/* Walking Cat — TechTools dark theme with a warm "cat" accent */
:root {
    --primary-bg: #0a0a0f;
    --secondary-bg: #12121a;
    --card-bg: #16161f;
    --card-bg-hover: #1c1c28;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);

    --accent-primary: #fb923c;     /* warm amber */
    --accent-secondary: #f472b6;   /* playful rose */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --accent-soft: rgba(251, 146, 60, 0.14);

    --text-primary: #f5f6fa;
    --text-secondary: rgba(245, 246, 250, 0.72);
    --text-muted: rgba(245, 246, 250, 0.45);

    --success: #10b981;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.25rem;

    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background:
        radial-gradient(1100px 520px at 85% -10%, rgba(251, 146, 60, 0.10), transparent 60%),
        radial-gradient(900px 480px at 5% 0%, rgba(244, 114, 182, 0.08), transparent 55%),
        var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.app { min-height: calc(100vh - var(--tt-topnav-h, 56px)); display: flex; flex-direction: column; }

/* Header */
.header {
    display: flex; justify-content: space-between; align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(18, 18, 26, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: var(--tt-topnav-h, 56px); z-index: 20;
}
.header h1 {
    font-size: 1.25rem; font-weight: 700;
    display: flex; align-items: center; gap: var(--spacing-sm);
}
.header h1 i {
    background: var(--accent-gradient);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.back-btn {
    display: inline-flex; align-items: center; gap: var(--spacing-xs);
    padding: 0.6rem 0.9rem; min-height: 44px;
    background: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-secondary);
    text-decoration: none; font-size: 0.875rem; white-space: nowrap;
    transition: var(--transition-fast);
}
.back-btn:hover { background: var(--accent-soft); color: var(--text-primary); border-color: var(--accent-primary); }

/* Main */
.main { flex: 1; width: 100%; max-width: 980px; margin: 0 auto; padding: var(--spacing-lg) var(--spacing-md) 7rem; }

/* Hero */
.hero { text-align: center; padding: var(--spacing-lg) 0 var(--spacing-xl); }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 0.4rem;
    font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
    color: var(--accent-primary);
    background: var(--accent-soft); border: 1px solid rgba(251, 146, 60, 0.25);
    padding: 0.3rem 0.7rem; border-radius: 999px;
}
.hero-title {
    font-size: clamp(1.6rem, 5vw, 2.6rem); font-weight: 800; line-height: 1.15;
    margin: var(--spacing-md) auto var(--spacing-sm); max-width: 18ch;
}
.hero-sub { color: var(--text-secondary); max-width: 56ch; margin: 0 auto; font-size: 1.02rem; }
.hero-hint { color: var(--text-muted); font-size: 0.9rem; margin-top: var(--spacing-md); }

/* Layout: two panels */
.layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--spacing-md); }

.panel {
    min-width: 0; /* allow the grid item to shrink so wide content (code box) can't blow out the layout */
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}
.panel-title { font-size: 1.05rem; font-weight: 700; display: flex; align-items: center; gap: 0.55rem; margin-bottom: var(--spacing-md); }
.panel-title i { color: var(--accent-primary); }
.panel-sub { color: var(--text-secondary); font-size: 0.92rem; margin-bottom: var(--spacing-sm); }
.panel-foot { color: var(--text-muted); font-size: 0.85rem; margin-top: var(--spacing-md); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: rgba(255,255,255,0.07); padding: 0.05em 0.4em; border-radius: 6px; font-size: 0.9em; }

/* Fields */
.field { margin-bottom: var(--spacing-lg); }
.field:last-child { margin-bottom: 0; }
.field-label { display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 0.9rem; margin-bottom: var(--spacing-sm); }
.field-value { color: var(--accent-primary); font-variant-numeric: tabular-nums; }
.field-help { color: var(--text-muted); font-size: 0.82rem; margin-top: var(--spacing-sm); }

