:root {
    color-scheme: light;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: var(--text);
    background: #9bbdec;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    --surface: rgba(255, 255, 255, 0.97);
    --surface-soft: #f1f6fd;
    --text: #24243a;
    --muted: #85859b;
    --line: #e7edf5;
    --primary: #78a4df;
    --primary-dark: #5d88c5;
    --accent: #f1a765;
    --danger: #e97578;
    --shadow: 0 18px 50px rgba(48, 82, 130, 0.14);
}

* {
    box-sizing: border-box;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    padding: 48px 24px;
    color: var(--text);
    background:
        radial-gradient(ellipse at 12% 8%, rgba(202, 224, 255, 0.8), transparent 38%),
        radial-gradient(ellipse at 94% 90%, rgba(150, 183, 231, 0.76), transparent 42%),
        linear-gradient(135deg, #91b5e8 0%, #8eabe0 52%, #a0b5e9 100%);
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(115, 120, 229, 0.3);
    outline-offset: 3px;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    width: min(100%, 920px);
    margin: 0 auto;
}

.card {
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: 17px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.welcome {
    grid-column: 1 / -1;
    display: flex;
    min-height: 190px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 26px 24px 24px;
    text-align: center;
}

.clock {
    margin: 0;
    color: var(--primary);
    font-family: 'Segoe UI', Arial, sans-serif;
    font-size: clamp(2.6rem, 7vw, 3.6rem);
    font-weight: 600;
    letter-spacing: -0.07em;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}

.date {
    margin: 8px 0 12px;
    color: var(--muted);
    font-size: 0.83rem;
}

.greeting-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

h1,
h2,
p {
    margin-top: 0;
}

h1,
h2 {
    font-family: 'Segoe UI', Arial, sans-serif;
}

h1 {
    margin-bottom: 0;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

.icon-button {
    display: inline-grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: var(--muted);
    background: transparent;
    opacity: 0;
    transition: background 160ms ease, opacity 160ms ease, color 160ms ease;
}

.greeting-row:hover .icon-button,
.icon-button:focus-visible {
    opacity: 1;
}

.icon-button:hover {
    color: var(--primary);
    background: var(--surface-soft);
}

.icon-button svg,
.heading-icon svg {
    width: 19px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.7;
}

.timer-card,
.tasks-card,
.links-card {
    padding: 23px 25px;
}

.timer-card {
    display: flex;
    min-height: 300px;
    flex-direction: column;
    align-items: center;
}

.section-heading {
    display: flex;
    min-height: 27px;
    align-items: center;
    gap: 9px;
    width: 100%;
}

.heading-icon {
    display: inline-grid;
    width: 28px;
    height: 28px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 9px;
    color: var(--primary);
    background: #edf4ff;
}

.heading-icon svg {
    width: 17px;
}

.tasks-icon {
    color: #e2a15f;
    background: #fff5e9;
}

.links-icon {
    color: #5eaf9d;
    background: #eaf7f3;
}

.timer-card .section-heading {
    justify-content: center;
}

.timer-mode {
    margin: 28px 0 1px;
    color: var(--muted);
    font-size: 0.78rem;
}

.timer-display {
    margin: 0;
    color: var(--primary);
    font-family: 'Segoe UI', Arial, sans-serif;
    font-size: clamp(3.6rem, 9vw, 4.5rem);
    font-weight: 600;
    letter-spacing: -0.075em;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.duration-form {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 8px 0 17px;
    color: var(--muted);
    font-size: 0.76rem;
}

.duration-control {
    display: flex;
    align-items: center;
    gap: 5px;
}

.duration-control input {
    width: 48px;
    padding: 5px 6px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--text);
    background: var(--surface);
    text-align: center;
}

.text-button {
    padding: 5px 7px;
    border: 0;
    border-radius: 6px;
    color: var(--primary-dark);
    background: #edf4ff;
    font-size: 0.75rem;
    font-weight: 700;
}

