/* =========================================================================
   Peptide Calculator — "Spatial Glass" theme (visionOS / Apple Vision Pro vibe)
   Inspiration: LifeStats health dashboard, visionOS materials, Linear aurora.
   All styling lives here so the page ships a strict CSP (no inline styles).
   Pure CSS — no HTML/JS changes required.
   ========================================================================= */

/* ── Heebo (self-hosted, variable) ──────────────────────────────────────────
   Served from /assets/fonts so the strict CSP (font-src 'self') is preserved —
   no Google Fonts CDN. One variable woff2 per subset covers weights 100–900. */
@font-face {
    font-family: 'Heebo';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('fonts/heebo-latin.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
    font-family: 'Heebo';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('fonts/heebo-latin-ext.woff2') format('woff2');
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
    /* Backdrop */
    --bg-base: #05060e;
    --orb-1: rgba(6, 182, 212, 0.22);    /* teal   */
    --orb-2: rgba(99, 102, 241, 0.24);   /* indigo */
    --orb-3: rgba(236, 72, 153, 0.16);   /* pink   */
    --orb-4: rgba(16, 185, 129, 0.16);   /* green  */

    /* Glass material */
    --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.035));
    --glass-border: rgba(255, 255, 255, 0.16);
    --glass-highlight: rgba(255, 255, 255, 0.22);   /* inset specular top edge */
    --glass-shadow: 0 22px 60px rgba(0, 0, 0, 0.55);
    --blur: 36px;

    /* Nested translucent cards (sit on already-blurred glass) */
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-bg-hover: rgba(255, 255, 255, 0.09);
    --card-border: rgba(255, 255, 255, 0.10);

    /* Text */
    --text: #f4f7fc;
    --text-dim: rgba(231, 237, 248, 0.66);
    --text-faint: rgba(231, 237, 248, 0.5);
    --text-hint: rgba(231, 237, 248, 0.55);

    /* Accent */
    --accent: #22d3ee;
    --accent-2: #818cf8;
    --accent-grad: linear-gradient(120deg, #22d3ee 0%, #6366f1 100%);
    --accent-soft: rgba(34, 211, 238, 0.14);
    --accent-border: rgba(34, 211, 238, 0.5);

    /* Metric accent palette (activity-ring style) */
    --m1: #22d3ee; --m2: #818cf8; --m3: #34d399; --m4: #f472b6;

    --warn: #fbbf24;
    --warn-text: #fde68a;
    --danger: #fb7185;
    --danger-bg: rgba(251, 113, 133, 0.12);
    --danger-border: rgba(251, 113, 133, 0.5);

    --radius: 28px;
    --radius-sm: 18px;
    --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ── Light glass variant ── */
:root[data-theme="light"] {
    --bg-base: #e9eef8;
    --orb-1: rgba(6, 182, 212, 0.30);
    --orb-2: rgba(99, 102, 241, 0.28);
    --orb-3: rgba(236, 72, 153, 0.22);
    --orb-4: rgba(16, 185, 129, 0.22);

    --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.55));
    --glass-border: rgba(255, 255, 255, 0.85);
    --glass-highlight: rgba(255, 255, 255, 0.95);
    --glass-shadow: 0 22px 55px rgba(31, 45, 80, 0.18);

    --card-bg: rgba(255, 255, 255, 0.55);
    --card-bg-hover: rgba(255, 255, 255, 0.82);
    --card-border: rgba(255, 255, 255, 0.7);

    --text: #0d1424;
    --text-dim: rgba(18, 28, 52, 0.7);
    --text-faint: rgba(18, 28, 52, 0.55);
    --text-hint: rgba(18, 28, 52, 0.6);

