:root[data-theme="dark"] {
    color-scheme: dark;
    --primary: #5f93ff;
    --primary-dark: #4d7fea;
    --background: #0f172a;
    --surface: #162033;
    --surface-soft: #1b2740;
    --text-primary: #edf4ff;
    --text-secondary: #9eacc2;
    --border: #2a3852;
    --shadow: 0 18px 44px rgba(0, 0, 0, 0.26);
}

.timer-page {
    min-height: 100vh;
    padding-bottom: 32px;
}

.timer-topbar,
.timer-layout {
    width: min(1480px, calc(100% - 48px));
    margin: 0 auto;
}

.timer-topbar {
    min-height: 92px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.timer-top-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.timer-layout {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 22px;
}

.timer-sidebar {
    min-height: calc(100vh - 128px);
}

.timer-main {
    min-width: 0;
}

.timer-heading {
    min-height: 118px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    padding: 10px 8px 22px;
}

.timer-heading h1 {
    margin: 4px 0 0;
    font-size: clamp(30px, 4vw, 42px);
    letter-spacing: -0.04em;
}

.timer-heading p:last-child {
    margin: 8px 0 0;
    color: var(--text-secondary);
}

.timer-status {
    min-width: 76px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 999px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 800;
}

.timer-status.is-running {
    color: var(--primary);
    border-color: rgba(47, 115, 255, 0.30);
}

.timer-status.is-paused {
    color: #a96a00;
    border-color: rgba(217, 144, 0, 0.28);
}

.timer-status.is-complete {
    color: #198754;
    border-color: rgba(25, 135, 84, 0.26);
}

.timer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.28fr) minmax(320px, 0.72fr);
    gap: 18px;
}

.timer-card {
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.timer-card .card-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 20px;
}

.timer-card h2 {
    margin: 5px 0 0;
    font-size: 21px;
    letter-spacing: -0.03em;
}

.timer-display-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.timer-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 9px;
    margin: 34px 0 24px;
    font-variant-numeric: tabular-nums;
}

.timer-display > span:not(.timer-separator) {
    min-width: 1.9ch;
    font-size: clamp(64px, 9vw, 118px);
    line-height: 0.94;
    font-weight: 850;
    letter-spacing: -0.07em;
}

.timer-separator {
    color: var(--primary);
    font-size: clamp(50px, 7vw, 92px);
    line-height: 1;
    font-weight: 700;
}

.timer-progress-track {
    height: 9px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
}

.timer-progress {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), #74a3ff);
    transition: width 120ms linear;
}

.timer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.primary-button,
.secondary-button {
    min-height: 46px;
    padding: 0 18px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
}

.primary-button {
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--primary), #2660df);
    color: #fff;
    box-shadow: 0 10px 20px rgba(47, 115, 255, 0.20);
}

.secondary-button {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
}

.primary-button:disabled,
.secondary-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}

.timer-note {
    margin-top: 15px;
    min-height: 22px;
    color: var(--text-secondary);
    font-size: 12px;
}

.duration-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.duration-field {
    display: grid;
    gap: 8px;
}

.duration-field label {
    font-size: 12px;
    font-weight: 800;
}

.duration-field input {
    width: 100%;
    min-height: 50px;
    padding: 0 13px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--text-primary);
    font: inherit;
    font-size: 16px;
    font-weight: 750;
    outline: none;
}

.duration-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(47, 115, 255, 0.10);
}

.timer-validation {
    min-height: 18px;
    margin: 9px 0 0;
    color: #d34b59;
    font-size: 11px;
    font-weight: 700;
}

.preset-section {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}

.preset-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}

.preset-heading strong {
    font-size: 13px;
}

.preset-heading span {
    color: var(--text-secondary);
    font-size: 11px;
}

.preset-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 11px;
}

.preset-button {
    min-height: 38px;
    padding: 0 11px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-soft);
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
}

.preset-button:hover {
    border-color: rgba(47, 115, 255, 0.30);
    color: var(--primary);
}

.timer-help {
    display: flex;
    gap: 9px;
    align-items: flex-start;
    margin-top: 18px;
    padding: 13px 15px;
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.6;
}

.timer-help strong {
    color: var(--text-primary);
}

.timer-alert {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 18px;
    margin-top: 18px;
    padding: 18px 20px;
    border: 1px solid rgba(47, 115, 255, 0.28);
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(47, 115, 255, 0.10), var(--surface));
    box-shadow: var(--shadow);
}

.timer-alert.is-hidden {
    display: none;
}

.timer-alert-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: rgba(47, 115, 255, 0.12);
    font-size: 24px;
}

.timer-alert h2 {
    margin: 4px 0 3px;
    font-size: 21px;
}

.timer-alert p:last-child {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
}

@media (max-width: 980px) {
    .timer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .timer-topbar,
    .timer-layout {
        width: min(100% - 24px, 620px);
    }

    .timer-topbar {
        min-height: 78px;
    }

    .timer-topbar .brand-copy span,
    .timer-top-actions .ghost-link {
        display: none;
    }

    .timer-layout {
        display: block;
        padding-bottom: 86px;
    }

    .timer-sidebar {
        display: none;
    }

    .timer-heading {
        min-height: auto;
        align-items: flex-start;
        flex-direction: column;
        gap: 13px;
        padding: 8px 2px 18px;
    }

    .timer-display-card,
    .timer-setup-card {
        padding: 18px 16px;
    }

    .timer-display {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 5px;
        margin: 28px 0 20px;
    }

    .timer-display > span:not(.timer-separator) {
        font-size: clamp(50px, 17vw, 88px);
    }

    .timer-separator {
        font-size: clamp(42px, 14vw, 74px);
    }

    .duration-grid {
        grid-template-columns: 1fr;
    }

    .timer-actions,
    .timer-actions button {
        width: 100%;
    }

    .timer-alert {
        grid-template-columns: 1fr;
    }

    .timer-alert .primary-button {
        width: 100%;
    }
}

@media (prefers-color-scheme: dark) {
    .duration-field input,
    .preset-button,
    .timer-help {
        background: #101c31;
    }
}