.timer-actions {
    display: flex;
    justify-content: center;
    gap: 9px;
}

.button {
    min-height: 37px;
    padding: 0 16px;
    border: 0;
    border-radius: 9px;
    font-size: 0.82rem;
    font-weight: 700;
    transition: transform 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.button:hover:not(:disabled) {
    transform: translateY(-1px);
}

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

.button-primary {
    color: #fff;
    background: var(--primary);
    box-shadow: 0 4px 10px rgba(115, 120, 229, 0.2);
}

.button-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.button-secondary {
    color: #5e6073;
    background: #f0f1f6;
}

.tasks-card {
    min-height: 300px;
}

.item-count {
    margin-left: auto;
    padding: 4px 9px;
    border-radius: 20px;
    color: var(--primary-dark);
    background: #edf4ff;
    font-size: 0.72rem;
    font-weight: 700;
}

.add-form,
.link-form {
    display: flex;
    gap: 9px;
    margin-top: 22px;
}

.add-form input,
.link-form input,
.name-dialog input {
    min-width: 0;
    height: 40px;
    padding: 0 12px;
    border: 1px solid #e2e3ee;
    border-radius: 8px;
    color: var(--text);
    background: var(--surface);
    font-size: 0.82rem;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.add-form input:focus,
.link-form input:focus,
.name-dialog input:focus {
    border-color: var(--primary);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(115, 120, 229, 0.12);
}

.add-form input {
    flex: 1;
}

.add-form .button,
.link-form .button {
    flex: 0 0 auto;
}

.form-message {
    min-height: 17px;
    margin: 5px 0 0;
    color: #c45c64;
    font-size: 0.73rem;
}

.task-list,
.link-list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.task-list:empty,
.link-list:empty {
    display: none;
}

.task-item {
    display: flex;
    min-height: 43px;
    align-items: center;
    gap: 10px;
    padding: 5px 0;
    border-bottom: 1px solid var(--line);
    animation: appear 180ms ease both;
}

.task-item:last-child {
    border-bottom: 0;
}

.task-checkbox {
    width: 17px;
    height: 17px;
    flex: 0 0 auto;
    margin: 0;
    accent-color: var(--primary);
    cursor: pointer;
}

.task-text {
    min-width: 0;
    flex: 1;
    overflow-wrap: anywhere;
    color: var(--text);
    font-size: 0.84rem;
}

.task-item.is-complete .task-text {
    color: var(--muted);
    text-decoration: line-through;
}

.delete-button {
    padding: 6px 9px;
    border: 0;
    border-radius: 7px;
    color: #fff;
    background: var(--danger);
    font-size: 0.7rem;
    font-weight: 700;
    transition: background 150ms ease;
}

.delete-button:hover {
    background: #d85f67;
}

.empty-state {
    margin: 9px 0 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.links-card {
    min-height: 190px;
}

.link-form {
    margin-top: 19px;
}

.link-form input:first-of-type {
    flex: 0 1 31%;
}

.link-form input:nth-of-type(2) {
    flex: 1;
}

.link-list {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    margin-top: 11px;
}

.link-item {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 5px;
    padding: 5px;
    border-radius: 10px;
    background: #f2f2ff;
    animation: appear 180ms ease both;
}

.link-anchor {
    display: flex;
    min-width: 0;
    flex: 1;
    align-items: center;
    gap: 8px;
    padding: 7px 6px;
    border-radius: 7px;
    color: var(--primary-dark);
    text-decoration: none;
    transition: background 150ms ease;
}

.link-anchor:hover {
    background: rgba(115, 120, 229, 0.1);
}

.link-favicon {
    display: inline-grid;
    width: 25px;
    height: 25px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 8px;
    color: var(--primary-dark);
    background: #fff;
    font-size: 0.78rem;
    font-weight: 800;
}

