/* ── Custom session builder ─────────────────────────────────────────────── */

.custom-hero {
    padding: var(--size-8) 0 var(--size-5);
}

.custom-hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 2.6rem);
    margin: var(--size-2) 0 0;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.custom-lede {
    margin: var(--size-3) 0 0;
    color: var(--site-text-muted);
    max-width: 52ch;
    line-height: 1.75;
    font-size: 1rem;
}

/* ── Shell layout ───────────────────────────────────────────────────────── */

.custom-shell {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--size-5);
    align-items: start;
}

/* ── Builder panel ──────────────────────────────────────────────────────── */

.builder-panel {
    padding: clamp(var(--size-5), 3vw, var(--size-6));
    display: flex;
    flex-direction: column;
    gap: var(--size-6);
}

.builder-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--size-4);
    padding-bottom: var(--size-4);
    border-bottom: 1px solid var(--site-border);
}

.builder-title {
    margin: 0;
    font-size: 1.15rem;
    font-weight: var(--font-weight-7);
}

/* Duration stepper */
.duration-row {
    display: flex;
    align-items: center;
    gap: var(--size-3);
    font-size: 0.88rem;
    color: var(--site-text-muted);
}

.duration-input-wrap {
    display: flex;
    align-items: center;
    gap: var(--size-2);
    background: var(--gray-0);
    border: 1px solid var(--site-border);
    border-radius: var(--radius-round);
    padding: 0.15rem 0.4rem;
    box-shadow: 0 0 0 1px var(--site-border) inset;
}

[data-theme="renew"] .duration-input-wrap {
    background: rgba(15,23,42,0.6);
}

.dur-btn {
    width: 1.9rem;
    height: 1.9rem;
    border: none;
    background: var(--site-panel-strong);
    font-size: 1rem;
    cursor: pointer;
    color: var(--site-text-muted);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s var(--ease-out);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    line-height: 1;
}

.dur-btn:hover {
    background: var(--gray-1);
    color: var(--site-text);
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    transform: translateY(-1px);
}

[data-theme="renew"] .dur-btn {
    background: rgba(15,23,42,0.5);
}

.dur-btn:active {
    transform: scale(0.95);
}

.dur-display {
    min-width: 4.5ch;
    text-align: center;
    font-size: 0.88rem;
    font-weight: var(--font-weight-7);
    color: var(--site-text);
    font-variant-numeric: tabular-nums;
}

/* ── Phase blocks ───────────────────────────────────────────────────────── */

.phases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--size-5);
}

.phase-block {
    display: flex;
    flex-direction: column;
    gap: var(--size-3);
    padding: var(--size-3);
    border-radius: var(--radius-3);
    background: var(--site-panel);
    border: 1px solid transparent;
    transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), background var(--duration-slow);
}

[data-theme="renew"] .phase-block {
    background: rgba(15,23,42,0.4);
}

.phase-block:hover {
    border-color: var(--site-border-strong);
    box-shadow: var(--shadow-sm);
}

.phase-block-header {
    display: flex;
    align-items: center;
    gap: var(--size-2);
}

.phase-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 0 2px var(--site-border) inset;
}

.dot-in    { background: var(--indigo-5); }
[data-theme="renew"] .dot-in { background: var(--teal-5); }

.dot-hold  { background: var(--orange-5); }
.dot-out   { background: var(--teal-5);   }
[data-theme="renew"] .dot-out { background: var(--cyan-5); }

.dot-hold2 { background: var(--violet-5); }
[data-theme="renew"] .dot-hold2 { background: var(--sky-5); }

.phase-block-label {
    font-weight: var(--font-weight-6);
    font-size: 0.95rem;
    flex: 1;
}

.phase-sublabel {
    font-weight: var(--font-weight-4);
    color: var(--site-text-muted);
    font-size: 0.85em;
}

.phase-value {
    font-size: 1.1rem;
    font-weight: var(--font-weight-8);
    font-variant-numeric: tabular-nums;
    min-width: 3ch;
    text-align: right;
}

