/* ============================================================
   Đồng hồ Online — 6 tools
   ============================================================ */

/* ---------- Tool 1: Real-time clock ---------- */
.dh-rt {
    text-align: center;
    padding: var(--vjol-space-5);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: var(--vjol-radius-lg);
    transition: background 0.3s;
}
.dh-rt.is-dark { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #f1f5f9; }
.dh-rt__main { display: flex; flex-direction: column; align-items: center; gap: var(--vjol-space-3); }
.dh-rt__digital {
    font-size: clamp(3rem, 12vw, 6rem); font-weight: 800;
    font-family: ui-monospace, monospace; letter-spacing: -0.02em;
    color: #1e3a8a; line-height: 1;
}
.dh-rt.is-dark .dh-rt__digital { color: #60a5fa; }
.dh-rt__meta { display: flex; gap: var(--vjol-space-3); flex-wrap: wrap; justify-content: center; font-size: var(--vjol-fs-base); color: var(--vjol-color-text-muted); }
.dh-rt.is-dark .dh-rt__meta { color: #94a3b8; }
.dh-rt__analog { width: 240px; max-width: 60vw; height: auto; }
.dh-analog__face { fill: none; stroke: currentColor; stroke-width: 2; opacity: 0.4; }
.dh-analog__mark { stroke: currentColor; stroke-width: 2; opacity: 0.6; }
.dh-analog__hr { stroke: currentColor; stroke-width: 5; stroke-linecap: round; transform-origin: 100px 100px; }
.dh-analog__min { stroke: currentColor; stroke-width: 3; stroke-linecap: round; transform-origin: 100px 100px; }
.dh-analog__sec { stroke: #ef4444; stroke-width: 2; stroke-linecap: round; transform-origin: 100px 100px; }
.dh-analog__pin { fill: currentColor; }
.dh-rt__actions { display: flex; gap: var(--vjol-space-2); justify-content: center; margin-top: var(--vjol-space-4); flex-wrap: wrap; }

/* ---------- Tool 2: Stopwatch ---------- */
.sw { text-align: center; }
.sw__display {
    font-size: clamp(2.5rem, 10vw, 5rem); font-weight: 800;
    font-family: ui-monospace, monospace;
    color: #1e3a8a; margin: var(--vjol-space-4) 0;
    letter-spacing: -0.02em;
}
.sw__actions { display: flex; gap: var(--vjol-space-2); justify-content: center; flex-wrap: wrap; margin-bottom: var(--vjol-space-4); }
.sw__laps { list-style: none; padding: 0; margin: 0; max-height: 360px; overflow-y: auto; }
.sw__lap {
    display: grid; grid-template-columns: 80px 1fr 1fr;
    padding: var(--vjol-space-2) var(--vjol-space-3);
    border-bottom: 1px solid var(--vjol-color-border);
    font-family: ui-monospace, monospace;
    font-size: var(--vjol-fs-sm); text-align: left;
}
.sw__lap:nth-child(odd) { background: var(--vjol-color-surface-2); }
.sw__lap.is-best { background: #d1fae5; color: #065f46; font-weight: 600; }
.sw__lap.is-worst { background: #fee2e2; color: #991b1b; }
.sw__lap-idx { font-weight: 600; }
.sw__lap-split, .sw__lap-total { text-align: right; }

/* ---------- Tool 3: Countdown Timer ---------- */
.ct { text-align: center; }
.ct__display {
    font-size: clamp(2.5rem, 11vw, 5.5rem); font-weight: 800;
    font-family: ui-monospace, monospace;
    color: #1e3a8a; margin: var(--vjol-space-3) 0;
    letter-spacing: -0.02em;
}
.ct.is-done .ct__display { color: #ef4444; animation: ct-flash 0.5s ease-in-out 6; }
@keyframes ct-flash { 50% { opacity: 0.3; } }
.ct__inputs { display: flex; gap: var(--vjol-space-3); justify-content: center; margin: var(--vjol-space-3) 0; }
.ct__input-group { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.ct__input-group span { font-size: var(--vjol-fs-xs); color: var(--vjol-color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.ct__input-group input {
    width: 80px; text-align: center; font-size: 1.5rem; padding: var(--vjol-space-2);
    border: 1px solid var(--vjol-color-border); border-radius: var(--vjol-radius-md);
    font-family: ui-monospace, monospace;
}
.ct__presets { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin: var(--vjol-space-3) 0; }
.ct__preset {
    appearance: none; background: var(--vjol-color-surface-2);
    border: 1px solid var(--vjol-color-border); border-radius: var(--vjol-radius-md);
    padding: 6px 14px; font: inherit; font-size: var(--vjol-fs-sm); cursor: pointer;
}
.ct__preset:hover { background: var(--vjol-color-border); }
.ct__actions { display: flex; gap: var(--vjol-space-2); justify-content: center; flex-wrap: wrap; margin: var(--vjol-space-3) 0; }
.ct__progress { background: var(--vjol-color-surface-2); border-radius: 999px; height: 10px; overflow: hidden; margin-top: var(--vjol-space-3); }
.ct__bar { background: linear-gradient(90deg, #1e3a8a, #f59e0b); height: 100%; transition: width 0.1s linear; width: 100%; }

