/* ── Tokens ──────────────────────────────────── */

:root {
    --bg: #f7f8fb;
    --surface: #ffffff;
    --surface-soft: #f9fafc;
    --text: #1f2430;
    --muted: #687084;
    --border: #d8dce6;
    --border-subtle: #e2e6ef;
    --indicator-inactive: #c8cedd;
    --primary: #3b57e8;
    --success: #198754;
    --warning: #f59f00;
    --danger: #d63384;
    --danger-border: #efb8d2;
    --tint-warmup-bg: #fff8ed;
    --tint-feedback-bg: #fff3cc;
    --tint-feedback-border: #e8d48a;
    --toast-success-bg: #e8f5ec;
    --toast-success-border: #b8dfc4;
    --toast-success-text: #0d4a22;
    --toast-warning-bg: #fff8e6;
    --toast-warning-border: #f5d88a;
    --toast-warning-text: #6b4e00;
    --toast-danger-bg: #fdeef3;
    --toast-danger-border: #f0b8cc;
    --toast-danger-text: #7a1035;
    --radius: 12px;
    --radius-md: 8px;
    --shadow: 0 6px 18px rgba(20, 25, 40, 0.08);
    --shadow-sm: 0 4px 12px rgba(20, 25, 40, 0.12);
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
}

/* ── Reset ───────────────────────────────────── */

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ── Layout ──────────────────────────────────── */

.page {
    padding: var(--space-4);
}

.page-narrow {
    max-width: 520px;
    margin: 0 auto;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: var(--space-4);
}

.surface-soft {
    background: var(--surface-soft);
}

.row-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.row-center {
    display: flex;
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.stack-xs > * + * {
    margin-top: var(--space-1);
}

.stack-sm > * + * {
    margin-top: var(--space-2);
}

.stack-md > * + * {
    margin-top: var(--space-3);
}

.stack-lg > * + * {
    margin-top: var(--space-4);
}

.gap-sm {
    gap: var(--space-2);
}

.gap-md {
    gap: var(--space-3);
}

/* ── Typography ──────────────────────────────── */

.text-muted {
    color: var(--muted);
}

.title-lg {
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.2;
}

.title-md {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.25;
}

.title-sm {
    margin: 0;
    font-size: 1rem;
}

.text-sm {
    font-size: 0.9rem;
}

.text-xs {
    font-size: 0.82rem;
}

.text-center {
    text-align: center;
}

.fs-xl {
    font-size: 1.9rem;
}

.fw-700 {
    font-weight: 700;
}

.font-italic {
    font-style: italic;
}

/* ── Spacing utilities ───────────────────────── */

.m-0 {
    margin: 0;
}

.m-1 {
    margin: var(--space-1);
}

.m-auto {
    margin: auto;
}

.mt-1 {
    margin-top: var(--space-1);
}

.mt-2 {
    margin-top: var(--space-2);
}

.mt-3 {
    margin-top: var(--space-3);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-5 {
    margin-top: var(--space-5);
}

.mb-1 {
    margin-bottom: var(--space-1);
}

.mb-2 {
    margin-bottom: var(--space-2);
}

.mb-3 {
    margin-bottom: var(--space-3);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.p-2 {
    padding: var(--space-2);
}

.p-3 {
    padding: var(--space-3);
}

.p-4 {
    padding: var(--space-4);
}

.pt-3 {
    padding-top: var(--space-3);
}

.pb-3 {
    padding-bottom: var(--space-3);
}

/* ── Misc utilities ──────────────────────────── */

.relative {
    position: relative;
}

.opacity-50 {
    opacity: 0.5;
}

.w-100 {
    width: 100%;
}

/* ── Buttons ─────────────────────────────────── */

.btn {
    border: 1px solid var(--border);
    border-radius: 10px;
    min-height: 42px;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.btn-outline {
    background: var(--surface);
    border-color: var(--border);
}

.btn-danger-outline {
    background: var(--surface);
    color: var(--danger);
    border-color: var(--danger-border);
}

.btn-success {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
}

.btn-warning {
    background: var(--warning);
    border-color: var(--warning);
    color: var(--text);
}

