/* ═══════════════════════════════════════════════════════
   MOBILE  — bottom nav bar + responsive layout polish
   ═══════════════════════════════════════════════════════ */

/* ── Bottom Navigation Bar ──────────────────────────────
   Hidden on desktop; revealed at ≤ 768 px via the
   @media block below.
   ─────────────────────────────────────────────────────── */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 490;
    align-items: stretch;
    justify-content: space-around;

    background: rgba(13, 11, 26, 0.82);
    backdrop-filter: blur(28px) saturate(1.5);
    -webkit-backdrop-filter: blur(28px) saturate(1.5);
    border-top: 1px solid rgba(167, 139, 250, 0.14);
    box-shadow:
        0 -2px 24px rgba(0, 0, 0, 0.55),
        inset 0 1px 0 rgba(167, 139, 250, 0.07);

    /* top padding + safe-area for phones with home indicator */
    padding: 0.28rem 0.15rem;
    padding-bottom: calc(0.28rem + env(safe-area-inset-bottom));
}

/* Subtle gradient line at the very top of the bar */
.bottom-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 6%;
    right: 6%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(167, 139, 250, 0.38) 30%,
        rgba(255, 107, 157, 0.22) 60%,
        transparent
    );
    pointer-events: none;
}

/* ── Nav Button ─────────────────────────────────────────── */
.bnav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 0.22rem;
    padding: 0.45rem 0.1rem 0.32rem;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    border-radius: 12px;
    min-height: 56px;
    transition: all 0.2s var(--ease);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
}

/* Press ripple */
.bnav-btn::after {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 10px;
    background: transparent;
    transition: background 0.14s;
}
.bnav-btn:active::after {
    background: rgba(167, 139, 250, 0.1);
}

/* ── Active indicator pill (top edge) ──────────────────── */
.bnav-indicator {
    position: absolute;
    top: 5px;
    left: 50%;
    width: 22px;
    height: 3px;
    border-radius: 99px;
    background: var(--violet);
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 0.28s var(--spring), background 0.2s;
    pointer-events: none;
}

.bnav-btn.active .bnav-indicator {
    transform: translateX(-50%) scaleX(1);
}

/* ── Icon ───────────────────────────────────────────────── */
.bnav-icon {
    width: 23px;
    height: 23px;
    stroke: var(--muted);
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
    transition: stroke 0.2s, transform 0.26s var(--spring);
}

.bnav-btn.active .bnav-icon {
    stroke: var(--violet);
    transform: translateY(-2px) scale(1.1);
}

/* ── Label ──────────────────────────────────────────────── */
.bnav-label {
    font-family: var(--ff-h);
    font-size: 0.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    transition: color 0.2s;
    line-height: 1;
    white-space: nowrap;
}

.bnav-btn.active .bnav-label {
    color: var(--violet);
}

/* ── Per-tab accent colours ─────────────────────────────── */
/* strength — violet (default, already set above) */

/* cardio — sky */
.bnav-btn[data-tab="cardio"].active .bnav-indicator { background: var(--sky); }
.bnav-btn[data-tab="cardio"].active .bnav-icon      { stroke: var(--sky); }
.bnav-btn[data-tab="cardio"].active .bnav-label     { color: var(--sky); }

/* body — amber */
.bnav-btn[data-tab="body"].active .bnav-indicator   { background: var(--amber); }
.bnav-btn[data-tab="body"].active .bnav-icon        { stroke: var(--amber); }
.bnav-btn[data-tab="body"].active .bnav-label       { color: var(--amber); }

/* metrics — violet/sky */
.bnav-btn[data-tab="metrics"].active .bnav-indicator { background: #38bdf8; }
.bnav-btn[data-tab="metrics"].active .bnav-icon      { stroke: #38bdf8; }
.bnav-btn[data-tab="metrics"].active .bnav-label     { color: #38bdf8; }

/* vault — violet (same as strength but listed for clarity) */
.bnav-btn[data-tab="vault"].active .bnav-indicator  { background: #a78bfa; }
.bnav-btn[data-tab="vault"].active .bnav-icon       { stroke: #a78bfa; }
.bnav-btn[data-tab="vault"].active .bnav-label      { color: #a78bfa; }

/* workout — amber/orange */
.bnav-btn[data-tab="workout"].active .bnav-indicator { background: #f59e0b; }
.bnav-btn[data-tab="workout"].active .bnav-icon      { stroke: #f59e0b; }
.bnav-btn[data-tab="workout"].active .bnav-label     { color: #f59e0b; }

/* system — indigo */
.bnav-btn[data-tab="system"].active .bnav-indicator { background: #6366f1; }
.bnav-btn[data-tab="system"].active .bnav-icon      { stroke: #6366f1; }
.bnav-btn[data-tab="system"].active .bnav-label     { color: #6366f1; }