    --accent: #0891b2;
    --accent-2: #6366f1;
    --accent-grad: linear-gradient(120deg, #0891b2 0%, #6366f1 100%);
    --accent-soft: rgba(8, 145, 178, 0.12);
    --accent-border: rgba(8, 145, 178, 0.45);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
/* Form controls don't inherit font-family by default — force Heebo everywhere
   (text inputs, number fields, selects + their option lists, buttons). */
input, select, option, button, textarea { font-family: inherit; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Heebo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* Dimensional drifting backdrop — a real photographic-style image (bg.svg)
   the glass refracts. Animated colour orbs drift over it for depth; the orb
   layers are transparent between stops so the image reads through. The
   high-frequency detail in bg.svg (bokeh, streaks) is what makes the
   backdrop-filter blur on the glass panels actually visible. */
body::before {
    content: "";
    position: fixed;
    inset: -25%;
    z-index: -1;
    background:
        radial-gradient(38% 42% at 18% 22%, var(--orb-2), transparent 70%),
        radial-gradient(34% 38% at 82% 18%, var(--orb-1), transparent 70%),
        radial-gradient(42% 44% at 75% 80%, var(--orb-3), transparent 72%),
        radial-gradient(40% 40% at 22% 82%, var(--orb-4), transparent 72%),
        url('bg.svg') center center / cover no-repeat;
    filter: saturate(135%);
    animation: drift 26s ease-in-out infinite alternate;
    will-change: transform;
}
/* In light mode, brighten the image so the dark aurora art doesn't dominate. */
:root[data-theme="light"] body::before { filter: saturate(120%) brightness(1.9) contrast(0.92); }
@keyframes drift {
    0%   { transform: translate3d(0, 0, 0) scale(1); }
    50%  { transform: translate3d(2%, -2%, 0) scale(1.08) rotate(2deg); }
    100% { transform: translate3d(-2%, 2%, 0) scale(1.04) rotate(-2deg); }
}

/* ── Reusable glass material ── */
.calculator-section, .info-section, .results-container,
.nasal-specs-card, .nasal-verify-card, .nasal-tips-card, .nasal-detail-card {
    position: relative;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(185%) brightness(1.07);
    backdrop-filter: blur(var(--blur)) saturate(185%) brightness(1.07);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow),
                inset 0 1px 0 var(--glass-highlight),
                inset 0 -1px 1px rgba(255, 255, 255, 0.05);
}

/* Accessibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.hidden { display: none !important; }

/* Layout utilities */
.mt-20 { margin-top: 20px; }
.mt-14 { margin-top: 14px; }
.metrics-2col { grid-template-columns: repeat(2, 1fr); }
.result-unit-line { font-size: 1rem; font-weight: 600; color: var(--accent); margin-top: 2px; }
.bottle-dose-sub { font-size: 0.88rem; font-weight: 500; color: var(--accent); margin-top: 4px; }
.yield-note { font-size: 0.74rem; color: var(--text-hint); line-height: 1.5; margin-top: 14px; padding: 12px 14px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 14px; }
.verify-icon { flex-shrink: 0; margin-top: 2px; }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--accent); color: #001018; padding: 10px 16px; border-radius: 0 0 12px 0; font-weight: 700; z-index: 100; }
.skip-link:focus { left: 0; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 36px 24px 60px;
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 32px;
    align-items: start;
}

/* ── Header ── */
.header { text-align: center; margin-bottom: 30px; grid-column: 1 / -1; position: relative; }
.brand-eyebrow { font-size: 0.95rem; font-weight: 600; color: #ff8a5c; margin-bottom: 8px; letter-spacing: 0.12em; text-transform: uppercase; }
h1 {
    font-size: 3rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 10%, #a9b4cc 90%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
:root[data-theme="light"] h1 { background: linear-gradient(135deg, #0d1424, #4b5673); -webkit-background-clip: text; background-clip: text; }
.subtitle { font-size: 1.02rem; color: var(--text-dim); }

