:root {
    color-scheme: light;
    --bg-main: #f6f2e8;
    --bg-end: #f1ecde;
    --bg-layer: #ece6d8;
    --surface: #fffcf5;
    --surface-strong: #fff9ec;
    --ink: #1e2433;
    --ink-soft: #5c6474;
    --line: #d8cfbc;
    --teal: #0f766e;
    --teal-strong: #0a5f59;
    --teal-on: #f7fffe;
    --amber: #c97817;
    --rose: #b23a48;
    --mono: "IBM Plex Mono", "Courier New", monospace;
    --body: "Public Sans", "Segoe UI", sans-serif;
    --display: "Fraunces", Georgia, serif;
    --radius-lg: 22px;
    --radius-md: 14px;
    --shadow-soft: 0 18px 45px rgba(30, 36, 51, 0.08);
    --focus-ring: 0 0 0 3px rgba(15, 118, 110, 0.28);
    --body-glow-1: rgba(201, 120, 23, 0.17);
    --body-glow-2: rgba(15, 118, 110, 0.22);
    --dot-color: rgba(30, 36, 51, 0.045);
    --dot-opacity: 0.35;
    --nav-border: rgba(216, 207, 188, 0.88);
    --nav-bg: linear-gradient(170deg, rgba(255, 252, 245, 0.93), rgba(255, 248, 235, 0.86));
    --nav-hover-bg: rgba(201, 120, 23, 0.08);
    --nav-active-border: rgba(15, 118, 110, 0.32);
    --nav-active-bg: rgba(15, 118, 110, 0.14);
    --nav-active-color: var(--teal-strong);
    --card-border: rgba(216, 207, 188, 0.9);
    --card-bg: linear-gradient(165deg, rgba(255, 252, 245, 0.96), rgba(255, 248, 235, 0.92));
    --input-bg: rgba(255, 255, 255, 0.9);
    --btn-soft-bg: rgba(201, 120, 23, 0.12);
    --btn-soft-border: rgba(201, 120, 23, 0.24);
    --btn-soft-color: #7a4206;
    --btn-soft-hover: rgba(201, 120, 23, 0.2);
    --btn-ghost-bg: rgba(30, 36, 51, 0.06);
    --btn-ghost-border: rgba(30, 36, 51, 0.14);
    --btn-ghost-hover: rgba(30, 36, 51, 0.11);
    --preview-bg: #ede5d4;
    --preview-check: rgba(255, 255, 255, 0.35);
    --preview-dash: rgba(30, 36, 51, 0.24);
    --shadow-box-bg: linear-gradient(140deg, #ffffff, #eff5f4);
    --element-border: rgba(30, 36, 51, 0.12);
    --code-bg: #18232a;
    --code-color: #dbfbf4;
    --code-border: rgba(30, 36, 51, 0.14);
    --field-bg: rgba(255, 255, 255, 0.8);
    --toast-bg: rgba(255, 253, 246, 0.96);
    --toast-border: rgba(15, 118, 110, 0.28);
    --toast-shadow: rgba(30, 36, 51, 0.17);
    --header-mobile-bg: rgba(246, 242, 232, 0.95);
    --backdrop-bg: rgba(20, 20, 20, 0.38);
    --noscript-border: rgba(178, 58, 72, 0.25);
    --noscript-bg: rgba(255, 236, 239, 0.72);
    --noscript-color: #77222d;
    --btn-primary-shadow: rgba(15, 118, 110, 0.22);
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg-main: #0f1419;
    --bg-end: #111921;
    --bg-layer: #161d26;
    --surface: #1c2530;
    --surface-strong: #22303e;
    --ink: #e2e8f0;
