*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:root {
    --bg: #ffffff;
    --fg: #1f2937;
    --muted: #e5e7eb;
    --placeholder: #cbd1d8;
    --start: #2e7d32;
    --pause: #1f2937;
    --stop: #c62828;
    --effect-color: #2f6feb;
    /* Filled-button & derived text (overwritten by themes.js from luminance) */
    --on-start: #ffffff;
    --on-pause: #ffffff;
    --on-stop: #ffffff;
    --on-fg: #ffffff;
    --toast-fg: var(--fg);
    --link-on-bg: var(--fg);
}

html {
    color-scheme: light dark;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    transition:
        background-color 0.25s ease,
        color 0.25s ease;
}

.particle-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    transition: opacity 0.35s ease;
}

body.timer-running-active .particle-layer {
    opacity: 0.35;
}

.clock-section,
.timer-section {
    position: relative;
    z-index: 1;
}

/* Settings */
.settings-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 998;
    backdrop-filter: blur(2px);
}

/* Gear hides completely at idle. Any mouse movement, keyboard focus, or the
   panel being open brings it back so the UI is literally just timer + text
   when the user is not interacting. */
.settings-corner {
    position: fixed;
    top: 0;
    left: 0;
    width: 84px;
    height: 84px;
    z-index: 1000;
    pointer-events: auto;
}

.settings-toggle {
    position: absolute;
    top: 12px;
    left: 12px;
    width: 40px;
    height: 40px;
    padding: 8px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--fg);
    opacity: 0;
    cursor: pointer;
    transition:
        opacity 0.35s ease,
        background-color 0.2s ease;
}

body.ui-active .settings-toggle,
.settings-corner:hover .settings-toggle,
.settings-corner:focus-within .settings-toggle,
body:has(.settings-panel.is-open) .settings-toggle {
    opacity: 0.6;
}

.settings-toggle:hover,
.settings-toggle:focus-visible,
body:has(.settings-panel.is-open) .settings-toggle {
    opacity: 1;
    background: color-mix(in srgb, var(--muted) 40%, transparent);
    outline: none;
}

.settings-panel {
    position: fixed;
    top: 56px;
    left: 12px;
    width: min(280px, calc(100vw - 24px));
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    padding: 18px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(12px);
    border: 1px solid color-mix(in srgb, var(--muted) 70%, transparent);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    z-index: 999;
    transform: translateX(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
        opacity 0.22s ease,
        transform 0.22s ease,
        visibility 0.22s ease;
}

.settings-panel.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
}

.settings-heading {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 14px;
    color: var(--fg);
}

.preset-toolbar {
    margin-bottom: 16px;
}

.preset-chips {
    display: grid;
    grid-template-columns: repeat(6, 28px);
    gap: 10px;
    margin-bottom: 10px;
    justify-content: space-between;
}

.preset-chip {
    -webkit-appearance: none;
    appearance: none;
    box-sizing: border-box;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid color-mix(in srgb, var(--fg) 22%, transparent);
    outline: none;
    border-radius: 50%;
    cursor: pointer;
    background-color: transparent;
    background-origin: border-box;
    background-clip: border-box;
    transition:
        transform 0.15s ease,
        box-shadow 0.15s ease,
        border-color 0.15s ease;
}

.preset-chip:hover:not(:disabled),
.preset-chip:focus-visible:not(:disabled) {
    transform: scale(1.12);
    border-color: var(--fg);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--fg) 45%, transparent);
}

.preset-chip:active:not(:disabled) {
    transform: scale(0.96);
}

.preset-chip:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* Preset chip gradients are set inline by js/themes.js from the PRESETS config
   (bg + effect-color). The saved chip uses the user's last saved theme. */
.preset-chip--saved {
    background-image: linear-gradient(
        135deg,
        var(--saved-bg, color-mix(in srgb, var(--muted) 80%, var(--bg))) 50%,
        var(--saved-signature, color-mix(in srgb, var(--fg) 60%, var(--muted))) 50%
    );
}

.preset-hint {
    font-size: 0.72rem;
    line-height: 1.45;
    color: color-mix(in srgb, var(--fg) 68%, transparent);
    margin-bottom: 10px;
}

.save-theme-btn {
    width: 100%;
    padding: 9px 12px;
    border-radius: 10px;
    border: 1px dashed color-mix(in srgb, var(--muted) 70%, var(--fg));
    background: transparent;
    color: var(--fg);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition:
        border-color 0.15s ease,
        background-color 0.15s ease;
}

.save-theme-btn:hover {
    border-color: var(--fg);
    border-style: solid;
    background: color-mix(in srgb, var(--fg) 8%, transparent);
}

.save-theme-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--fg) 35%, transparent);
}

.settings-fields {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.color-field {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--fg);
}

.color-field-label {
    flex: 1;
    min-width: 0;
}

.color-field input[type="color"] {
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid color-mix(in srgb, var(--fg) 22%, transparent);
    border-radius: 50%;
    cursor: pointer;
    background: transparent;
    overflow: hidden;
    flex-shrink: 0;
    transition:
        transform 0.15s ease,
        box-shadow 0.15s ease,
        border-color 0.15s ease;
}

.color-field input[type="color"]:hover,
.color-field input[type="color"]:focus-visible {
    transform: scale(1.08);
    border-color: var(--fg);
    outline: none;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--fg) 40%, transparent);
}

.color-field input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
    border: none;
    border-radius: 50%;
}