/* ---------- Tool 4: Pomodoro ---------- */
.pomo { text-align: center; transition: background 0.3s; padding: var(--vjol-space-5); border-radius: var(--vjol-radius-lg); }
.pomo.is-work { background: linear-gradient(135deg, #fef2f2, #fee2e2); }
.pomo.is-short { background: linear-gradient(135deg, #ecfdf5, #d1fae5); }
.pomo.is-long { background: linear-gradient(135deg, #eff6ff, #dbeafe); }
.pomo__phase { font-size: var(--vjol-fs-xl); font-weight: 600; margin-bottom: var(--vjol-space-2); }
.pomo__display {
    font-size: clamp(3rem, 12vw, 6rem); font-weight: 800;
    font-family: ui-monospace, monospace;
    line-height: 1; margin: var(--vjol-space-3) 0;
}
.pomo__progress { background: rgba(255,255,255,0.6); border-radius: 999px; height: 8px; overflow: hidden; margin: var(--vjol-space-3) 0; }
.pomo__bar { background: rgba(0,0,0,0.4); height: 100%; transition: width 0.5s; }
.pomo__cycle { display: flex; align-items: center; justify-content: center; gap: var(--vjol-space-3); margin: var(--vjol-space-3) 0; font-size: var(--vjol-fs-sm); }
.pomo__dots { display: inline-flex; gap: 6px; }
.pomo__dot { width: 12px; height: 12px; border-radius: 50%; border: 2px solid rgba(0,0,0,0.3); }
.pomo__dot.is-done { background: rgba(0,0,0,0.6); }
.pomo__actions { display: flex; gap: var(--vjol-space-2); justify-content: center; flex-wrap: wrap; }
.pomo__settings { margin-top: var(--vjol-space-4); text-align: left; }
.pomo__settings summary { cursor: pointer; font-size: var(--vjol-fs-sm); color: var(--vjol-color-text-muted); }
.pomo__settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--vjol-space-2); margin-top: var(--vjol-space-2); }
.pomo__settings-grid label { display: flex; flex-direction: column; gap: 4px; font-size: var(--vjol-fs-sm); }
.pomo__settings-grid input { padding: 6px; border: 1px solid var(--vjol-color-border); border-radius: var(--vjol-radius-sm); font: inherit; }

/* ---------- Tool 5: Alarm ---------- */
.alm__current { text-align: center; margin-bottom: var(--vjol-space-4); }
.alm__current-label { color: var(--vjol-color-text-muted); margin-right: 6px; }
.alm__current-time { font-family: ui-monospace, monospace; font-size: var(--vjol-fs-xl); font-weight: 700; color: #1e3a8a; }
.alm__add { background: var(--vjol-color-surface-2); padding: var(--vjol-space-3); border-radius: var(--vjol-radius-md); margin-bottom: var(--vjol-space-4); }
.alm__add-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--vjol-space-3); margin-bottom: var(--vjol-space-3); }
@media (max-width: 600px) { .alm__add-grid { grid-template-columns: 1fr; } }
.alm__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--vjol-space-2); }
.alm__empty { text-align: center; color: var(--vjol-color-text-muted); font-style: italic; padding: var(--vjol-space-4); }
.alm__item {
    display: grid; grid-template-columns: auto 1fr auto auto;
    gap: var(--vjol-space-3); align-items: center;
    padding: var(--vjol-space-3); border: 1px solid var(--vjol-color-border); border-radius: var(--vjol-radius-md);
}
.alm__item.is-off { opacity: 0.5; }
.alm__time { font-family: ui-monospace, monospace; font-size: 1.5rem; font-weight: 700; color: #1e3a8a; }
.alm__label { color: var(--vjol-color-text-muted); font-size: var(--vjol-fs-sm); }
.alm__toggle input { width: 18px; height: 18px; }
.alm__del { appearance: none; background: transparent; border: 0; color: var(--vjol-color-danger); font-size: 24px; cursor: pointer; line-height: 1; }
.alm__ringing { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,0.7); display: flex; align-items: center; justify-content: center; padding: var(--vjol-space-4); animation: alm-shake 0.5s infinite; }
.alm__ringing-box { background: #fff; padding: var(--vjol-space-6); border-radius: var(--vjol-radius-lg); text-align: center; max-width: 400px; }
.alm__ringing-icon { font-size: 4rem; }
.alm__ringing-text { font-size: var(--vjol-fs-xl); font-weight: 600; margin: var(--vjol-space-3) 0; }
.alm__ringing-actions { display: flex; gap: var(--vjol-space-2); justify-content: center; flex-wrap: wrap; }
@keyframes alm-shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