    --ink-soft: #8b9ab3;
    --line: #2a3a4e;
    --teal: #2dd4bf;
    --teal-strong: #5eead4;
    --teal-on: #042f2e;
    --amber: #f59e0b;
    --rose: #f87171;
    --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.35);
    --focus-ring: 0 0 0 3px rgba(45, 212, 191, 0.35);
    --body-glow-1: rgba(201, 120, 23, 0.08);
    --body-glow-2: rgba(45, 212, 191, 0.1);
    --dot-color: rgba(226, 232, 240, 0.03);
    --dot-opacity: 0.2;
    --nav-border: rgba(42, 58, 78, 0.7);
    --nav-bg: linear-gradient(170deg, rgba(28, 37, 48, 0.95), rgba(22, 29, 38, 0.9));
    --nav-hover-bg: rgba(245, 158, 11, 0.08);
    --nav-active-border: rgba(45, 212, 191, 0.3);
    --nav-active-bg: rgba(45, 212, 191, 0.1);
    --nav-active-color: var(--teal);
    --card-border: rgba(42, 58, 78, 0.7);
    --card-bg: linear-gradient(165deg, rgba(28, 37, 48, 0.96), rgba(22, 29, 38, 0.92));
    --input-bg: rgba(15, 20, 25, 0.6);
    --btn-soft-bg: rgba(245, 158, 11, 0.1);
    --btn-soft-border: rgba(245, 158, 11, 0.22);
    --btn-soft-color: #fbbf24;
    --btn-soft-hover: rgba(245, 158, 11, 0.18);
    --btn-ghost-bg: rgba(226, 232, 240, 0.06);
    --btn-ghost-border: rgba(226, 232, 240, 0.1);
    --btn-ghost-hover: rgba(226, 232, 240, 0.12);
    --preview-bg: #1a2332;
    --preview-check: rgba(255, 255, 255, 0.04);
    --preview-dash: rgba(226, 232, 240, 0.15);
    --shadow-box-bg: linear-gradient(140deg, #1e2a3a, #22303e);
    --element-border: rgba(226, 232, 240, 0.08);
    --code-bg: #0d1117;
    --code-color: #7ee8d4;
    --code-border: rgba(226, 232, 240, 0.08);
    --field-bg: rgba(15, 20, 25, 0.5);
    --toast-bg: rgba(28, 37, 48, 0.96);
    --toast-border: rgba(45, 212, 191, 0.3);
    --toast-shadow: rgba(0, 0, 0, 0.3);
    --header-mobile-bg: rgba(15, 20, 25, 0.95);
    --backdrop-bg: rgba(0, 0, 0, 0.5);
    --noscript-border: rgba(248, 113, 113, 0.25);
    --noscript-bg: rgba(127, 29, 29, 0.3);
    --noscript-color: #fca5a5;
    --btn-primary-shadow: rgba(45, 212, 191, 0.2);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: var(--body);
    color: var(--ink);
    background:
        radial-gradient(1000px 450px at 88% -10%, var(--body-glow-1), transparent 62%),
        radial-gradient(850px 520px at -12% 8%, var(--body-glow-2), transparent 58%),
        linear-gradient(180deg, var(--bg-main) 0%, var(--bg-end) 100%);
    padding: 1.3rem 1.5rem 2rem;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: radial-gradient(var(--dot-color) 0.5px, transparent 0.5px);
    background-size: 3px 3px;
    pointer-events: none;
    opacity: var(--dot-opacity);
    z-index: -1;
}