.phase-block-in    .phase-value { color: var(--indigo-7); }
[data-theme="renew"] .phase-block-in    .phase-value { color: var(--teal-6); }

.phase-block-hold  .phase-value { color: var(--orange-7); }
.phase-block-out   .phase-value { color: var(--teal-7);   }
[data-theme="renew"] .phase-block-out   .phase-value { color: var(--cyan-5); }

.phase-block-hold2 .phase-value { color: var(--violet-7); }
[data-theme="renew"] .phase-block-hold2 .phase-value { color: var(--sky-5); }

/* Sliders */
.phase-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 7px;
    border-radius: var(--radius-round);
    outline: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.phase-slider:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.slider-in {
    background: linear-gradient(to right, var(--indigo-5) var(--pct, 7%), var(--gray-2) var(--pct, 7%));
}
[data-theme="renew"] .slider-in {
    background: linear-gradient(to right, var(--teal-6) var(--pct, 7%), var(--gray-2) var(--pct, 7%));
}

.slider-hold {
    background: linear-gradient(to right, var(--orange-5) var(--pct, 0%), var(--gray-2) var(--pct, 0%));
}

.slider-out {
    background: linear-gradient(to right, var(--teal-5) var(--pct, 7%), var(--gray-2) var(--pct, 7%));
}
[data-theme="renew"] .slider-out {
    background: linear-gradient(to right, var(--cyan-5) var(--pct, 7%), var(--gray-2) var(--pct, 7%));
}

.slider-hold2 {
    background: linear-gradient(to right, var(--violet-5) var(--pct, 0%), var(--gray-2) var(--pct, 0%));
}
[data-theme="renew"] .slider-hold2 {
    background: linear-gradient(to right, var(--sky-5) var(--pct, 0%), var(--gray-2) var(--pct, 0%));
}

.phase-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--site-panel-strong);
    border: 2px solid var(--gray-4);
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.phase-slider::-webkit-slider-thumb:hover,
.phase-slider:focus::-webkit-slider-thumb {
    transform: scale(1.1);
}

.slider-in::-webkit-slider-thumb   { border-color: var(--indigo-5); }
[data-theme="renew"] .slider-in::-webkit-slider-thumb { border-color: var(--teal-5); }

.slider-hold::-webkit-slider-thumb { border-color: var(--orange-5); }
.slider-out::-webkit-slider-thumb  { border-color: var(--teal-5);   }
[data-theme="renew"] .slider-out::-webkit-slider-thumb  { border-color: var(--cyan-5); }

.slider-in:focus::-webkit-slider-thumb,
.slider-in::-webkit-slider-thumb:hover {
    box-shadow: 0 0 0 5px var(--accent-a12), 0 2px 8px rgba(0,0,0,0.12);
}

.slider-hold:focus::-webkit-slider-thumb,
.slider-hold::-webkit-slider-thumb:hover {
    box-shadow: 0 0 0 5px rgba(249,115,22,0.12), 0 2px 8px rgba(0,0,0,0.12);
}

.slider-out:focus::-webkit-slider-thumb,
.slider-out::-webkit-slider-thumb:hover {
    box-shadow: 0 0 0 5px rgba(20,184,166,0.12), 0 2px 8px rgba(0,0,0,0.12);
}

.phase-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--site-panel-strong);
    border: 2px solid var(--gray-4);
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    cursor: pointer;
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--site-text-muted);
    padding: 0 4px;
    pointer-events: none;
    user-select: none;
}

/* ── Preview bar ────────────────────────────────────────────────────────── */

.preview-section {
    background: var(--gray-0);
    border: 1px solid var(--site-border);
    border-radius: var(--radius-3);
    padding: var(--size-4);
    display: flex;
    flex-direction: column;
    gap: var(--size-3);
}

[data-theme="renew"] .preview-section {
    background: rgba(15,23,42,0.5);
}

.preview-label {
    margin: 0;
    font-size: 0.75rem;
    font-weight: var(--font-weight-7);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--site-text-muted);
}