/* ---------- Tool 6: World Clock ---------- */
.wc__list { display: flex; flex-direction: column; gap: var(--vjol-space-4); }
.wc__region-title { font-size: var(--vjol-fs-base); color: var(--vjol-color-text-muted); margin: 0 0 var(--vjol-space-2); text-transform: uppercase; letter-spacing: 0.05em; }
.wc__cities { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--vjol-space-2); }
.wc__city {
    display: grid; grid-template-columns: auto 1fr auto;
    gap: var(--vjol-space-3); align-items: center;
    padding: var(--vjol-space-3); background: var(--vjol-color-surface-2);
    border-radius: var(--vjol-radius-md); border: 1px solid var(--vjol-color-border);
}
.wc__flag { font-size: 1.8rem; }
.wc__city-name { font-weight: 600; }
.wc__country { font-size: var(--vjol-fs-xs); color: var(--vjol-color-text-muted); }
.wc__time { text-align: right; }
.wc__hms { font-family: ui-monospace, monospace; font-size: 1.3rem; font-weight: 700; color: #1e3a8a; line-height: 1; }
.wc__date { font-size: var(--vjol-fs-xs); color: var(--vjol-color-text-muted); margin-top: 2px; }
.wc__offset { margin-left: 4px; font-weight: 600; }

/* ---------- Select field ---------- */

.calc-field select {
    flex: 1;
    min-width: 0;
    padding: var(--vjol-space-3) var(--vjol-space-4);
    background: transparent;
    border: 0;
    font-size: var(--vjol-fs-base);
    color: var(--vjol-color-text);
    border-radius: var(--vjol-radius-md);
    cursor: pointer;
    appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
                      linear-gradient(135deg, currentColor 50%, transparent 50%);
    background-position: calc(100% - 18px) calc(50% - 2px),
                         calc(100% - 13px) calc(50% - 2px);
    background-size: 5px 5px;
    background-repeat: no-repeat;
    padding-right: var(--vjol-space-10);
}

/* ---------- Dynamic rows (điểm trung bình) ---------- */

.calc-rows {
    display: flex;
    flex-direction: column;
    gap: var(--vjol-space-3);
    margin-bottom: var(--vjol-space-5);
}

.calc-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--vjol-space-3);
    align-items: end;
    padding: var(--vjol-space-3);
    background: var(--vjol-color-surface);
    border-radius: var(--vjol-radius-md);
}

@media (min-width: 640px) {
    .calc-row { grid-template-columns: 2fr 1fr 1fr auto; }
}

.calc-row__remove {
    width: 36px;
    height: 36px;
    border-radius: var(--vjol-radius-full);
    background: var(--vjol-color-bg);
    color: var(--vjol-color-danger);
    font-size: var(--vjol-fs-xl);
    line-height: 1;
    border: 1px solid var(--vjol-color-border);
    transition: background-color var(--vjol-duration-fast) var(--vjol-ease-out),
                color var(--vjol-duration-fast) var(--vjol-ease-out);
    align-self: end;
    margin-bottom: var(--vjol-space-2);
    cursor: pointer;
}
.calc-row__remove:hover {
    background: var(--vjol-color-danger);
    color: var(--vjol-c-white);
    border-color: var(--vjol-color-danger);
}

/* ---------- Field ---------- */

.calc-field {
    display: flex;
    flex-direction: column;
    gap: var(--vjol-space-2);
}

.calc-field__label {
    font-size: var(--vjol-fs-sm);
    font-weight: var(--vjol-fw-semibold);
    color: var(--vjol-color-heading);
}