.header-actions { position: absolute; top: 4px; right: 0; display: flex; gap: 8px; }
.icon-btn {
    background: var(--glass-bg); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border); color: var(--text);
    width: 44px; height: 44px; border-radius: 50%; cursor: pointer; font-size: 1.1rem;
    box-shadow: inset 0 1px 0 var(--glass-highlight), 0 6px 18px rgba(0,0,0,0.25);
    transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}
.icon-btn:hover { transform: translateY(-2px) scale(1.05); background: var(--card-bg-hover); }
/* Inline currency picker that sits in the price field's unit slot, replacing
   the old fixed "$". Styled to read like the static .unit-label but clickable. */
.currency-inline {
    -webkit-appearance: none; -moz-appearance: none; appearance: none;
    background: transparent; border: none; cursor: pointer;
    color: inherit; font: inherit; padding: 0 2px; text-align: center;
}
.currency-inline:hover { color: var(--accent); }
.currency-inline option { background: var(--bg-base); color: var(--text); }
@media (max-width: 700px) { .header-actions { position: static; justify-content: center; margin-top: 14px; } }

/* ── Tabs (glass segmented control) ── */
.tab-bar {
    display: flex; gap: 6px; margin-bottom: 26px; padding: 6px;
    background: var(--glass-bg); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border); border-radius: 22px;
    box-shadow: inset 0 1px 0 var(--glass-highlight);
}
.tab-btn {
    flex: 1; padding: 13px 16px; border: 1px solid transparent; border-radius: 16px;
    background: transparent; color: var(--text-faint); font-size: 0.92rem; font-weight: 600;
    cursor: pointer; transition: all 0.25s var(--ease); text-align: center; line-height: 1.3;
}
.tab-btn[aria-selected="true"] {
    color: #fff; background: var(--accent-grad);
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 24px rgba(34, 211, 238, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.tab-btn[aria-selected="false"]:hover { background: var(--card-bg-hover); color: var(--text); }
.tab-subtitle { display: block; font-size: 0.72rem; font-weight: 400; opacity: 0.8; margin-top: 3px; }

/* ── Section header ── */
.calculator-section, .info-section { padding: 30px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; gap: 12px; flex-wrap: wrap; }
.section-title { font-size: 0.9rem; font-weight: 700; color: var(--text-faint); letter-spacing: 0.18em; }
.section-tools { display: flex; gap: 8px; }

.reset-btn, .ghost-btn {
    background: var(--card-bg); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    border: 1px solid var(--card-border); color: var(--text);
    padding: 9px 16px; border-radius: 14px; cursor: pointer; font-size: 0.84rem; font-weight: 600;
    transition: all 0.2s var(--ease);
}
.reset-btn:hover, .ghost-btn:hover { background: var(--card-bg-hover); border-color: var(--accent-border); transform: translateY(-1px); }

/* ── Inputs ── */
.inputs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 22px; }
.input-card {
    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 16px 18px;
    transition: all 0.22s var(--ease);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.input-card:hover, .input-card:focus-within {
    border-color: var(--accent-border); background: var(--card-bg-hover);
    box-shadow: 0 0 0 3px var(--accent-soft), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.input-card.invalid { border-color: var(--danger); box-shadow: 0 0 0 3px var(--danger-bg); }

.input-card-label { display: block; font-size: 0.68rem; font-weight: 700; color: var(--text-faint); margin-bottom: 8px; letter-spacing: 0.1em; text-transform: uppercase; }
.input-with-unit { display: flex; align-items: baseline; gap: 6px; }
.input-card input[type="number"] {
    background: transparent; border: none; font-size: 1.7rem; font-weight: 700; color: var(--text);
    padding: 2px 0; flex: 1; outline: none; min-width: 0; width: 100%; font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}
.input-card input[type="number"]::placeholder { color: var(--text-faint); opacity: 0.5; }
.input-card input[type="number"]::-webkit-inner-spin-button,
.input-card input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.input-card input[type="number"] { -moz-appearance: textfield; }

.unit-label { font-size: 0.82rem; font-weight: 700; color: var(--text-faint); text-transform: uppercase; white-space: nowrap; }
.input-hint { font-size: 0.7rem; color: var(--text-hint); margin-top: 6px; }
.field-error { font-size: 0.72rem; color: var(--danger); margin-top: 6px; min-height: 0; font-weight: 500; }