.preview-bar {
    display: flex;
    height: 30px;
    border-radius: var(--radius-2);
    overflow: hidden;
    gap: 2px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06) inset;
}

.pb-seg {
    border-radius: var(--radius-2);
    transition: flex 0.4s var(--ease-out);
    min-width: 2px;
    box-shadow: 0 0 0 1px var(--site-border) inset;
}

.pb-in    { background: linear-gradient(135deg, var(--indigo-5), var(--indigo-6)); flex: 4; }
[data-theme="renew"] .pb-in { background: linear-gradient(135deg, var(--teal-6), var(--teal-5)); }

.pb-hold  { background: linear-gradient(135deg, var(--orange-4), var(--orange-5)); flex: 0; }
.pb-out   { background: linear-gradient(135deg, var(--teal-5), var(--teal-6));   flex: 4; }
[data-theme="renew"] .pb-out { background: linear-gradient(135deg, var(--cyan-5), var(--cyan-6)); }

.pb-hold2 { background: linear-gradient(135deg, var(--violet-4), var(--violet-5)); flex: 0; }
[data-theme="renew"] .pb-hold2 { background: linear-gradient(135deg, var(--sky-4), var(--sky-5)); }

.preview-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--size-2) var(--size-3);
    font-size: 0.82rem;
    color: var(--site-text-muted);
    align-items: center;
}

.ps-item {
    display: flex;
    align-items: center;
    gap: 0.35em;
}

.ps-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px var(--site-border) inset;
}

.ps-divider {
    color: var(--gray-4);
    font-weight: var(--font-weight-3);
}

/* ── Builder actions ────────────────────────────────────────────────────── */

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

.btn-start-custom {
    display: inline-flex;
    align-items: center;
    gap: var(--size-2);
    padding: 0.8rem 2rem;
    border-radius: var(--radius-3);
    background: linear-gradient(135deg, var(--site-accent), var(--site-secondary));
    color: white;
    font-weight: var(--font-weight-7);
    text-decoration: none;
    box-shadow: 0 4px 20px var(--accent-a35), 0 0 0 1px var(--site-border) inset;
    font-size: 1rem;
    transition: all 0.2s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn-start-custom::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn-start-custom:hover {
    background: linear-gradient(135deg, var(--site-accent-strong), var(--site-secondary-strong));
    transform: translateY(-2px);
    box-shadow: 0 6px 26px var(--accent-a50);
}

.btn-start-custom:hover::after {
    opacity: 1;
}

.btn-start-custom:active {
    transform: translateY(0) scale(0.98);
}

/* ── Presets panel ──────────────────────────────────────────────────────── */

.presets-panel {
    padding: var(--size-5);
    display: flex;
    flex-direction: column;
    gap: var(--size-4);
    position: sticky;
    top: var(--size-5);
}

.presets-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--size-3);
    padding-bottom: var(--size-3);
    border-bottom: 1px solid var(--site-border);
}

.presets-title {
    margin: 0;
    font-size: 1rem;
    font-weight: var(--font-weight-7);
}

.btn-save-preset {
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--indigo-4);
    border-radius: var(--radius-round);
    background: var(--accent-a6);
    color: var(--indigo-7);
    font: inherit;
    font-size: 0.82rem;
    font-weight: var(--font-weight-6);
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    white-space: nowrap;
}

[data-theme="renew"] .btn-save-preset {
    border-color: var(--teal-5);
    color: var(--teal-5);
    background: rgba(20,184,166,0.08);
}

.btn-save-preset:hover {
    background: var(--accent-a12);
    border-color: var(--indigo-5);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

[data-theme="renew"] .btn-save-preset:hover {
    border-color: var(--teal-4);
    background: rgba(20,184,166,0.15);
}