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}

.icon-btn {
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--surface);
    border-radius: 8px;
    min-width: 36px;
    min-height: 36px;
    cursor: pointer;
}

.icon-btn-danger {
    border-color: var(--danger-border);
    color: var(--danger);
}

.link-btn {
    border: 0;
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    padding: 0;
}

/* ── Grid ────────────────────────────────────── */

.grid-3 {
    display: grid;
    gap: var(--space-2);
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ── Table ───────────────────────────────────── */

.table-shell {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--surface);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table-compact {
    font-size: 0.86rem;
}

.table th,
.table td {
    padding: 0.55rem 0.4rem;
    border-bottom: 1px solid #eceff5;
    text-align: left;
}

.table th {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.78rem;
}

.clickable-row,
.clickable {
    cursor: pointer;
}

/* ── Forms ───────────────────────────────────── */

.form-stack {
    display: grid;
    gap: var(--space-2);
}

.form-stack label {
    font-size: 0.88rem;
    color: var(--muted);
}

.form-control {
    border: 1px solid var(--border);
    border-radius: 10px;
    min-height: 42px;
    padding: 0 0.75rem;
    background: var(--surface);
}

textarea.form-control {
    padding-block: 0.65rem;
}

.gainz-toggle-switch {
    position: relative;
    display: inline-block;
    width: 2.75rem;
    height: 1.5rem;
    flex-shrink: 0;
    cursor: pointer;
}

.gainz-toggle-input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.gainz-toggle-slider {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background-color: var(--border);
    transition: background-color 0.15s ease;
}

.gainz-toggle-slider::before {
    content: "";
    position: absolute;
    width: 1.15rem;
    height: 1.15rem;
    left: 0.175rem;
    bottom: 0.175rem;
    border-radius: 50%;
    background-color: var(--surface);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: transform 0.15s ease;
}

.gainz-toggle-input:checked + .gainz-toggle-slider {
    background-color: var(--primary);
}

.gainz-toggle-input:checked + .gainz-toggle-slider::before {
    transform: translateX(1.25rem);
}

.gainz-toggle-input:focus-visible + .gainz-toggle-slider {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ── Exercise type badge ─────────────────────── */

.exercise-type-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.exercise-type-badge--primary   { background: #c9a227; }
.exercise-type-badge--secondary { background: #9e9e9e; }
.exercise-type-badge--accessory { background: var(--muted); }

/* ── Dropdown ────────────────────────────────── */

.gainz-dropdown {
    position: relative;
    display: inline-block;
}

.gainz-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.25rem);
    left: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 200;
    min-width: 180px;
    padding: 0.25rem 0;
}

.gainz-dropdown-item {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text);
}

.gainz-dropdown-item:hover {
    background: var(--bg);
}

.gainz-dropdown-divider {
    border-top: 1px solid var(--border);
    margin: 0.25rem 0;
}

.gainz-dropdown-empty {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    color: var(--muted);
    margin: 0;
}

.gainz-dropdown-full {
    display: block;
    width: 100%;
}

.gainz-dropdown-full .gainz-dropdown-menu {
    min-width: 100%;
}

/* ── Modal ───────────────────────────────────── */

.gainz-modal {
    display: none;
    position: fixed;
    z-index: 1050;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    align-items: center;
    justify-content: center;
    background-color: rgba(31, 36, 48, 0.45);
}

.gainz-modal-content {
    background-color: var(--surface);
    margin: auto;
    padding: var(--space-4);
    border: 1px solid var(--border);
    width: min(100%, 520px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    position: relative;
}

.gainz-modal-close {
    color: var(--muted);
    float: right;
    font-size: 1.75rem;
    font-weight: 700;
    cursor: pointer;
    line-height: 1;
    padding: 0 var(--space-2);
}

.gainz-modal-close:hover,
.gainz-modal-close:focus {
    color: var(--text);
    text-decoration: none;
}

.gainz-modal-content::after {
    content: "";
    clear: both;
    display: table;
}

/* ── Set modal fields + value picker ─────────── */

.set-modal-fields-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.set-modal-fields-row .form-control {
    flex: 1;
    min-width: 0;
}