.calc-field__input {
    position: relative;
    display: flex;
    align-items: stretch;
    border: 1px solid var(--vjol-color-border);
    border-radius: var(--vjol-radius-md);
    background: var(--vjol-color-bg);
    transition: border-color var(--vjol-duration-fast) var(--vjol-ease-out),
                box-shadow var(--vjol-duration-fast) var(--vjol-ease-out);
}

.calc-field__input:focus-within {
    border-color: var(--vjol-color-primary);
    box-shadow: 0 0 0 3px var(--vjol-color-primary-soft);
}

.calc-field input,
.calc-field select,
.calc-field textarea {
    flex: 1;
    min-width: 0;
    padding: var(--vjol-space-3) var(--vjol-space-4);
    background: transparent;
    border: 0;
    font-size: var(--vjol-fs-base);
    color: var(--vjol-color-text);
    border-radius: var(--vjol-radius-md);
}

.calc-field input:focus,
.calc-field select:focus,
.calc-field textarea:focus { outline: none; }

.calc-field__unit {
    display: inline-flex;
    align-items: center;
    padding-inline: var(--vjol-space-4);
    background: var(--vjol-color-surface);
    color: var(--vjol-color-text-muted);
    font-size: var(--vjol-fs-sm);
    font-weight: var(--vjol-fw-medium);
    border-inline-start: 1px solid var(--vjol-color-border);
    border-start-end-radius: var(--vjol-radius-md);
    border-end-end-radius: var(--vjol-radius-md);
}

.calc-field--error .calc-field__input {
    border-color: var(--vjol-color-danger);
}
.calc-field__error {
    font-size: var(--vjol-fs-xs);
    color: var(--vjol-color-danger);
    margin: 0;
}

/* ---------- Result ---------- */

.calc-widget__result {
    margin-top: var(--vjol-space-6);
    padding: var(--vjol-space-5);
    background: var(--vjol-color-surface);
    border-radius: var(--vjol-radius-md);
    border-inline-start: 4px solid var(--vjol-color-primary);
}

.calc-widget__result[hidden] { display: none !important; }

.calc-result__value {
    font-size: var(--vjol-fs-3xl);
    font-weight: var(--vjol-fw-bold);
    color: var(--vjol-color-heading);
    line-height: var(--vjol-lh-tight);
    margin: 0 0 var(--vjol-space-2);
}

.calc-result__label {
    font-size: var(--vjol-fs-sm);
    color: var(--vjol-color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.calc-result__note {
    margin: var(--vjol-space-3) 0 0;
    color: var(--vjol-color-text);
    font-size: var(--vjol-fs-base);
}

.calc-result__category {
    display: inline-flex;
    padding: var(--vjol-space-1) var(--vjol-space-3);
    background: var(--vjol-color-primary-soft);
    color: var(--vjol-color-primary);
    border-radius: var(--vjol-radius-full);
    font-weight: var(--vjol-fw-semibold);
    font-size: var(--vjol-fs-sm);
    margin-top: var(--vjol-space-2);
}

/* category variants */
.calc-result__category--success { background: rgb(22 163 74 / 0.1); color: var(--vjol-c-success); }
.calc-result__category--warning { background: rgb(217 119 6 / 0.1); color: var(--vjol-c-warning); }
.calc-result__category--danger  { background: rgb(220 38 38 / 0.1); color: var(--vjol-c-danger); }

/* ---------- Section (formula, howto, content, faq) ---------- */

.calc-section {
    margin-block: var(--vjol-space-10);
}

.calc-section__heading {
    margin: 0 0 var(--vjol-space-4);
}

.calc-section__body.wysiwyg {
    line-height: var(--vjol-lh-loose);
}

.calc-section__body.wysiwyg > * + * {
    margin-top: var(--vjol-space-3);
}

.calc-section__body.wysiwyg h3,
.calc-section__body.wysiwyg h4 {
    margin-block: var(--vjol-space-6) var(--vjol-space-3);
    font-weight: 700;
    color: var(--vjol-color-text);
}

.calc-section__body.wysiwyg p {
    margin: 0;
}
.calc-section__body.wysiwyg p strong {
    color: var(--vjol-color-text);
}