.btn-save-preset:active {
    transform: translateY(0) scale(0.98);
}

/* Save form */
.save-form {
    display: flex;
    flex-direction: column;
    gap: var(--size-2);
    padding: var(--size-3);
    background: var(--gray-0);
    border: 1px solid var(--site-border);
    border-radius: var(--radius-3);
    animation: slideDown 0.2s var(--ease-out);
}

[data-theme="renew"] .save-form {
    background: rgba(15,23,42,0.5);
}

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

.preset-name-input {
    width: 100%;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--gray-3);
    border-radius: var(--radius-2);
    font: inherit;
    font-size: 0.9rem;
    background: var(--site-panel-strong);
    color: var(--site-text);
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.preset-name-input:focus {
    border-color: var(--site-accent);
    box-shadow: 0 0 0 3px var(--focus-shadow);
}

.save-form-btns {
    display: flex;
    gap: var(--size-2);
}

.btn-confirm-save {
    flex: 1;
    padding: 0.5rem 0;
    border: none;
    border-radius: var(--radius-2);
    background: var(--site-accent);
    color: white;
    font: inherit;
    font-size: 0.85rem;
    font-weight: var(--font-weight-6);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.btn-confirm-save:hover { background: var(--site-accent-strong); transform: translateY(-1px); }
.btn-confirm-save:active { transform: translateY(0) scale(0.98); }

.btn-cancel-save {
    flex: 1;
    padding: 0.5rem 0;
    border: 1px solid var(--site-border);
    border-radius: var(--radius-2);
    background: transparent;
    color: var(--site-text-muted);
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-cancel-save:hover { background: var(--gray-1); }

/* Preset list */
.preset-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--size-2);
}

.preset-item {
    display: flex;
    align-items: center;
    gap: var(--size-2);
    padding: var(--size-3);
    border: 1px solid var(--site-border);
    border-radius: var(--radius-3);
    background: var(--site-panel);
    transition: all 0.2s var(--ease-out);
    cursor: pointer;
    animation: slideDown 0.18s var(--ease-out);
}

[data-theme="renew"] .preset-item {
    background: rgba(15,23,42,0.4);
}

.preset-item:hover {
    border-color: var(--indigo-4);
    background: var(--accent-a4);
    transform: translateX(3px);
    box-shadow: var(--shadow-sm);
}

[data-theme="renew"] .preset-item:hover {
    border-color: var(--teal-5);
    background: rgba(20,184,166,0.06);
}

.preset-item-info {
    flex: 1;
    min-width: 0;
}

.preset-item-name {
    font-size: 0.9rem;
    font-weight: var(--font-weight-6);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preset-item-pattern {
    font-size: 0.75rem;
    color: var(--site-text-muted);
    margin-top: 1px;
    font-variant-numeric: tabular-nums;
}

.preset-item-btns {
    display: flex;
    gap: var(--size-1);
    flex-shrink: 0;
}

.pi-btn {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: var(--radius-2);
    background: transparent;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--site-text-muted);
    transition: all 0.15s var(--ease-out);
}

.pi-btn:hover { background: var(--gray-2); color: var(--site-text); transform: scale(1.1); }

.pi-btn-load { color: var(--indigo-6); }
.pi-btn-load:hover { background: var(--accent-a10); color: var(--indigo-7); }

[data-theme="renew"] .pi-btn-load { color: var(--teal-5); }
[data-theme="renew"] .pi-btn-load:hover { background: rgba(20,184,166,0.1); color: var(--teal-4); }

.pi-btn-start { color: var(--teal-7); }
.pi-btn-start:hover { background: rgba(20,184,166,0.1); color: var(--teal-8); }

.pi-btn-delete { color: var(--red-5); }
.pi-btn-delete:hover { background: rgba(239,68,68,0.08); color: var(--red-7); }

.presets-empty {
    margin: 0;
    font-size: 0.85rem;
    color: var(--site-text-muted);
    line-height: 1.7;
    text-align: center;
    padding: var(--size-4) 0;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 760px) {
    .custom-shell {
        grid-template-columns: 1fr;
    }

    .presets-panel {
        position: static;
    }
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}