/* =========================================================
   Quantum Step — Shared Tool Design System
   Applied across all 4 tool pages for consistent look/feel
   ========================================================= */

/* ── Design Tokens ─────────────────────────────────────── */
:root {
    --tool-bg: #020617;
    --tool-surface: rgba(15, 23, 42, 0.7);
    --tool-surface-hover: rgba(15, 23, 42, 0.9);
    --tool-border: rgba(255, 255, 255, 0.08);
    --tool-border-accent: rgba(99, 102, 241, 0.3);
    --tool-radius: 1.5rem;
    --tool-radius-sm: 0.875rem;
    --tool-radius-xs: 0.5rem;
    --tool-blur: blur(24px);
    --tool-transition: 0.25s ease;
    --tool-indigo: #818cf8;
    --tool-emerald: #34d399;
    --tool-rose: #fb7185;
    --tool-amber: #fbbf24;
    --tool-text: #f1f5f9;
    --tool-text-muted: #94a3b8;
    --tool-text-dim: #64748b;
}

/* ── Page Base ─────────────────────────────────────────── */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--tool-bg);
    color: var(--tool-text);
    margin: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ── Glass Panel — unified across all tools ────────────── */
.glass-panel {
    background: var(--tool-surface) !important;
    backdrop-filter: var(--tool-blur) !important;
    -webkit-backdrop-filter: var(--tool-blur) !important;
    border: 1px solid var(--tool-border) !important;
    border-radius: var(--tool-radius) !important;
    transition: box-shadow var(--tool-transition), border-color var(--tool-transition);
}

.glass-panel:hover {
    border-color: rgba(99, 102, 241, 0.15) !important;
}

/* Glass card variant (inner panels) */
.glass-card {
    background: rgba(255, 255, 255, 0.03) !important;
    border: 1px solid rgba(255, 255, 255, 0.06) !important;
    border-radius: var(--tool-radius-sm) !important;
    padding: 1.25rem !important;
    transition: all var(--tool-transition);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

/* ── Rounded overrides (Tailwind round fixes) ──────────── */
.rounded-xl {
    border-radius: var(--tool-radius-sm) !important;
}

.rounded-2xl {
    border-radius: var(--tool-radius) !important;
}

.rounded-3xl {
    border-radius: 2rem !important;
}

.rounded-full {
    border-radius: 999px !important;
}

.rounded-lg {
    border-radius: var(--tool-radius-xs) !important;
}

/* ── Input / Select / Textarea ─────────────────────────── */
input[type="text"],
input[type="number"],
input[type="email"],
input[type="tel"],
input[type="range"],
select,
textarea {
    background: rgba(15, 23, 42, 0.6) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: var(--tool-radius-sm) !important;
    color: var(--tool-text) !important;
    font-family: 'Inter', sans-serif !important;
    font-size: 0.9rem !important;
    transition: border-color var(--tool-transition), box-shadow var(--tool-transition) !important;
    outline: none !important;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    border-color: rgba(99, 102, 241, 0.5) !important;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12) !important;
}

input[type="range"] {
    -webkit-appearance: none;
    height: 6px;
    border-radius: 999px !important;
    background: rgba(99, 102, 241, 0.2) !important;
    border: none !important;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #6366f1;
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
    cursor: pointer;
    border: 2px solid #818cf8;
}

select option {
    background: #1e293b;
    color: var(--tool-text);
}

/* ── Result / Stat Cards ───────────────────────────────── */
.result-card,
.stat-card,
.metric-card,
[class*="result-"] {
    background: rgba(255, 255, 255, 0.03) !important;
    border: 1px solid rgba(255, 255, 255, 0.07) !important;
    border-radius: var(--tool-radius-sm) !important;
    padding: 1.25rem 1.5rem !important;
    transition: all var(--tool-transition) !important;
}

/* ── Buttons ───────────────────────────────────────────── */
button[type="submit"],
button[type="button"].primary-btn,
.calculate-btn,
button.calculate,
button.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    color: #fff;
    border: none;
    border-radius: var(--tool-radius-sm);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: all var(--tool-transition);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
    font-family: 'Inter', sans-serif;
}

button[type="submit"]:hover,
button.calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
}

/* ── Tables ────────────────────────────────────────────── */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

thead th {
    background: rgba(99, 102, 241, 0.08) !important;
    color: #94a3b8 !important;
    font-size: 0.72rem !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.08em !important;
    padding: 0.85rem 1.25rem !important;
}

thead th:first-child {
    border-radius: var(--tool-radius-xs) 0 0 0 !important;
}

thead th:last-child {
    border-radius: 0 var(--tool-radius-xs) 0 0 !important;
}

tbody tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04) !important;
    transition: background var(--tool-transition);
}

tbody tr:hover {
    background: rgba(99, 102, 241, 0.05) !important;
}

tbody td {
    padding: 0.75rem 1.25rem !important;
    color: #cbd5e1 !important;
    font-size: 0.85rem !important;
}

/* ── Section Headers ───────────────────────────────────── */
.tool-section-title,
h1.tool-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.tool-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.9rem;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 999px;
    color: #818cf8;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

/* ── Labels ────────────────────────────────────────────── */
label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--tool-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.4rem;
}

/* ── Tooltips / Value Display ──────────────────────────── */
.value-display {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
}

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.3);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.5);
}

/* ── Gradient Accent Helpers ───────────────────────────── */
.text-gradient {
    background: linear-gradient(135deg, #818cf8, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent-indigo {
    color: var(--tool-indigo);
}

.accent-emerald {
    color: var(--tool-emerald);
}

.accent-rose {
    color: var(--tool-rose);
}

.accent-amber {
    color: var(--tool-amber);
}

/* ── Utility overrides ─────────────────────────────────── */
.p-6 {
    padding: 1.5rem !important;
}

.p-8 {
    padding: 2rem !important;
}

.mt-6 {
    margin-top: 1.5rem !important;
}

.mb-4 {
    margin-bottom: 1rem !important;
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
    .glass-panel {
        border-radius: 1rem !important;
    }

    .glass-card {
        border-radius: 0.75rem !important;
    }
}