/* Fur swatches */
.swatches { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); }
.swatch {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 0.8rem; min-height: 44px;
    background: var(--secondary-bg); color: var(--text-secondary);
    border: 1px solid var(--border-color); border-radius: 999px;
    font-size: 0.85rem; font-weight: 500; cursor: pointer;
    transition: var(--transition-fast);
}
.swatch:hover { border-color: var(--border-hover); color: var(--text-primary); }
.swatch[aria-checked="true"] {
    border-color: var(--accent-primary); color: var(--text-primary);
    background: var(--accent-soft); box-shadow: 0 0 0 1px var(--accent-primary) inset;
}
.dot { width: 16px; height: 16px; border-radius: 50%; flex: none; box-shadow: 0 0 0 1px rgba(0,0,0,0.25) inset; }
.dot-tuxedo  { background: linear-gradient(90deg, #2c2c34 0 50%, #f6f6f8 50% 100%); }
.dot-black   { background: #33333b; }
.dot-white   { background: #f2f3f5; box-shadow: 0 0 0 1px rgba(0,0,0,0.2) inset; }
.dot-orange  { background: linear-gradient(135deg, #f5a85b, #f0913f); }
.dot-gray    { background: linear-gradient(135deg, #aab2bb, #9aa3ad); }
.dot-siamese { background: linear-gradient(135deg, #f0e7d6 0 55%, #4a3a32 55% 100%); }

/* Range */
input[type="range"] {
    -webkit-appearance: none; appearance: none; width: 100%; height: 6px;
    background: var(--secondary-bg); border: 1px solid var(--border-color);
    border-radius: 999px; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none; width: 22px; height: 22px; border-radius: 50%;
    background: var(--accent-gradient); border: 2px solid #fff3; box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}
input[type="range"]::-moz-range-thumb {
    width: 22px; height: 22px; border-radius: 50%; border: 2px solid #fff3;
    background: #fb923c; box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}
input[type="range"]:focus-visible { box-shadow: 0 0 0 3px var(--accent-soft); }

/* Segmented control */
.segmented { display: inline-flex; flex-wrap: wrap; gap: 4px; background: var(--secondary-bg); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 4px; }
.segmented button {
    flex: 1 1 auto; display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
    padding: 0.55rem 0.9rem; min-height: 44px;
    background: transparent; color: var(--text-secondary);
    border: none; border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 600;
    cursor: pointer; transition: var(--transition-fast); white-space: nowrap;
}
.segmented button:hover { color: var(--text-primary); }
.segmented button[aria-checked="true"] { background: var(--accent-gradient); color: #1a1018; }

/* Code box */
.code-box {
    background: #0c0c12; border: 1px solid var(--border-color); border-radius: var(--radius-md);
    padding: var(--spacing-md); overflow-x: auto; margin-bottom: var(--spacing-md);
}
.code-box code {
    background: none; padding: 0; color: #cbd5e1;
    white-space: pre-wrap; overflow-wrap: anywhere; /* wrap long lines on mobile, never overflow */
    font-size: 0.82rem; line-height: 1.6; display: block;
}

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.7rem 1.1rem; min-height: 44px; width: 100%;
    border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 600;
    cursor: pointer; border: none; transition: var(--transition-fast);
}
.btn-primary { background: var(--accent-gradient); color: #1a1018; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(251, 146, 60, 0.3); }
.btn.copied { background: var(--success); color: #04150f; }

/* Info section */
.info { margin-top: var(--spacing-xl); }
.section-h { font-size: 1.15rem; font-weight: 700; display: flex; align-items: center; gap: 0.55rem; margin: var(--spacing-xl) 0 var(--spacing-md); }
.section-h i { color: var(--accent-primary); }
.steps { display: grid; grid-template-columns: 1fr; gap: var(--spacing-sm); }
.step { display: flex; gap: var(--spacing-md); align-items: flex-start; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: var(--spacing-md); }
.step p { color: var(--text-secondary); }
.step-n {
    flex: none; width: 30px; height: 30px; border-radius: 50%;
    display: grid; place-items: center; font-weight: 700; font-size: 0.9rem; color: #1a1018;
    background: var(--accent-gradient);
}
.features { list-style: none; display: grid; gap: var(--spacing-sm); }
.features li { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: var(--spacing-md); color: var(--text-secondary); }
.features li i { color: var(--accent-primary); width: 1.3em; text-align: center; margin-right: 0.4rem; }
.features strong, .step strong { color: var(--text-primary); }

/* Footer */
.footer { text-align: center; padding: var(--spacing-lg); color: var(--text-muted); font-size: 0.85rem; border-top: 1px solid var(--border-color); }

/* Desktop */
@media (min-width: 760px) {
    .layout { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
    .steps { grid-template-columns: repeat(3, 1fr); }
    .features { grid-template-columns: 1fr 1fr; }
    .main { padding-bottom: 8rem; }
}

@media (prefers-reduced-motion: reduce) {
    .btn-primary:hover { transform: none; }
}