.unit-toggle { display: flex; gap: 6px; margin-top: 12px; }
.unit-pill {
    flex: 1; padding: 8px 0; border: 1px solid var(--card-border); border-radius: 12px; background: transparent;
    color: var(--text-faint); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; cursor: pointer; transition: all 0.18s var(--ease);
}
.unit-pill[aria-pressed="true"] { background: var(--accent-grad); border-color: rgba(255, 255, 255, 0.25); color: #fff; box-shadow: 0 4px 14px rgba(34, 211, 238, 0.3); }
.unit-pill[aria-pressed="false"]:hover { border-color: var(--accent-border); color: var(--text-dim); }

/* ── Preset selector ── */
.preset-row { margin-bottom: 22px; }
.preset-label { font-size: 0.68rem; font-weight: 700; color: var(--text-faint); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px; display: block; }
.preset-select {
    width: 100%; background: var(--card-bg); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    border: 1px solid var(--card-border); color: var(--text); padding: 13px 16px; border-radius: 16px; font-size: 0.94rem; font-weight: 500; cursor: pointer;
}
.preset-select:hover { border-color: var(--accent-border); }
.preset-select option { background: #0d1426; color: var(--text); }
.preset-note { font-size: 0.72rem; color: var(--text-hint); margin-top: 10px; }

/* ── Syringe selector ── */
.syringe-selector { margin-bottom: 18px; }
.syringe-selector-label { font-size: 0.68rem; font-weight: 700; color: var(--text-faint); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 12px; }
.syringe-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.syringe-option {
    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 18px; padding: 14px 8px 12px;
    cursor: pointer; transition: all 0.22s var(--ease); display: flex; flex-direction: column; align-items: center; gap: 7px; text-align: center;
}
.syringe-option:hover { border-color: var(--accent-border); background: var(--card-bg-hover); transform: translateY(-2px); }
.syringe-option[aria-pressed="true"] { border-color: rgba(34, 211, 238, 0.55); background: var(--accent-soft); box-shadow: 0 8px 24px rgba(34, 211, 238, 0.18), inset 0 1px 0 rgba(255,255,255,0.12); }
.syringe-option-visual { width: 100%; }
.syringe-option-visual svg { width: 100%; height: auto; display: block; }
.syringe-option-label { font-size: 0.98rem; font-weight: 700; color: var(--text); }
.syringe-option[aria-pressed="true"] .syringe-option-label { color: var(--accent); }
.syringe-option-sub { font-size: 0.7rem; font-weight: 600; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }

/* ── Calculate button (primary, gradient glass) ── */
.calculate-btn {
    width: 100%; border: 1px solid rgba(255, 255, 255, 0.22); border-radius: 20px; padding: 17px;
    color: #fff; font-size: 1.02rem; font-weight: 700; cursor: pointer; letter-spacing: 0.01em;
    background: var(--accent-grad);
    box-shadow: 0 12px 34px rgba(34, 211, 238, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), filter 0.22s var(--ease);
}
.calculate-btn:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 18px 46px rgba(34, 211, 238, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.5); }
.calculate-btn:active { transform: translateY(0); }

/* ── Results ── */
.results-container { padding: 30px 26px 26px; margin-top: 24px; }

.draw-to-section {
    text-align: center; margin-bottom: 26px; border-radius: 22px; padding: 26px 20px 22px;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(99, 102, 241, 0.12));
    border: 1px solid rgba(34, 211, 238, 0.28);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 0 40px rgba(34, 211, 238, 0.12);
}
.draw-to-label { font-size: 0.7rem; font-weight: 700; color: var(--accent); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 10px; display: inline-flex; align-items: center; }
.draw-to-value { display: flex; align-items: baseline; justify-content: center; gap: 10px; }
.draw-units {
    font-size: 4.2rem; font-weight: 800; letter-spacing: -0.04em; line-height: 1; font-variant-numeric: tabular-nums;
    background: var(--accent-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    filter: drop-shadow(0 4px 24px rgba(34, 211, 238, 0.45));
}
.iu-label { font-size: 1.4rem; font-weight: 700; color: var(--accent); opacity: 0.8; }

