/* ══════════════════════════════════════════════════
   PrintPerfect — The Print-Ready Pixel Calculator
   Design: Clean professional dark with magenta accent
   ══════════════════════════════════════════════════ */

:root {
    --clr-bg: #0c0a10;
    --clr-surface: #14111a;
    --clr-surface-2: #1e1a26;
    --clr-border: #302a3a;
    --clr-text: #ece6f4;
    --clr-text-muted: #9088a0;
    --clr-accent: #d946ef;
    --clr-accent-glow: rgba(217, 70, 239, 0.12);
    --clr-bleed: rgba(239, 68, 68, 0.3);
    --clr-trim: rgba(255, 255, 255, 0.5);
    --clr-safe: rgba(34, 197, 94, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --font-sans: 'DM Sans', 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: var(--font-sans); background: var(--clr-bg); color: var(--clr-text);
    line-height: 1.6; min-height: 100vh; -webkit-font-smoothing: antialiased;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }

.ad-slot {
    display: flex; align-items: center; justify-content: center;
    border: 1px dashed var(--clr-border); color: var(--clr-text-muted);
    font-size: 0.75rem; text-transform: uppercase; background: var(--clr-surface);
}
.ad-slot--mobile { height: 50px; max-width: 320px; margin: 0 auto 1rem; }
.ad-slot--desktop { display: none; height: 90px; max-width: 728px; margin: 1.5rem auto; }
@media (min-width: 768px) { .ad-slot--mobile { display: none; } .ad-slot--desktop { display: flex; } }

.site-header {
    text-align: center; padding: 2.5rem 1rem 1.5rem;
    background: linear-gradient(180deg, var(--clr-surface) 0%, var(--clr-bg) 100%);
    border-bottom: 1px solid var(--clr-border);
}
.brand { display: flex; align-items: center; justify-content: center; gap: 0.6rem; }
.brand-icon { font-size: 2rem; }
.brand-name { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em; }
.brand-accent { color: var(--clr-accent); }
.brand-tagline { font-size: 0.95rem; color: var(--clr-text-muted); margin-top: 0.25rem; font-weight: 500; }
.brand-subtitle { font-size: 0.85rem; color: var(--clr-text-muted); margin-top: 0.5rem; opacity: 0.7; }

.privacy-badge {
    display: flex; align-items: center; gap: 0.5rem; justify-content: center;
    padding: 0.6rem 1rem; margin: 1.5rem auto; max-width: 380px;
    background: var(--clr-accent-glow); border: 1px solid var(--clr-accent);
    border-radius: 100px; font-size: 0.78rem; font-weight: 500; color: var(--clr-accent);
}

/* ── Tab Nav ── */
.tab-nav { display: flex; gap: 0; margin-top: 1.5rem; border-bottom: 2px solid var(--clr-border); }
.tab-btn {
    flex: 1; padding: 0.7rem 1rem; font-size: 0.88rem; font-weight: 600;
    font-family: var(--font-sans); color: var(--clr-text-muted);
    background: transparent; border: none; cursor: pointer;
    border-bottom: 2px solid transparent; margin-bottom: -2px;
    transition: all var(--transition);
}
.tab-btn:hover { color: var(--clr-text); }
.tab-btn.active { color: var(--clr-accent); border-bottom-color: var(--clr-accent); }

.tab-content { display: none; }
.tab-content.active { display: block; }

.app-grid { display: grid; gap: 1.5rem; margin-top: 1rem; }
@media (min-width: 768px) { .app-grid { grid-template-columns: 1fr 1fr; } }

.panel {
    background: var(--clr-surface); border: 1px solid var(--clr-border);
    border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow);
}
.panel-title {
    font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem;
    padding-bottom: 0.75rem; border-bottom: 1px solid var(--clr-border);
}

.input-fieldset {
    border: 1px solid var(--clr-border); border-radius: var(--radius-sm);
    padding: 1rem; margin-bottom: 1rem;
}
.input-fieldset legend {
    font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--clr-accent); padding: 0 0.4rem;
}

.input-row { display: flex; gap: 0.75rem; }
.input-row .input-group { flex: 1; }

.input-group { margin-bottom: 0.85rem; }
.input-group label {
    display: block; font-size: 0.8rem; font-weight: 600; color: var(--clr-text-muted); margin-bottom: 0.3rem;
}
.input-group input, .input-group select {
    width: 100%; padding: 0.65rem 0.85rem; font-size: 0.95rem;
    font-family: var(--font-mono); background: var(--clr-surface-2);
    border: 1px solid var(--clr-border); border-radius: var(--radius-sm);
    color: var(--clr-text); transition: border-color var(--transition);
}
.input-group input:focus, .input-group select:focus {
    outline: none; border-color: var(--clr-accent); box-shadow: 0 0 0 3px var(--clr-accent-glow);
}
.input-hint { font-size: 0.72rem; color: var(--clr-text-muted); margin-top: 0.25rem; display: block; }

.btn-calculate {
    display: block; width: 100%; padding: 0.85rem; margin-top: 0.5rem;
    font-size: 1rem; font-weight: 700; font-family: var(--font-sans);
    color: #fff; background: var(--clr-accent); border: none;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}
.btn-calculate:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(217, 70, 239, 0.35); }

.summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-bottom: 1.25rem; }
.summary-card {
    background: var(--clr-surface-2); border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm); padding: 0.9rem; text-align: center;
}
.summary-card--highlight { border-color: var(--clr-accent); background: var(--clr-accent-glow); }
.summary-label { display: block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--clr-text-muted); margin-bottom: 0.3rem; }
.summary-value { display: block; font-size: 1.15rem; font-weight: 800; font-family: var(--font-mono); }

/* ── Canvas Preview ── */
.canvas-preview { min-height: 200px; display: flex; justify-content: center; align-items: center; }
.canvas-preview svg { max-width: 100%; height: auto; }
.preview-placeholder { color: var(--clr-text-muted); text-align: center; padding: 3rem 1rem; font-size: 0.9rem; }

/* ── Legend ── */
.preview-legend { display: flex; gap: 1.25rem; justify-content: center; margin-top: 0.75rem; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 0.35rem; font-size: 0.78rem; color: var(--clr-text-muted); }
.legend-swatch { width: 14px; height: 14px; border-radius: 3px; }
.legend-swatch--bleed { background: var(--clr-bleed); border: 1px solid rgba(239, 68, 68, 0.6); }
.legend-swatch--trim { background: transparent; border: 2px dashed var(--clr-trim); }
.legend-swatch--safe { background: var(--clr-safe); border: 1px solid rgba(34, 197, 94, 0.6); }

.site-footer {
    text-align: center; padding: 2rem 1rem; margin-top: 2.5rem;
    border-top: 1px solid var(--clr-border); font-size: 0.8rem; color: var(--clr-text-muted);
}

/* ═══════════════ AFFILIATE & SEO ═══════════════ */
.seo-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 2rem 0;
}
.seo-card h2 {
    color: var(--clr-text);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}
.seo-card p {
    color: var(--clr-text-muted);
    line-height: 1.6;
}
.affiliate-gear a {
    color: var(--clr-accent);
    font-weight: 600;
    text-decoration: none;
}
.affiliate-gear a:hover {
    color: var(--clr-text);
    text-decoration: underline;
}