.set-modal-times {
    flex-shrink: 0;
    font-weight: 600;
    line-height: 1;
    color: var(--muted);
}

.set-modal-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.value-picker {
    flex: 1;
    min-width: 0;
    position: relative;
}

.value-picker-window {
    height: 132px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        #000 18%,
        #000 82%,
        transparent 100%
    );
}

.value-picker-list {
    list-style: none;
    margin: 0;
    padding: 44px 0;
    scroll-snap-type: y mandatory;
}

.value-picker-item {
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    scroll-snap-align: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
}

.value-picker-item.is-near {
    opacity: 0.45;
}

.value-picker-item.is-center {
    opacity: 1;
    font-weight: 700;
}

/* ── Toast ───────────────────────────────────── */

.toast-container {
    position: fixed;
    bottom: var(--space-4);
    right: var(--space-4);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    max-width: min(100vw - 2 * var(--space-4), 360px);
    pointer-events: none;
}

.gainz-toast {
    position: relative;
    padding: var(--space-3) var(--space-5) var(--space-3) var(--space-3);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    background: var(--surface);
    pointer-events: auto;
}

.gainz-toast-success {
    background: var(--toast-success-bg);
    border-color: var(--toast-success-border);
    color: var(--toast-success-text);
}

.gainz-toast-warning {
    background: var(--toast-warning-bg);
    border-color: var(--toast-warning-border);
    color: var(--toast-warning-text);
}

.gainz-toast-danger {
    background: var(--toast-danger-bg);
    border-color: var(--toast-danger-border);
    color: var(--toast-danger-text);
}

.gainz-toast-close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    border: none;
    background: transparent;
    color: inherit;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    padding: var(--space-1) var(--space-2);
    opacity: 0.75;
}

.gainz-toast-close:hover,
.gainz-toast-close:focus {
    opacity: 1;
}

.gainz-toast-message {
    margin: 0;
    padding-right: var(--space-5);
    font-size: 0.9375rem;
    line-height: 1.4;
}

.gainz-toast-actions {
    display: flex;
    justify-content: flex-end;
}

/* ── Site nav ────────────────────────────────── */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.site-nav-inner {
    flex-wrap: wrap;
    max-width: 1100px;
    margin: 0 auto;
}

.site-nav-brand {
    font-size: 1.35rem;
}

.site-nav-brand i {
    font-size: 1.2rem;
}

.site-nav-brand:hover {
    text-decoration: none;
}

.site-nav-toggle {
    margin-left: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    min-width: 48px;
    min-height: 48px;
    padding: 0;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 1.25rem;
}

.site-nav-toggle:hover {
    border-color: var(--muted);
}

.site-nav-menu {
    flex-basis: 100%;
}

.site-nav-menu[hidden] {
    display: none;
}

.site-nav-list {
    list-style: none;
    margin: 0;
    padding: var(--space-2) 0 0;
}

.site-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 44px;
    padding: var(--space-2) var(--space-3);
    color: var(--text);
    text-decoration: none;
    border-radius: 10px;
}

.site-nav-link:hover {
    background: var(--bg);
    text-decoration: none;
}

.site-nav-link.is-active {
    color: var(--primary);
    font-weight: 700;
}

.site-nav-link i {
    width: 1.25rem;
    text-align: center;
    color: var(--muted);
}

.site-nav-link.is-active i {
    color: var(--primary);
}

.site-nav-link-btn {
    width: 100%;
    border: none;
    background: none;
    cursor: pointer;
    font: inherit;
    text-align: left;
}

@media (min-width: 768px) {
    .site-nav-inner {
        flex-wrap: nowrap;
    }

    .site-nav-toggle {
        display: none;
    }

    .site-nav-menu {
        flex-basis: auto;
        margin-left: auto;
    }

    .site-nav-menu[hidden] {
        display: block;
    }

    .site-nav-list {
        display: flex;
        align-items: center;
        gap: var(--space-1);
        padding: 0;
    }

    .site-nav-link {
        display: inline-flex;
        min-height: auto;
        white-space: nowrap;
    }

    .site-nav-link-btn {
        width: auto;
    }
}

/* ── Visibility ──────────────────────────────── */

.hidden {
    display: none;
}