.capacity-warning {
    display: flex; gap: 12px; align-items: flex-start; margin-bottom: 20px;
    background: var(--danger-bg); border: 1px solid var(--danger-border); border-radius: 18px; padding: 15px 17px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.capacity-warning strong { color: var(--danger); }
.capacity-warning p { font-size: 0.82rem; color: var(--text-dim); line-height: 1.45; }

.syringe-section { margin-bottom: 22px; }
.syringe-svg-wrap {
    padding: 14px; border-radius: 20px;
    background: var(--card-bg); border: 1px solid var(--card-border);
}
.syringe-svg-wrap svg { display: block; width: 100%; height: auto; }

#svgFluid, #svgFluidGloss, #svgPlungerKnob, #svgPlungerBar, #svgDropLine, #svgPointer { transition: all 320ms var(--ease); }

/* ── Metric cards (activity-ring style tinted chips) ── */
.metrics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 20px 0; }
.metric-card {
    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 18px 12px 16px;
    text-align: center; display: flex; flex-direction: column; align-items: center; gap: 6px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transition: transform 0.2s var(--ease);
}
.metric-card:hover { transform: translateY(-2px); }
.metric-icon {
    font-size: 1.25rem; width: 46px; height: 46px; display: flex; align-items: center; justify-content: center;
    border-radius: 50%; margin-bottom: 4px;
    background: radial-gradient(circle at 30% 25%, rgba(255,255,255,0.25), rgba(255,255,255,0.04));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.metrics-grid .metric-card:nth-child(1) .metric-icon { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 0 22px var(--m1); background: radial-gradient(circle at 30% 25%, var(--m1), transparent 75%); }
.metrics-grid .metric-card:nth-child(2) .metric-icon { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 0 22px var(--m2); background: radial-gradient(circle at 30% 25%, var(--m2), transparent 75%); }
.metrics-grid .metric-card:nth-child(3) .metric-icon { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 0 22px var(--m3); background: radial-gradient(circle at 30% 25%, var(--m3), transparent 75%); }
.metrics-grid .metric-card:nth-child(4) .metric-icon { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 0 22px var(--m4); background: radial-gradient(circle at 30% 25%, var(--m4), transparent 75%); }
.metric-label { font-size: 0.66rem; font-weight: 700; color: var(--text-faint); letter-spacing: 0.06em; text-transform: uppercase; }
.metric-value { font-size: 1.9rem; font-weight: 800; color: var(--text); letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.metric-unit { font-size: 0.66rem; font-weight: 600; color: var(--text-hint); }
.metric-card.nasal-metric .metric-value { color: var(--accent); }

.summary-section { text-align: center; font-size: 0.86rem; color: var(--text-dim); line-height: 1.5; margin-bottom: 14px; }
.recommendation-section { text-align: center; padding: 13px; background: var(--accent-soft); border: 1px solid var(--accent-border); border-radius: 16px; margin-bottom: 14px; box-shadow: inset 0 1px 0 rgba(255,255,255,0.12); }
.recommendation-text { font-size: 0.86rem; color: var(--accent); font-weight: 600; }
.result-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

/* ── Intranasal ── */
.nasal-specs-card { padding: 22px 24px; margin-bottom: 16px; }
.nasal-specs-title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.nasal-specs-desc { font-size: 0.82rem; color: var(--text-dim); line-height: 1.55; margin-bottom: 16px; }
.nasal-highlight { color: var(--accent); font-weight: 700; }
.nasal-specs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.nasal-spec-item { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 14px; padding: 12px 8px; text-align: center; }
.nasal-spec-label { font-size: 0.6rem; font-weight: 700; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 5px; }
.nasal-spec-value { font-size: 0.84rem; font-weight: 700; color: var(--text); }