.link-name {
    overflow: hidden;
    font-size: 0.76rem;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remove-link {
    display: inline-grid;
    width: 24px;
    height: 24px;
    flex: 0 0 auto;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: var(--muted);
    background: transparent;
    font-size: 1rem;
    line-height: 1;
}

.remove-link:hover {
    color: #c45c64;
    background: #fff;
}

.footer {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.76rem;
}

.footer > span {
    letter-spacing: 0.02em;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 11px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    color: inherit;
    background: rgba(255, 255, 255, 0.1);
    font-size: inherit;
    transition: background 150ms ease;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.theme-icon {
    font-size: 0.95rem;
    line-height: 1;
}

.name-dialog {
    width: min(420px, calc(100% - 32px));
    padding: 0;
    border: 0;
    border-radius: 16px;
    color: var(--text);
    background: var(--surface);
    box-shadow: 0 24px 80px rgba(24, 24, 62, 0.28);
}

.name-dialog::backdrop {
    background: rgba(28, 29, 64, 0.38);
    backdrop-filter: blur(3px);
}

.name-dialog form {
    display: grid;
    gap: 12px;
    padding: 27px;
}

.name-dialog h2 {
    margin-bottom: 4px;
    font-size: 1.2rem;
}

.name-dialog label {
    color: var(--muted);
    font-size: 0.82rem;
}

.name-dialog input {
    width: 100%;
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 9px;
    margin-top: 5px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    clip-path: inset(50%);
}

@keyframes appear {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body.dark-theme {
    color-scheme: dark;
    --surface: rgba(35, 36, 57, 0.97);
    --surface-soft: #303149;
    --text: #f0f0fa;
    --muted: #a2a3bb;
    --line: #3d3e5a;
    --primary: #9dbff0;
    --primary-dark: #b7d0f3;
    --shadow: 0 18px 50px rgba(20, 36, 67, 0.3);
}

body.dark-theme {
    background:
        radial-gradient(ellipse at 12% 8%, rgba(63, 93, 139, 0.65), transparent 38%),
        radial-gradient(ellipse at 94% 90%, rgba(65, 91, 138, 0.72), transparent 42%),
        linear-gradient(135deg, #263653 0%, #304361 52%, #394c70 100%);
}

.dark-theme .heading-icon,
.dark-theme .item-count,
.dark-theme .text-button,
.dark-theme .link-item {
    background: #343f57;
}

.dark-theme .tasks-icon {
    color: #f1bb7c;
    background: #493f39;
}

.dark-theme .links-icon {
    color: #84ccb9;
    background: #2e4546;
}

.dark-theme .button-secondary {
    color: var(--text);
    background: #3f4a61;
}

.dark-theme .link-favicon {
    background: #44516b;
}

.dark-theme .remove-link:hover {
    background: #44516b;
}

.dark-theme .duration-control input,
.dark-theme .add-form input,
.dark-theme .link-form input,
.dark-theme .name-dialog input {
    border-color: var(--line);
}

@media (max-width: 660px) {
    body {
        padding: 24px 15px;
    }

    .dashboard {
        gap: 14px;
    }

    .welcome {
        min-height: 160px;
    }

    .timer-card,
    .tasks-card,
    .links-card {
        padding: 20px;
    }

    .timer-card,
    .tasks-card {
        grid-column: 1 / -1;
        min-height: auto;
    }

    .timer-card {
        padding-bottom: 24px;
    }

    .links-card {
        grid-column: 1 / -1;
    }

    .footer {
        padding-top: 2px;
    }
}

@media (max-width: 420px) {
    .add-form,
    .link-form {
        flex-wrap: wrap;
    }

    .add-form input {
        flex-basis: calc(100% - 100px);
    }

    .link-form input:first-of-type {
        flex: 1 1 35%;
    }

    .link-form input:nth-of-type(2) {
        flex: 1 1 45%;
    }

    .link-form .button {
        margin-left: auto;
    }

    .footer {
        font-size: 0.69rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}