body.nav-open {
    overflow: hidden;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    max-width: 1400px;
    margin: 0 auto 1rem;
}

.brand-block {
    max-width: 860px;
}

.kicker {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-weight: 700;
    font-size: 0.7rem;
    color: var(--ink-soft);
}

.brand-block h1 {
    margin: 0.2rem 0 0;
    font-family: var(--display);
    font-size: clamp(2rem, 4.3vw, 3.3rem);
    line-height: 1;
    letter-spacing: 0.01em;
}

.tagline {
    margin: 0.8rem 0 0;
    font-size: 1rem;
    color: var(--ink-soft);
    max-width: 58ch;
}

.header-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    flex-shrink: 0;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
    background: var(--surface-strong);
    transform: translateY(-1px);
}

.theme-icon--light {
    display: none;
}

[data-theme="dark"] .theme-icon--light {
    display: block;
}

[data-theme="dark"] .theme-icon--dark {
    display: none;
}

.nav-toggle {
    display: none;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    border-radius: 999px;
    padding: 0.62rem 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
    background: var(--surface-strong);
    transform: translateY(-1px);
}

.nav-toggle:focus-visible,
.theme-toggle:focus-visible,
.btn:focus-visible,
.tool-nav__button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.app-shell {
    display: grid;
    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
    gap: 1rem;
    max-width: 1400px;
    margin: 0 auto;
    align-items: start;
}

.tool-nav {
    position: sticky;
    top: 0.9rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--radius-lg);
    background: var(--nav-bg);
    box-shadow: var(--shadow-soft);
    padding: 1rem;
    backdrop-filter: blur(5px);
}

.tool-nav__label {
    margin: 0.6rem 0 0.45rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--ink-soft);
}

.tool-nav__label:first-child {
    margin-top: 0;
}

.tool-nav__button {
    width: 100%;
    border: 1px solid transparent;
    border-radius: 12px;
    background: transparent;
    color: var(--ink);
    text-align: left;
    font-size: 0.93rem;
    padding: 0.64rem 0.74rem;
    margin-bottom: 0.42rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.tool-nav__button:hover {
    border-color: var(--line);
    background: var(--nav-hover-bg);
    transform: translateX(3px);
}

.tool-nav__button.is-active {
    border-color: var(--nav-active-border);
    background: var(--nav-active-bg);
    color: var(--nav-active-color);
}

.workspace {
    min-width: 0;
}

.tool-panel {
    display: none;
    animation: panel-in 0.32s ease;
}

.tool-panel.is-active {
    display: block;
}

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

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

.panel-head {
    margin-bottom: 1rem;
}

.panel-head h2 {
    margin: 0;
    font-family: var(--display);
    font-size: clamp(1.45rem, 2.9vw, 2.1rem);
}

.panel-head p {
    margin: 0.4rem 0 0;
    color: var(--ink-soft);
}

.panel-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 0.9rem;
}

.panel-stack {
    display: grid;
    gap: 0.9rem;
}

.card {
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    box-shadow: var(--shadow-soft);
    padding: 1rem 1rem 1.08rem;
}

.card h3 {
    margin: 0 0 0.85rem;
    font-size: 0.73rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-soft);
}

.controls-card {
    display: grid;
    gap: 0.55rem;
}

label {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--ink-soft);
}

input[type="range"] {
    width: 100%;
    margin: 0 0 0.55rem;
    accent-color: var(--teal);
}

input[type="number"],
input[type="text"],
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--input-bg);
    color: var(--ink);
    font-family: var(--body);
    font-size: 0.92rem;
    padding: 0.6rem 0.7rem;
}

textarea {
    min-height: 150px;
    resize: vertical;
    line-height: 1.55;
    font-family: var(--mono);
}

.short-textarea {
    min-height: 110px;
}

.tall-textarea {
    min-height: 280px;
}

input[type="color"] {
    width: 44px;
    min-width: 44px;
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    padding: 2px;
}

.inline-controls {
    display: grid;
    grid-template-columns: auto 50px auto minmax(84px, 120px);
    gap: 0.5rem;
    align-items: center;
}

.inline-controls.compact {
    grid-template-columns: auto 50px auto minmax(82px, 95px);
}

.check-row {
    display: inline-flex;
    gap: 0.45rem;
    align-items: center;
    cursor: pointer;
}

.check-row input {
    width: 16px;
    height: 16px;
    accent-color: var(--teal);
}

.preset-row,
.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.button-row.wrap {
    gap: 0.5rem;
}

.btn {
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.5rem 0.9rem;
    cursor: pointer;
    font-size: 0.83rem;
    font-weight: 700;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--teal);
    color: var(--teal-on);
    box-shadow: 0 10px 24px var(--btn-primary-shadow);
}

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

.btn-soft {
    background: var(--btn-soft-bg);
    border-color: var(--btn-soft-border);
    color: var(--btn-soft-color);
}

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

.btn-ghost {
    background: var(--btn-ghost-bg);
    border-color: var(--btn-ghost-border);
    color: var(--ink);
}