.sub-tab-bar {
    display: flex; gap: 5px; padding: 5px; border-radius: 18px;
    background: var(--card-bg); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
}
.sub-tab-btn { flex: 1; padding: 11px 14px; border: 1px solid transparent; border-radius: 14px; background: transparent; color: var(--text-faint); font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all 0.22s var(--ease); text-align: center; line-height: 1.3; }
.sub-tab-btn[aria-selected="true"] { background: var(--accent-grad); color: #fff; border-color: rgba(255,255,255,0.22); box-shadow: 0 6px 18px rgba(34,211,238,0.28); }
.sub-tab-btn[aria-selected="false"]:hover { background: var(--card-bg-hover); color: var(--text); }

.intranasal-result-card {
    border-radius: 22px; padding: 24px; text-align: center; margin-top: 22px;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(99, 102, 241, 0.12));
    border: 1px solid rgba(34, 211, 238, 0.28);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 0 40px rgba(34, 211, 238, 0.1);
}
.intranasal-result-label { font-size: 0.68rem; font-weight: 700; color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 6px; }
.intranasal-result-value { font-size: 3.2rem; font-weight: 800; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; background: var(--accent-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; filter: drop-shadow(0 4px 20px rgba(34,211,238,0.4)); }
.intranasal-result-sub { font-size: 0.86rem; color: var(--text-faint); margin-top: 8px; }

.nasal-verify-card { background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(251, 191, 36, 0.04)) !important; border-color: rgba(251, 191, 36, 0.25) !important; padding: 20px 22px; margin-top: 18px; }
.nasal-verify-inner { display: flex; gap: 12px; align-items: flex-start; }
.nasal-verify-title { font-size: 0.92rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.nasal-verify-sub { font-size: 0.78rem; color: var(--text-dim); margin-bottom: 10px; }
.nasal-verify-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.nasal-verify-list li { display: flex; gap: 8px; font-size: 0.78rem; color: var(--text-dim); line-height: 1.4; }
.nasal-step-num { color: var(--accent); font-weight: 700; flex-shrink: 0; }
.nasal-verify-note { font-size: 0.72rem; color: var(--text-hint); font-style: italic; margin-top: 10px; line-height: 1.45; }

.nasal-tips-card { padding: 20px 22px; margin-top: 16px; }
.nasal-tips-title { font-size: 0.92rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.nasal-tips-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.nasal-tips-list li { display: flex; gap: 8px; font-size: 0.82rem; color: var(--text-dim); line-height: 1.45; }

.nasal-detail-card { padding: 22px 24px; margin-top: 16px; }
.nasal-detail-title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 14px; }
.nasal-detail-body { display: flex; flex-direction: column; gap: 10px; }
.nasal-detail-body p { font-size: 0.82rem; color: var(--text-dim); line-height: 1.65; }
.nasal-detail-body strong { color: var(--text); }
.nasal-detail-list { list-style: disc; padding-left: 18px; display: flex; flex-direction: column; gap: 5px; }
.nasal-detail-list li { font-size: 0.8rem; color: var(--text-dim); line-height: 1.5; }
.nasal-detail-list strong { color: var(--text); }

/* ── Info sidebar ── */
.info-section { position: sticky; top: 24px; }
.info-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.step { margin-bottom: 18px; }
.step h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 5px; }
.step p { color: var(--text-dim); font-size: 0.88rem; line-height: 1.5; }
.example { margin-top: 18px; }
.example h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 10px; }
.example ul { list-style: none; padding: 0; }
.example li { color: var(--text-dim); font-size: 0.86rem; margin-bottom: 5px; padding-left: 16px; position: relative; }
.example li:before { content: "•"; color: var(--accent); font-weight: bold; position: absolute; left: 0; }