.color-field input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}

.color-field input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: 50%;
}

.color-field select {
    flex: 1;
    max-width: 160px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--muted);
    font-size: 0.85rem;
    background: var(--bg);
    color: var(--fg);
    cursor: pointer;
}

.effect-row {
    align-items: center;
}

.reset-link {
    margin-top: 16px;
    width: 100%;
    padding: 10px;
    border: none;
    background: none;
    color: var(--link-on-bg);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.reset-link:hover {
    opacity: 0.85;
}

/* Timer toast */
.timer-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.96);
    padding: 18px 28px;
    border-radius: 14px;
    font-size: 1.35rem;
    font-weight: 500;
    text-align: center;
    background: color-mix(in srgb, var(--pause) 18%, var(--bg));
    color: var(--toast-fg);
    border: 1px solid color-mix(in srgb, var(--pause) 35%, transparent);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.28s ease,
        transform 0.28s ease,
        visibility 0.28s ease;
    pointer-events: none;
    max-width: min(90vw, 420px);
}

.timer-toast.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.clock-section {
    text-align: center;
    transition: all 0.3s;
}

.clock-section.hidden {
    display: none;
}

.clock-header {
    width: 100%;
    max-width: 800px;
    padding: 10px 0;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 3em;
    text-align: center;
    color: var(--fg);
    background: transparent;
    margin-bottom: 20px;
    outline: none;
    font-weight: 400;
    transition:
        border-color 0.2s,
        color 0.25s ease;
}

.clock-header:focus {
    border-bottom-color: var(--muted);
}

.clock-header::placeholder {
    color: var(--placeholder);
}

.clock {
    font-size: 14em;
    text-align: center;
    font-weight: 300;
    color: var(--fg);
    letter-spacing: 8px;
    transition: all 0.3s;
}

.clock.hidden {
    display: none;
}

.clock.small {
    position: fixed;
    top: 30px;
    right: 40px;
    font-size: 6em;
    letter-spacing: 2px;
    opacity: 0.7;
}

.toggle-timer {
    margin-top: 40px;
    padding: 16px 40px;
    background: none;
    border: 2px solid var(--fg);
    border-radius: 10px;
    color: var(--fg);
    font-size: 1.5em;
    cursor: pointer;
    transition:
        background-color 0.25s ease,
        color 0.25s ease,
        border-color 0.25s ease,
        opacity 0.3s;
    opacity: 0;
}

.clock-section:hover .toggle-timer {
    opacity: 1;
}

.toggle-timer:hover {
    background: var(--fg);
    color: var(--on-fg);
}

.toggle-timer.hidden {
    display: none;
}

.timer-section {
    max-width: 800px;
    width: 100%;
    display: none;
    text-align: center;
}

.timer-section.visible {
    display: block;
}

.timer-title-display {
    font-size: 3.5em;
    color: var(--fg);
    margin-bottom: 20px;
    font-weight: 400;
    transition: color 0.25s ease;
}

.timer-setup {
    margin-bottom: 30px;
}

.timer-setup.hidden {
    display: none;
}

.timer-title {
    width: 100%;
    padding: 20px 0;
    border: none;
    border-bottom: 3px solid var(--muted);
    font-size: 2.2em;
    text-align: center;
    color: var(--fg);
    background: transparent;
    margin-bottom: 30px;
    outline: none;
    transition: border-color 0.2s, color 0.25s ease;
}

.timer-title:focus {
    border-color: var(--fg);
}

.timer-title::placeholder {
    color: var(--placeholder);
}

.timer-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.timer-controls input {
    flex: 1;
    padding: 24px;
    border: 3px solid var(--muted);
    border-radius: 12px;
    font-size: 2em;
    text-align: center;
    color: var(--fg);
    outline: none;
    transition: border-color 0.2s, color 0.25s ease;
    background: var(--bg);
}

.timer-controls input:focus {
    border-color: var(--fg);
}

.timer-display {
    font-size: 16em;
    text-align: center;
    margin: 30px 0;
    color: var(--fg);
    font-weight: 300;
    letter-spacing: 8px;
    transition: color 0.25s ease;
}

.timer-running {
    display: none;
}

.timer-running.visible {
    display: block;
}

.button-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

.button-group.hover-show {
    opacity: 0;
    transition: opacity 0.3s;
}

.timer-running:hover .button-group.hover-show {
    opacity: 1;
}

button:not(.settings-toggle):not(.preset-chip):not(.reset-link):not(.save-theme-btn):not(.preset-chip--saved) {
    padding: 20px 48px;
    border: none;
    border-radius: 12px;
    font-size: 1.6em;
    cursor: pointer;
    font-weight: 500;
    transition:
        opacity 0.2s,
        background-color 0.25s ease,
        color 0.25s ease,
        border-color 0.25s ease;
}

.btn-start {
    background: var(--start);
    color: var(--on-start);
}

.btn-pause {
    background: var(--pause);
    color: var(--on-pause);
}

.btn-reset {
    background: var(--stop);
    color: var(--on-stop);
}

.btn-back {
    background: none !important;
    border: 2px solid var(--fg) !important;
    color: var(--fg) !important;
    margin-top: 30px;
}

.btn-back:hover {
    background: var(--fg) !important;
    color: var(--on-fg) !important;
}

button:not(.settings-toggle):not(.preset-chip):not(.reset-link):not(.save-theme-btn):not(.preset-chip--saved):hover {
    opacity: 0.85;
}