    pointer-events: none;
    z-index: -1;
}

.backdrop-a {
    width: 22rem;
    height: 22rem;
    top: -6rem;
    left: -8rem;
    background: radial-gradient(circle, rgba(228, 110, 46, 0.18), transparent 62%);
}

.backdrop-b {
    width: 28rem;
    height: 28rem;
    right: -10rem;
    bottom: -8rem;
    background: radial-gradient(circle, rgba(201, 130, 17, 0.14), transparent 60%);
}

.app-shell {
    width: min(1600px, calc(100vw - 24px));
    margin: 0 auto;
    padding: 16px 0 28px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 16px 20px;
    margin-bottom: 16px;
    border: 4px solid var(--border);
    background: color-mix(in srgb, var(--panel) 88%, transparent);
    box-shadow: var(--shadow);
    border-radius: calc(var(--radius) + 2px);
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-mark {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border: 4px solid var(--border);
    background: linear-gradient(160deg, var(--accent), var(--accent-2));
    box-shadow: var(--shadow-sm);
    font-family: var(--font-mono);
    color: #fff7ef;
    font-weight: 700;
    font-size: 1.15rem;
}

.eyebrow {
    margin: 0 0 2px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 700;
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1 {
    font-size: clamp(1.75rem, 3vw, 2.6rem);
    line-height: 1;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.status-pill,
.icon-button,
.segmented,
.ghost-button,
.cheat-btn,
.saved-apply,
.saved-delete,
.case-remove {
    border: 4px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    min-height: 46px;
    padding: 0 14px;
    background: var(--success);
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.icon-button,
.ghost-button,
.segmented,
.cheat-btn,
.saved-apply,
.saved-delete,
.case-remove {
    min-height: 46px;
    padding: 0 14px;
    border-radius: 14px;
    background: var(--panel);
    color: var(--ink);
    font-family: var(--font-display);
    font-weight: 700;
    cursor: pointer;
}

.icon-button:hover,
.ghost-button:hover,
.segmented:hover,
.cheat-btn:hover,
.saved-apply:hover,
.saved-delete:hover,
.case-remove:hover {
    transform: translate(-2px, -2px);
    box-shadow: 12px 12px 0 var(--border);
}

.icon-button.accent,
.ghost-button.accent,
.cheat-btn.active,
.segmented.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
}

.icon-button.danger {
    background: #ffcfbf;
}

.dashboard {
    display: grid;
    grid-template-columns: minmax(300px, 340px) minmax(420px, 1fr) minmax(300px, 340px);
    gap: 16px;
    align-items: start;
}

.panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.column {
    min-width: 0;
}

.left-column,
.right-column {
    position: sticky;
    top: 16px;
    max-height: calc(100vh - 32px);
    overflow: auto;
    padding-right: 2px;
}

.card {
    border: 4px solid var(--border);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: var(--shadow);
    padding: 18px;
}

.hero-card {
    background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 78%, var(--panel-strong)), var(--panel));
}

.grow {
    flex: 1;
}

.card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.card-head.compact {
    align-items: center;
}

.card-kicker {
    margin-bottom: 4px;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    color: var(--muted);
    font-weight: 700;
}

.card h2 {
    font-size: clamp(1.15rem, 1.4vw, 1.5rem);
}

.micro-copy,
.hint-row {
    font-family: var(--font-mono);
    color: var(--muted-soft);
    font-size: 0.8rem;
}

.hint-row {
    margin-top: 12px;
}

.hint-row.small {
    margin-top: 10px;
    font-size: 0.76rem;
}

.language-toggle {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.segmented {
    font-size: 0.84rem;
}

.field-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--muted);
}

.field-label.compact-label {
    margin-bottom: 6px;
}

.regex-shell,
.field-input,
.result-box,
.saved-item,
.case-item,
.match-item,
.explanation-item,
.summary-card {
    border: 4px solid var(--border);
    border-radius: 16px;
    background: color-mix(in srgb, var(--panel) 80%, white 20%);
}