.warning { background: linear-gradient(135deg, rgba(251, 191, 36, 0.12), rgba(251, 191, 36, 0.05)); border: 1px solid rgba(251, 191, 36, 0.25); border-radius: 16px; padding: 15px; margin-top: 18px; }
.warning-title { color: var(--warn); font-weight: 700; margin-bottom: 5px; font-size: 0.88rem; }
.warning p { color: var(--warn-text); font-size: 0.83rem; line-height: 1.4; }
:root[data-theme="light"] .warning p { color: #92600a; }

.reference-section { background: var(--card-bg); border-radius: 16px; padding: 15px; margin-top: 14px; border: 1px solid var(--card-border); }
.reference-title { font-size: 0.92rem; font-weight: 700; margin-bottom: 10px; }
.conversion-table, .syringe-table { display: flex; flex-direction: column; gap: 6px; }
.conversion-row, .syringe-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 8px 12px; background: var(--accent-soft); border-radius: 10px; font-size: 0.83rem; gap: 10px; }
.conversion-row span:first-child, .syringe-row span:first-child { color: var(--text); font-weight: 600; text-align: right; }
.conversion-row span:nth-child(2), .syringe-row span:nth-child(2) { color: var(--accent); font-weight: 700; text-align: center; }
.conversion-row span:last-child, .syringe-row span:last-child { color: var(--text-dim); font-weight: 600; }

/* ── Toast ── */
.toast {
    position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
    background: var(--glass-bg); -webkit-backdrop-filter: blur(24px); backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border); color: var(--text);
    padding: 13px 22px; border-radius: 16px; font-size: 0.88rem; font-weight: 600;
    box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight); opacity: 0; pointer-events: none;
    transition: all 0.3s var(--ease); z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Animations ── */
@keyframes bhg-live-dot { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.35; transform: scale(0.85); } }
.bhg-live-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-right: 8px; vertical-align: middle; animation: bhg-live-dot 1.6s ease-in-out infinite; box-shadow: 0 0 10px var(--accent); }

@keyframes fade-up { from { opacity: 0; transform: translateY(12px) scale(0.99); } to { opacity: 1; transform: translateY(0) scale(1); } }
.fade-up { animation: fade-up 420ms var(--ease); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
    body::before { animation: none; }
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .container { grid-template-columns: 1fr; gap: 22px; padding: 24px 16px 48px; }
    h1 { font-size: 2.3rem; }
    .info-section { position: static; }
}
@media (max-width: 500px) {
    .metrics-grid { grid-template-columns: 1fr 1fr; }
    .nasal-specs-grid { grid-template-columns: repeat(2, 1fr); }
    .metric-value { font-size: 1.6rem; }
    .draw-units { font-size: 3.2rem; }
    .input-with-unit { align-items: center; }
    .unit-label { font-size: 0.9rem; align-self: center; }
    .input-card input[type="number"] { font-size: 1.9rem; padding: 4px 0; }
}

/* ── Half-unit toggle + nearest-mark hint ── */
.half-unit-row { display: flex; justify-content: flex-end; margin: 2px 0 16px; }
.half-unit-pill { flex: 0 0 auto; padding: 8px 16px; }
.draw-mark-hint { font-size: 0.75rem; color: var(--text-hint); margin-top: 8px; min-height: 0; }

/* ── Data tables (titration + log) ── */
.data-table-wrap { overflow-x: auto; border-radius: 16px; border: 1px solid var(--card-border); background: var(--card-bg); }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; font-variant-numeric: tabular-nums; }
.data-table th, .data-table td { padding: 11px 14px; text-align: left; white-space: nowrap; }
.data-table thead th { font-size: 0.66rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); border-bottom: 1px solid var(--card-border); }
.data-table tbody tr + tr td { border-top: 1px solid var(--card-border); }
.data-table tbody td:first-child { color: var(--accent); font-weight: 700; }
.data-table .row-del {
    background: transparent; border: none; color: var(--text-faint); cursor: pointer; font-size: 1rem;
    padding: 2px 6px; border-radius: 8px; line-height: 1;
}
.data-table .row-del:hover { color: var(--danger); background: var(--danger-bg); }
.log-empty { font-size: 0.86rem; color: var(--text-dim); line-height: 1.6; padding: 8px 2px; }