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

.preview-shell {
    min-height: 220px;
    border: 1px dashed var(--preview-dash);
    border-radius: 18px;
    display: grid;
    place-items: center;
    background:
        linear-gradient(45deg, var(--preview-check) 25%, transparent 25%),
        linear-gradient(-45deg, var(--preview-check) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--preview-check) 75%),
        linear-gradient(-45deg, transparent 75%, var(--preview-check) 75%),
        var(--preview-bg);
    background-size: 24px 24px;
    background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

.shadow-preview {
    width: clamp(110px, 18vw, 160px);
    aspect-ratio: 1;
    border-radius: 18px;
    background: var(--shadow-box-bg);
    border: 1px solid var(--element-border);
}

.gradient-preview {
    min-height: 220px;
    border-radius: 18px;
    border: 1px solid var(--element-border);
}

.border-radius-preview {
    width: clamp(120px, 20vw, 180px);
    aspect-ratio: 1;
    border: 1px solid var(--element-border);
}

.output-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.output-head h3 {
    margin: 0;
}

.code-block {
    margin: 0;
    border-radius: 16px;
    border: 1px solid var(--code-border);
    background: var(--code-bg);
    color: var(--code-color);
    font-family: var(--mono);
    font-size: 0.85rem;
    line-height: 1.58;
    padding: 0.9rem;
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 74px;
}

.inline-field {
    display: inline-flex;
    gap: 0.55rem;
    align-items: center;
    background: var(--field-bg);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.22rem 0.22rem 0.22rem 0.75rem;
    font-weight: 700;
    color: var(--ink-soft);
}

.inline-field select {
    width: auto;
    min-width: 74px;
    font-weight: 700;
    border-radius: 999px;
    padding-inline: 0.7rem;
}

.status-message {
    min-height: 1.4rem;
    margin: 0 0 0.55rem;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--ink-soft);
}

.status-message[data-state="success"] {
    color: var(--teal-strong);
}

.status-message[data-state="error"] {
    color: var(--rose);
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.7rem;
    align-items: end;
}

.option-grid label {
    display: grid;
    gap: 0.38rem;
}

.muted-note {
    margin: 0.7rem 0 0;
    color: var(--ink-soft);
    font-size: 0.85rem;
}

.toast {
    position: fixed;
    right: 1.15rem;
    bottom: 1.15rem;
    border-radius: 999px;
    border: 1px solid var(--toast-border);
    background: var(--toast-bg);
    color: var(--teal-strong);
    box-shadow: 0 10px 25px var(--toast-shadow);
    padding: 0.55rem 0.95rem;
    font-size: 0.85rem;
    font-weight: 700;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.noscript-message {
    margin: 1rem auto 0;
    max-width: 1100px;
    padding: 1rem;
    border-radius: 14px;
    border: 1px solid var(--noscript-border);
    background: var(--noscript-bg);
    color: var(--noscript-color);
}

.nav-backdrop {
    display: none;
}

.nav-backdrop[hidden] {
    display: none !important;
}

@media (max-width: 1160px) {
    .panel-grid {
        grid-template-columns: 1fr;
    }

    .panel-stack {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 900px) {
    body {
        padding: 1rem 0.8rem 1.3rem;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 30;
        padding: 0.4rem;
        border-radius: 16px;
        background: var(--header-mobile-bg);
        backdrop-filter: blur(5px);
    }

    .nav-toggle {
        display: inline-flex;
        align-items: center;
    }

    .app-shell {
        grid-template-columns: 1fr;
    }

    .tool-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: min(86vw, 320px);
        max-height: 100dvh;
        overflow-y: auto;
        transform: translateX(-108%);
        transition: transform 0.23s ease;
        z-index: 80;
        border-radius: 0 18px 18px 0;
        padding-top: 1.1rem;
    }

    .tool-nav.is-open {
        transform: translateX(0);
    }

    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: var(--backdrop-bg);
        border: 0;
        z-index: 70;
    }

    .inline-controls,
    .inline-controls.compact {
        grid-template-columns: auto 50px auto minmax(70px, 1fr);
    }

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

@media (max-width: 560px) {
    .card {
        padding: 0.86rem;
    }

    .panel-head h2 {
        font-size: clamp(1.35rem, 7vw, 1.75rem);
    }

    .output-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .toast {
        left: 0.8rem;
        right: 0.8rem;
        text-align: center;
    }
}