.regex-shell {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
}

.slash,
.flag-readout {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.05rem;
}

.slash {
    color: var(--accent-2);
}

.flag-readout {
    color: var(--accent-3);
}

.regex-input,
.field-input,
.result-text {
    width: 100%;
    font: inherit;
    color: var(--ink);
    outline: none;
}

.regex-input,
.field-input {
    border: 0;
    background: transparent;
    min-width: 0;
    font-family: var(--font-mono);
}

.regex-input {
    font-size: 1.08rem;
    padding: 6px 4px;
}

.field-input {
    min-height: 50px;
    padding: 12px 14px;
}

.field-input.mono,
.result-text,
.case-text,
.case-expect,
.saved-apply,
.saved-delete,
.metric span,
.status-pill,
.flag-readout,
.tiny-chip,
.micro-copy,
.hint-row,
.match-meta,
.match-group,
.case-status,
.performance-note {
    font-family: var(--font-mono);
}

.flag-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.flag-chip {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.flag-chip input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.flag-chip span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    min-height: 42px;
    border: 4px solid var(--border);
    border-radius: 14px;
    background: var(--panel-strong);
    box-shadow: var(--shadow-sm);
    font-family: var(--font-mono);
    font-weight: 700;
}

.flag-chip input:checked + span {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
}

.error-banner {
    margin-top: 12px;
    padding: 12px 14px;
    border: 4px solid var(--border);
    border-radius: 14px;
    background: #ffd0c5;
    color: #3f140f;
    font-weight: 700;
}

.cheat-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cheat-btn {
    text-align: left;
    padding: 12px 14px;
    line-height: 1.15;
}

.saved-list,
.match-list,
.explanation-list,
.case-list {
    display: grid;
    gap: 12px;
}

.saved-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 12px;
}

.saved-apply,
.saved-delete {
    min-height: 44px;
}

.saved-apply {
    text-align: left;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.saved-delete {
    background: #ffd8cc;
}

.text-shell {
    position: relative;
    min-height: 340px;
    border: 4px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    background: #fffdf8;
}

.highlight-layer,
.text-input {
    position: absolute;
    inset: 0;
    padding: 18px;
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}

.highlight-layer {
    overflow: auto;
    color: var(--ink);
    user-select: none;
}

.highlight-layer .match-hit {
    color: var(--ink);
    background: rgba(228, 110, 46, 0.28);
    border-bottom: 3px solid var(--accent-2);
    border-radius: 6px;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

.text-input {
    resize: vertical;
    min-height: 340px;
    border: 0;
    background: transparent;
    color: transparent;
    caret-color: var(--ink);
    z-index: 1;
}

.text-input::selection {
    background: rgba(228, 110, 46, 0.32);
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.metric {
    border: 4px solid var(--border);
    border-radius: 16px;
    background: var(--panel-strong);
    box-shadow: var(--shadow-sm);
    padding: 12px;
    text-align: center;
}

.metric span {
    display: block;
    font-size: clamp(1.2rem, 2vw, 1.7rem);
    font-weight: 700;
}

.metric small {
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 700;
}

.result-box {
    padding: 14px;
    margin-top: 8px;
}

.result-title {
    margin-bottom: 10px;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
    font-weight: 700;
}

.result-text {
    margin: 0;
    min-height: 120px;
    white-space: pre-wrap;
    word-break: break-word;
}

.case-item,
.match-item,
.explanation-item {
    padding: 14px;
    background: color-mix(in srgb, var(--panel) 88%, var(--panel-strong));
}

.case-row {
    margin-bottom: 10px;
}

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

.case-expect {
    width: 100%;
}

.case-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.case-status {
    font-weight: 700;
}

.case-status.pass {
    color: var(--success);
}

.case-status.fail {
    color: var(--danger);
}

.case-status.pending {
    color: var(--muted);
}

.match-list,
.explanation-list,
.saved-list,
.case-list {
    max-height: none;
}

