/* ==================== Claude Design Tokens ==================== */
:root,
[data-theme="light"] {
    --c-bg: #f5f4ed;
    --c-surface: #faf9f5;
    --c-surface-2: #f0eee6;
    --c-surface-3: #e8e6dc;
    --c-border: #e8e6dc;
    --c-border-hover: #d1cfc5;
    --c-text: #141413;
    --c-text-2: #5e5d59;
    --c-text-3: #87867f;
    --c-primary: #c96442;
    --c-primary-hover: #b85d3d;
    --c-primary-bg: rgba(201, 100, 66, 0.10);
    --c-primary-border: rgba(201, 100, 66, 0.28);
    --c-green: #6f7f4f;
    --c-green-bg: rgba(111, 127, 79, 0.12);
    --c-amber: #b77935;
    --c-amber-bg: rgba(183, 121, 53, 0.12);
    --c-red: #b53333;
    --c-red-bg: rgba(181, 51, 51, 0.08);
    --c-focus: #3898ec;
    --c-ring: #4d4c48;
    --c-elevated-shadow: rgba(20, 20, 19, 0.05) 0 4px 24px;
    --font: Arial, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-serif: Georgia, "Times New Roman", serif;
    --font-mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;
    --r: 12px;
    --r-sm: 8px;
    --r-lg: 16px;
    --topbar-bg: rgba(245, 244, 237, 0.88);
}

[data-theme="dark"] {
    --c-bg: #141413;
    --c-surface: #30302e;
    --c-surface-2: #252522;
    --c-surface-3: #3d3d3a;
    --c-border: #45443f;
    --c-border-hover: #625f58;
    --c-text: #faf9f5;
    --c-text-2: #d1cfc5;
    --c-text-3: #b0aea5;
    --c-primary: #d97757;
    --c-primary-hover: #c96442;
    --c-primary-bg: rgba(201, 100, 66, 0.16);
    --c-primary-border: rgba(217, 119, 87, 0.34);
    --c-green: #8a9b68;
    --c-green-bg: rgba(138, 155, 104, 0.16);
    --c-amber: #d29a4a;
    --c-amber-bg: rgba(210, 154, 74, 0.16);
    --c-red: #d36b5f;
    --c-red-bg: rgba(179, 51, 51, 0.16);
    --c-ring: #d1cfc5;
    --c-elevated-shadow: rgba(0, 0, 0, 0.20) 0 4px 24px;
    --topbar-bg: rgba(20, 20, 19, 0.88);
}

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

body {
    min-height: 100vh;
    background: var(--c-bg);
    color: var(--c-text);
    font-family: var(--font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover { text-decoration: underline; }

/* ==================== Typography ==================== */
h1, h2, h3 {
    color: var(--c-text);
    font-family: var(--font-serif);
    font-weight: 500;
    letter-spacing: 0;
}

/* ==================== Form Elements ==================== */
.form-group { margin-bottom: 20px; }

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--c-text-2);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.12px;
}

input, textarea, select {
    width: 100%;
    padding: 11px 14px;
    color: var(--c-text);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

input::placeholder, textarea::placeholder {
    color: var(--c-text-3);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--c-focus);
    box-shadow: 0 0 0 3px rgba(56, 152, 236, 0.16);
}

select {
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2387867f' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

textarea {
    min-height: 100px;
    max-height: 50vh;
    resize: none;
    overflow-y: hidden;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
}

.row { display: flex; gap: 16px; }
.row > .form-group { flex: 1; margin-bottom: 0; }

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 18px;
    color: #faf9f5;
    background: var(--c-primary);
    border: 1px solid var(--c-primary);
    border-radius: var(--r);
    box-shadow: var(--c-primary) 0 0 0 0, var(--c-primary) 0 0 0 1px;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.45;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.btn:hover {
    background: var(--c-primary-hover);
    border-color: var(--c-primary-hover);
    text-decoration: none;
}

.btn:active { transform: translateY(1px); }
.btn-success { background: var(--c-green); border-color: var(--c-green); box-shadow: var(--c-green) 0 0 0 1px; }
.btn-danger { background: var(--c-red); border-color: var(--c-red); box-shadow: var(--c-red) 0 0 0 1px; }
.btn-sm { min-height: 34px; padding: 7px 12px; font-size: 12px; }
.btn-xs { min-height: 28px; padding: 5px 9px; font-size: 11px; }

.btn-outline {
    color: var(--c-text);
    background: var(--c-surface-3);
    border-color: var(--c-ring);
    box-shadow: var(--c-surface-3) 0 0 0 0, var(--c-ring) 0 0 0 1px;
}

.btn-outline:hover {
    color: var(--c-text);
    background: var(--c-surface-2);
    border-color: var(--c-border-hover);
}

.btn-block { width: 100%; }

/* ==================== Cards ==================== */
.card {
    padding: 24px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    box-shadow: var(--c-elevated-shadow);
}

/* ==================== Utilities ==================== */
small {
    display: block;
    margin-top: 6px;
    color: var(--c-text-3);
    font-size: 12px;
}

small code {
    padding: 2px 6px;
    color: var(--c-primary);
    background: var(--c-surface-2);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
}

@media (max-width: 768px) {
    .row { flex-direction: column; gap: 0; }
    .row > .form-group { margin-bottom: 16px; }
    .form-group { margin-bottom: 16px; }
    .form-label { font-size: 12px; margin-bottom: 6px; }

    input, select {
        padding: 12px 14px;
        font-size: 16px;
    }

    textarea {
        min-height: 100px;
        padding: 12px 14px;
        font-size: 16px;
    }

    .btn {
        min-height: 44px;
        padding: 12px 20px;
        font-size: 14px;
    }
    .btn-sm, .btn-xs { min-height: 38px; padding: 9px 12px; }

    small { font-size: 11px; margin-top: 4px; }
}

@media (max-width: 480px) {
    input, select { padding: 11px 12px; font-size: 16px; }
    textarea { min-height: 80px; padding: 11px 12px; }
    .btn { padding: 11px 16px; font-size: 13px; }
    .form-label { font-size: 11px; }
}