/* ════════════════════════════════════════════════════════
   RESPONSIVE OVERRIDES  ≤ 768 px
   ════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* ── Activate bottom nav, kill top nav ─────────────── */
    .bottom-nav { display: flex; }
    .tab-nav    { display: none !important; }

    /* ── Body / Page wrapper ────────────────────────────── */
    /* overflow-x on html (not body) prevents mobile browsers from
       treating body as a scroll container, which can clip position:fixed
       elements like the session bar */
    html { overflow-x: hidden; }
    body {
        padding: 0.75rem;
        padding-bottom: 0;
    }

    /* Clear the bottom nav + safe area at the bottom of scroll */
    .page-wrap {
        padding-bottom: calc(5rem + env(safe-area-inset-bottom));
    }

    /* ── Tab-section entrance animation on mobile ──────── */
    .tab-section.active {
        animation: mobileTabIn 0.22s var(--ease) both;
    }

    @keyframes mobileTabIn {
        from { opacity: 0; transform: translateY(8px); }
        to   { opacity: 1; transform: translateY(0);   }
    }

    /* ── Hero ───────────────────────────────────────────── */
    .hero {
        padding: 1rem 0.25rem 0.6rem;
    }
    .hero-icon-wrap {
        display: none;
    }
    .hero h1 {
        font-size: clamp(1.75rem, 7.5vw, 2.8rem);
        letter-spacing: 0.15em;
    }
    .hero .tagline {
        font-size: 0.7rem;
        line-height: 1.5;
        letter-spacing: 0.04em;
        padding: 0 0.5rem;
    }
    /* trim heavy animated elements to keep mobile smooth */
    .hg-rays   { display: none; }
    .hg-ring--3 { display: none; }
    .geo-shape { display: none; }

    /* ── Time Strip ─────────────────────────────────────── */
    .time-strip {
        gap: 0.38rem;
        margin-bottom: 0.9rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    .time-pill {
        padding: 0.42rem 0.65rem;
        flex: 1 1 auto;
        min-width: 0;
    }
    .time-pill-label { font-size: 0.48rem; }
    .time-pill-value { font-size: 0.75rem; }

    /* ── Fixed UI widgets ───────────────────────────────── */
    /* Date chip is redundant on mobile (phones show date natively) */
    .date-chip-wrap { display: none; }

    /* PST clock: hidden on mobile */
    .pst-clock { display: none; }

    /* Session bar: hidden on mobile */
    .session-bar { display: none; }

    /* ── Toast: above bottom nav ────────────────────────── */
    .toast {
        bottom: calc(4.5rem + env(safe-area-inset-bottom));
        right: 0.75rem;
        left: 0.75rem;
        max-width: none;
        text-align: center;
    }

    /* ── FAB (Body): above bottom nav ───────────────────── */
    .body-fab {
        bottom: calc(4.5rem + env(safe-area-inset-bottom) + 0.75rem);
        right: 0.75rem;
        width: 52px;
        height: 52px;
        font-size: 1.3rem;
    }

    /* ── Bento grid: single column ─────────────────────── */
    .bento {
        grid-template-columns: 1fr;
        gap: 0.7rem;
    }

    /* ── Metric cards ───────────────────────────────────── */
    .metric-card {
        padding: 1rem 1.1rem;
    }
    .metric-value { font-size: 2rem; }

    /* ── Section headers / filter bars ─────────────────── */
    .section-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .section-title { font-size: 0.9rem; }
    .filter-bar    { flex-wrap: wrap; gap: 0.45rem; }

    /* ── Tables: allow horizontal scroll on narrow screens  */
    .log-table-wrap,
    .body-history-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* ── Cardio & Body grids ────────────────────────────── */
    .cardio-stats          { grid-template-columns: repeat(2, 1fr); }
    .cardio-visual-row     { grid-template-columns: 1fr; }
    .body-top-row          { grid-template-columns: 1fr; }
    .body-vitals-grid      { grid-template-columns: 1fr 1fr; }

    /* ══ VAULT — full mobile overhaul ════════════════════
       Using #tab-vault prefix to beat the inline <style>
       declarations in index.html (specificity: 0,1,1,0
       wins over 0,0,1,0 on equal cascade position).
       ═════════════════════════════════════════════════ */

    /* ── Vault hero: strip down to a compact title bar ─ */
    #tab-vault .vault-hero {
        padding: 0.5rem 0 0.75rem;
    }
    #tab-vault .vault-hero-eyebrow {
        font-size: 0.46rem;
        letter-spacing: 0.28em;
        margin-bottom: 0.3rem;
    }
    #tab-vault .vault-hero-title {
        font-size: 2rem;
        letter-spacing: 0.18em;
    }
    #tab-vault .vault-hero-sub {
        font-size: 0.52rem;
        letter-spacing: 0.14em;
        margin-top: 0.3rem;
    }