/* ── Tracker ── */
.text-input {
    background: transparent; border: none; font-size: 1.25rem; font-weight: 700; color: var(--text);
    padding: 2px 0; width: 100%; outline: none; min-width: 0; letter-spacing: -0.01em;
}
.text-input::placeholder { color: var(--text-faint); opacity: 0.5; }
.stock-list { display: flex; flex-direction: column; gap: 12px; }
.stock-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 18px; padding: 16px 18px; box-shadow: inset 0 1px 0 rgba(255,255,255,0.08); }
.stock-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.stock-name { font-size: 1.05rem; font-weight: 700; color: var(--text); }
.stock-sub { font-size: 0.72rem; color: var(--text-faint); margin-top: 2px; }
.stock-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.stock-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.stock-stat { text-align: center; background: var(--accent-soft); border: 1px solid var(--card-border); border-radius: 12px; padding: 10px 6px; }
.stock-stat-value { font-size: 1.25rem; font-weight: 800; color: var(--accent); line-height: 1; font-variant-numeric: tabular-nums; }
.stock-stat-label { font-size: 0.6rem; font-weight: 700; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 5px; }
.stock-bar { height: 7px; border-radius: 4px; background: var(--card-border); margin-top: 12px; overflow: hidden; }
.stock-bar-fill { height: 100%; border-radius: 4px; background: var(--accent-grad); transition: width 0.3s var(--ease); }
.stock-bar-fill.low { background: linear-gradient(120deg, #fb7185, #f59e0b); }
.use-dose-btn { padding: 8px 14px; font-size: 0.8rem; }
@media (max-width: 560px) { .stock-stats { grid-template-columns: repeat(2, 1fr); } }

/* ── Tracker auth ── */
.signin-card { padding: 40px 28px; }
.signin-inner { max-width: 460px; margin: 0 auto; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.signin-icon { font-size: 2rem; }
.signin-title { font-size: 1.35rem; font-weight: 700; }
.signin-sub { font-size: 0.9rem; color: var(--text-dim); line-height: 1.55; }
.signin-btn { display: inline-flex; align-items: center; justify-content: center; width: auto; padding: 14px 26px; margin-top: 8px; text-decoration: none; }
.signin-note { font-size: 0.78rem; min-height: 0; }
.signin-note.err { color: var(--danger); }
.account-bar {
    display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
    padding: 12px 16px; margin-bottom: 4px; border-radius: 16px;
    background: var(--card-bg); border: 1px solid var(--card-border);
}
.account-who { font-size: 0.84rem; color: var(--text-dim); }
.account-who strong { color: var(--text); }

/* ── Sub-tab subtitles (recon Standard/Reverse/Blend) ── */
.sub-tab-btn .tab-subtitle { display: block; font-size: 0.68rem; font-weight: 400; opacity: 0.8; margin-top: 2px; }

/* ── Mobile: let the 4-tab bar wrap 2×2 instead of squashing ── */
@media (max-width: 620px) {
    .tab-bar { flex-wrap: wrap; }
    .tab-btn { flex: 1 1 calc(50% - 6px); }
}

/* ── Print ── */
@media print {
    body { background: #fff; color: #000; }
    body::before { display: none; }
    .header-actions, .tab-bar, .sub-tab-bar, .calculate-btn, .reset-btn, .ghost-btn,
    .result-actions, .info-section, .syringe-selector, .preset-row, .skip-link,
    .half-unit-row, .stock-actions, .row-del { display: none !important; }
    .calculator-section, .results-container { border: 1px solid #ccc; box-shadow: none; background: #fff; -webkit-backdrop-filter: none; backdrop-filter: none; }
    .draw-units, .iu-label, .metric-value, .intranasal-result-value { -webkit-text-fill-color: #000 !important; color: #000 !important; filter: none !important; }
    .data-table th, .data-table td { color: #000 !important; }
    .stock-stat-value { color: #000 !important; }
}