.empty-state {
    padding: 16px;
    border: 4px dashed color-mix(in srgb, var(--border) 50%, transparent);
    border-radius: 16px;
    color: var(--muted);
    font-family: var(--font-mono);
}

.match-item {
    display: grid;
    gap: 10px;
}

.match-head,
.explain-head {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.match-badge,
.token-badge,
.tiny-chip {
    display: inline-flex;
    align-items: center;
    border: 4px solid var(--border);
    border-radius: 999px;
    background: var(--panel-strong);
    padding: 6px 10px;
    font-size: 0.76rem;
    font-weight: 700;
}

.match-snippet,
.match-groups,
.explain-text {
    font-family: var(--font-mono);
}

.match-snippet {
    padding: 10px 12px;
    border: 4px solid var(--border);
    border-radius: 14px;
    background: rgba(228, 110, 46, 0.12);
    word-break: break-word;
}

.match-groups {
    display: grid;
    gap: 8px;
}

.match-group {
    padding: 8px 10px;
    border: 4px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.35);
}

.explanation-item {
    display: grid;
    gap: 10px;
}

.token-badge {
    width: fit-content;
    background: rgba(201, 130, 17, 0.14);
}

.explain-text {
    color: var(--muted);
}

.summary-card {
    padding: 14px;
}

.performance-note {
    color: var(--muted);
    margin-top: 8px;
}

.field-input::placeholder,
.regex-input::placeholder,
.text-input::placeholder {
    color: var(--muted-soft);
}

.field-input:focus,
.regex-input:focus,
.text-input:focus {
    outline: none;
}

.mono {
    font-family: var(--font-mono);
}

.tiny-chip {
    background: rgba(255, 232, 208, 0.8);
    color: var(--muted);
}

.chip-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.ghost-button {
    background: var(--panel-strong);
}

body[data-theme='dark'] .field-input,
body[data-theme='dark'] .result-box,
body[data-theme='dark'] .regex-shell,
body[data-theme='dark'] .saved-item,
body[data-theme='dark'] .case-item,
body[data-theme='dark'] .match-item,
body[data-theme='dark'] .explanation-item,
body[data-theme='dark'] .metric,
body[data-theme='dark'] .text-shell,
body[data-theme='dark'] .topbar,
body[data-theme='dark'] .card,
body[data-theme='dark'] .status-pill,
body[data-theme='dark'] .icon-button,
body[data-theme='dark'] .segmented,
body[data-theme='dark'] .ghost-button,
body[data-theme='dark'] .cheat-btn,
body[data-theme='dark'] .saved-apply,
body[data-theme='dark'] .saved-delete,
body[data-theme='dark'] .case-remove,
body[data-theme='dark'] .flag-chip span,
body[data-theme='dark'] .tiny-chip,
body[data-theme='dark'] .match-badge,
body[data-theme='dark'] .token-badge {
    background: color-mix(in srgb, var(--panel) 88%, black 12%);
}

body[data-theme='dark'] .highlight-layer .match-hit {
    background: rgba(255, 157, 92, 0.3);
    border-bottom-color: var(--accent);
}

@media (max-width: 1180px) {
    .dashboard {
        grid-template-columns: 1fr;
    }

    .left-column,
    .right-column {
        position: static;
        max-height: none;
        overflow: visible;
        padding-right: 0;
    }

    .topbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar {
        justify-content: flex-start;
    }
}

@media (max-width: 760px) {
    .app-shell {
        width: min(100vw - 14px, 1600px);
        padding-top: 8px;
    }

    .topbar,
    .card {
        padding: 14px;
    }

    .regex-shell {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }

    .regex-shell .flag-readout {
        grid-column: 1 / -1;
        justify-self: end;
        margin-top: 6px;
    }

    .cheat-grid,
    .metrics-row {
        grid-template-columns: 1fr;
    }

    .saved-item {
        grid-template-columns: 1fr;
    }

    .case-footer {
        flex-direction: column;
        align-items: stretch;
    }
}