    /* ── Module card ────────────────────────────────── */
    #tab-vault .vault-module {
        border-radius: 14px;
        margin-bottom: 0.85rem;
    }
    /* Disable hover lift — touch devices don't hover */
    #tab-vault .vault-module:hover {
        transform: none;
    }

    /* ── Module header ──────────────────────────────── */
    #tab-vault .vault-module-header {
        padding: 0.85rem 0.95rem 0.75rem;
        gap: 0.65rem;
    }
    #tab-vault .vault-mod-icon-wrap {
        width: 40px;
        height: 40px;
        border-radius: 11px;
        flex-shrink: 0;
    }
    #tab-vault .vault-mod-icon-wrap svg {
        width: 18px;
        height: 18px;
    }
    #tab-vault .vault-mod-label {
        font-size: 0.95rem;
        letter-spacing: 0.08em;
    }
    #tab-vault .vault-mod-count {
        font-size: 0.51rem;
        letter-spacing: 0.08em;
        /* clip long description text on narrow screens */
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 52vw;
    }
    #tab-vault .vault-toggle-btn {
        width: 28px;
        height: 28px;
        flex-shrink: 0;
    }

    /* ── Sub-tabs: horizontally scrollable strip ─────
       Long labels ("Session History", "Personal Records",
       "Storage Access") would wrap or overflow at narrow
       widths — make the strip scroll instead.           */
    #tab-vault .vault-subtabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 0 0.8rem;
        flex-wrap: nowrap;
    }
    #tab-vault .vault-subtabs::-webkit-scrollbar {
        display: none;
    }
    #tab-vault .vault-subtab {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 0.6rem 0.85rem;
        font-size: 0.64rem;
        letter-spacing: 0.1em;
    }

    /* ── Pane content: tighter padding ─────────────── */
    #tab-vault .vault-pane {
        padding: 0.85rem 0.9rem 1rem;
    }

    /* ── Strength history: stack filters, scroll table  */
    #vs-history .filter-bar {
        flex-direction: column;
        gap: 0.45rem;
    }
    #vs-history .filter-bar select {
        width: 100%;
    }
    /* Make the table element itself scroll as a block,
       preserving the thead/tbody semantic structure.   */
    #vs-history table,
    #vc-history table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    #vs-history thead, #vs-history tbody,
    #vc-history thead, #vc-history tbody {
        display: table;
        min-width: 480px;
        width: 100%;
    }

    /* "Add Cardio Session" button: full-width tap target */
    #vc-history > div:first-child {
        width: 100%;
    }
    #c-open-panel {
        width: 100%;
        border-radius: 12px;
    }

    /* ── PR cards: 2-column grid ────────────────────── */
    #tab-vault .vault-pr-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.55rem;
    }
    #tab-vault .vault-pr-card {
        padding: 0.7rem 0.85rem;
        border-radius: 11px;
    }
    #tab-vault .vault-pr-card-val {
        font-size: 1.25rem;
    }
    #tab-vault .vault-pr-card-label {
        font-size: 0.53rem;
    }
    #tab-vault .vault-pr-card:hover {
        transform: none;
    }

    /* ── Storage buttons: full-width horizontal rows ──
       Switching from a 3-column icon-only grid to a
       stacked list with icon + label side by side —
       much easier to read and tap on mobile.          */
    #tab-vault .vault-storage-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    #tab-vault .vault-storage-btn {
        flex-direction: row;
        justify-content: flex-start;
        align-items: center;
        gap: 0.9rem;
        padding: 0.9rem 1.1rem;
        border-radius: 12px;
        text-align: left;
        min-height: 52px;
    }
    #tab-vault .vault-storage-btn-icon {
        font-size: 1.25rem;
        flex-shrink: 0;
    }
    #tab-vault .vault-storage-btn:hover {
        transform: none;
    }

    /* Settings cards */
    .settings-grid         { grid-template-columns: 1fr; }
    .settings-hero         { padding: 1.2rem 0; }
    .settings-hero-title   { font-size: 1.4rem; }

    /* Auth overlay inputs – 16 px prevents iOS zoom on focus */
    .auth-input { font-size: 1rem; }
}

/* ════════════════════════════════════════════════════════
   EXTRA-SMALL  ≤ 400 px  (SE, older Android)
   ════════════════════════════════════════════════════════ */
@media (max-width: 400px) {
    .bnav-label  { font-size: 0.44rem; letter-spacing: 0.07em; }
    .bnav-icon   { width: 20px; height: 20px; }
    .bnav-btn    { min-height: 52px; }

    body  { padding: 0.5rem; padding-bottom: 0; }
    .hero h1 { font-size: 1.6rem; letter-spacing: 0.1em; }
    .hero .tagline { font-size: 0.65rem; }

    .cardio-stats { grid-template-columns: 1fr 1fr; }
}