/* Công thức trung tâm (p[style="text-align:center"] > code) */
.calc-section__body.wysiwyg p[style*="text-align:center"] {
    text-align: center;
    margin-block: var(--vjol-space-4);
}
.calc-section__body.wysiwyg p[style*="text-align:center"] code {
    display: inline-block;
    padding: var(--vjol-space-3) var(--vjol-space-5);
    background: var(--vjol-color-surface-2, #f1f5f9);
    border: 1px solid var(--vjol-color-border);
    border-radius: var(--vjol-radius-md);
    font-size: var(--vjol-fs-lg);
    color: var(--vjol-color-primary);
    font-weight: 600;
    font-family: 'Menlo', 'Consolas', monospace;
}

/* Code inline trong paragraph thường */
.calc-section__body.wysiwyg code {
    padding: 2px 6px;
    background: var(--vjol-color-surface-2, #f1f5f9);
    border-radius: var(--vjol-radius-sm);
    font-family: 'Menlo', 'Consolas', monospace;
    font-size: 0.92em;
    color: var(--vjol-color-primary);
}

/* Bảng dữ liệu (BMI, GPA, biểu thuế, codon...) — specificity cao hơn .calc-single__main table */
.calc-single__main .calc-section__body.wysiwyg table {
    display: table;
    width: auto;
    max-width: 100%;
    border-collapse: collapse;
    margin-block: var(--vjol-space-4);
    background: var(--vjol-color-surface, #fff);
    border: 1px solid var(--vjol-color-border);
    border-radius: var(--vjol-radius-md);
    overflow: hidden;
    font-size: var(--vjol-fs-sm);
}
.calc-section__body.wysiwyg table thead {
    background: var(--vjol-color-primary);
    color: #fff;
}
.calc-section__body.wysiwyg table th,
.calc-section__body.wysiwyg table td {
    padding: var(--vjol-space-2) var(--vjol-space-3);
    text-align: left;
    border-bottom: 1px solid var(--vjol-color-border);
    vertical-align: top;
}
.calc-section__body.wysiwyg table th {
    font-weight: 600;
    border-bottom-color: transparent;
}
.calc-section__body.wysiwyg table tbody tr:nth-child(even) {
    background: var(--vjol-color-surface-2, #f8fafc);
}
.calc-section__body.wysiwyg table tbody tr:hover {
    background: #fef3c7;
}
.calc-section__body.wysiwyg table tbody tr:last-child td {
    border-bottom: none;
}

/* List */
.calc-section__body.wysiwyg ul,
.calc-section__body.wysiwyg ol {
    padding-left: var(--vjol-space-5);
    display: flex;
    flex-direction: column;
    gap: var(--vjol-space-2);
}
.calc-section__body.wysiwyg ul li,
.calc-section__body.wysiwyg ol li {
    padding-left: var(--vjol-space-1);
}
.calc-section__body.wysiwyg ol > li::marker {
    color: var(--vjol-color-primary);
    font-weight: 700;
}
.calc-section__body.wysiwyg ul ul,
.calc-section__body.wysiwyg ol ol,
.calc-section__body.wysiwyg ul ol,
.calc-section__body.wysiwyg ol ul {
    margin-top: var(--vjol-space-2);
}

/* Em (italic note) */
.calc-section__body.wysiwyg em {
    color: var(--vjol-color-text-muted, #64748b);
    font-style: italic;
}

/* Responsive — bảng scroll ngang trên mobile */
@media (max-width: 640px) {
    .calc-section__body.wysiwyg table {
        display: block;
        overflow-x: auto;
    }
}

/* ---------- FAQ accordion ---------- */

.calc-faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--vjol-space-2);
}

.calc-faq__item {
    border: 1px solid var(--vjol-color-border);
    border-radius: var(--vjol-radius-md);
    background: var(--vjol-color-bg);
    overflow: hidden;
}

.calc-faq__question {
    cursor: pointer;
    padding: var(--vjol-space-4) var(--vjol-space-5);
    font-weight: var(--vjol-fw-semibold);
    color: var(--vjol-color-heading);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--vjol-space-3);
}
.calc-faq__question::-webkit-details-marker { display: none; }
.calc-faq__question::after {
    content: '';
    width: 0.55em;
    height: 0.55em;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform var(--vjol-duration-fast) var(--vjol-ease-out);
    flex-shrink: 0;
    opacity: 0.6;
}
.calc-faq__item[open] .calc-faq__question::after {
    transform: rotate(-135deg) translateY(2px);
}

.calc-faq__answer {
    padding: 0 var(--vjol-space-5) var(--vjol-space-4);
    color: var(--vjol-color-text);
    line-height: var(--vjol-lh-normal);
}
.calc-faq__answer p { margin: 0 0 var(--vjol-space-2); }
.calc-faq__answer p:last-child { margin-bottom: 0; }