:root {
    --bg: #f4f1ea;
    --paper: #fffdf8;
    --ink: #1f1c18;
    --muted: #6b6256;
    --accent: #006d77;
    --accent-strong: #00575f;
    --danger: #b42318;
    --success: #027a48;
    --line: #d6d0c4;
    --radius: 14px;
    --shadow: 0 10px 32px rgba(26, 24, 20, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at top right, rgba(0, 109, 119, 0.1) 0%, transparent 28%),
        radial-gradient(circle at left top, rgba(230, 197, 123, 0.18) 0%, transparent 30%),
        linear-gradient(180deg, #f7f4ee 0%, #f1ece2 100%);
    min-height: 100vh;
}

.page {
    width: min(1040px, 92vw);
    margin: 0 auto;
    padding: 34px 0 46px;
}

.masthead {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(247, 244, 238, 0.84);
    border-bottom: 1px solid rgba(214, 208, 196, 0.7);
}

.masthead-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    padding: 18px 0 16px;
}

.brand-mark {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    color: var(--ink);
    text-decoration: none;
}

.brand-mark strong {
    font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.brand-kicker {
    color: var(--muted);
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.site-nav a,
.text-link {
    color: var(--accent-strong);
    text-decoration: none;
    font-weight: 700;
}

.site-nav a {
    position: relative;
    padding-bottom: 4px;
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    opacity: 0;
    transform: scaleX(0.5);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.site-nav a:hover::after {
    opacity: 1;
    transform: scaleX(1);
}

.site-nav a.is-current::after,
.site-nav a[aria-current="page"]::after {
    opacity: 1;
    transform: scaleX(1);
}

.site-nav a.is-current,
.site-nav a[aria-current="page"] {
    color: var(--ink);
}

.site-nav a:hover,
.text-link:hover {
    text-decoration: underline;
}

.hero {
    margin-bottom: 22px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.13em;
    font-size: 0.76rem;
    color: var(--accent);
    font-weight: 700;
    margin: 0 0 8px;
}

h1 {
    margin: 0;
    font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
    font-size: clamp(2rem, 3.4vw, 2.8rem);
    line-height: 1.1;
}

.subtitle {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 1.02rem;
}

.hero-links {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.panel {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: clamp(16px, 2.2vw, 28px);
}

.form label {
    display: block;
    font-size: 0.93rem;
    font-weight: 600;
    margin-bottom: 8px;
}

textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 11px;
    padding: 12px;
    font-family: "JetBrains Mono", "Consolas", monospace;
    font-size: 0.86rem;
    line-height: 1.5;
    resize: vertical;
    background: #fff;
    color: #151311;
}

textarea:focus {
    outline: 2px solid color-mix(in srgb, var(--accent) 36%, transparent);
    border-color: var(--accent);
}

.options {
    margin: 12px 0 4px;
}

.mode-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0 0 12px;
}

.mode-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    min-height: 108px;
    text-align: left;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(246, 242, 235, 0.96) 100%);
    color: var(--ink);
    box-shadow: 0 8px 22px rgba(26, 24, 20, 0.05);
}

.mode-card:hover {
    border-color: color-mix(in srgb, var(--accent) 44%, var(--line));
    color: var(--ink);
}

.mode-card:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent) 38%, transparent);
    outline-offset: 2px;
}

.mode-card.is-active {
    border-color: var(--accent);
    background:
        linear-gradient(180deg, rgba(0, 109, 119, 0.09) 0%, rgba(255, 253, 248, 0.98) 100%);
    box-shadow: 0 14px 28px rgba(0, 109, 119, 0.14);
}

.mode-card-title {
    font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
    font-size: 1rem;
    font-weight: 700;
}

.mode-card-copy {
    color: var(--muted);
    font-size: 0.84rem;
    line-height: 1.45;
}

.checkbox-wrap {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--muted);
}

.actions {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

button {
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 10px 15px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

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

button[type="submit"] {
    background: var(--accent);
    color: #fff;
}

button[type="submit"]:hover {
    background: var(--accent-strong);
}

button.ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--line);
}

button.ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.notice {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid;
    font-size: 0.88rem;
    font-weight: 600;
}

.notice.error {
    background: #fef2f2;
    color: var(--danger);
    border-color: #fecaca;
}

.notice.success {
    background: #ecfdf3;
    color: var(--success);
    border-color: #b7ebc6;
}

.output-wrap {
    margin-top: 18px;
}

.output-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.output-head h2 {
    margin: 0;
    font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
    font-size: 1.05rem;
}

.output-actions {
    display: flex;
    gap: 8px;
}

.footnote {
    text-align: center;
    margin-top: 18px;
    color: var(--muted);
    font-size: 0.86rem;
}

.seo-content h2,
.mini-card h3,
.content-block h2 {
    font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
}

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

.mini-card,
.content-block,
.faq-item,
.example-card {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
}

.mini-card p,
.content-block p,
.faq-item p,
.example-card p {
    color: var(--muted);
    line-height: 1.6;
}

.faq-list,
.example-grid {
    display: grid;
    gap: 14px;
}

.faq-item h2,
.example-card h2 {
    margin-top: 0;
    font-size: 1.1rem;
}

.example-code {
    display: block;
    margin-top: 10px;
    padding: 14px;
    background: #171512;
    color: #f8f3eb;
    border-radius: 12px;
    overflow-x: auto;
    font-family: "JetBrains Mono", "Consolas", monospace;
    font-size: 0.83rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

@media (max-width: 760px) {
    .mode-cards {
        grid-template-columns: 1fr;
    }

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

    .actions,
    .output-head,
    .output-actions {
        flex-wrap: wrap;
    }
}