:root {
    --bg: #050505;
    --card: #111;
    --text: #fff;
    --text-dim: #666;
    --accent: #00ff9d;
    --accent-dim: rgba(0, 255, 157, 0.15);
    --glow: 0 0 20px rgba(0, 255, 157, 0.4);
    --modal-bg: #1a1a1a;
    --border: #333;
    --font-ui: 'Inter', sans-serif;
    --font-code: 'JetBrains Mono', monospace;
}

/* ─── Theme: Neon Blue ─── */
[data-theme="neon-blue"] {
    --accent: #00d4ff;
    --accent-dim: rgba(0, 212, 255, 0.15);
    --glow: 0 0 20px rgba(0, 212, 255, 0.4);
}

/* ─── Theme: Retro Orange ─── */
[data-theme="retro-orange"] {
    --accent: #ff6b2b;
    --accent-dim: rgba(255, 107, 43, 0.15);
    --glow: 0 0 20px rgba(255, 107, 43, 0.4);
}

/* ─── Theme: Minimal Light ─── */
[data-theme="minimal-light"] {
    --bg: #f5f5f5;
    --card: #fff;
    --text: #1a1a1a;
    --text-dim: #888;
    --accent: #2d2d2d;
    --accent-dim: rgba(45, 45, 45, 0.1);
    --glow: 0 0 15px rgba(0, 0, 0, 0.15);
    --modal-bg: #fff;
    --border: #ddd;
}

/* ─── Theme: Purple Haze ─── */
[data-theme="purple-haze"] {
    --accent: #bf5af2;
    --accent-dim: rgba(191, 90, 242, 0.15);
    --glow: 0 0 20px rgba(191, 90, 242, 0.4);
}

/* ─── Reset ─── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-ui);
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background 0.4s ease, color 0.4s ease;
}

/* ================================================================
   Header
   ================================================================ */
.top-bar {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 10;
}

.nav-actions {
    display: flex;
    gap: 4px;
}

.brand-logo {
    font-family: var(--font-code);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--accent);
    text-shadow: 0 0 10px currentColor;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    transition: transform 0.25s ease, color 0.25s ease, background 0.25s ease;
}

.icon-btn:hover {
    transform: rotate(60deg);
    color: var(--accent);
}

.icon-btn:active {
    transform: rotate(60deg) scale(0.9);
}

/* ================================================================
   Main Layout
   ================================================================ */
.timer-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 0 20px;
    gap: 0;
}

/* ================================================================
   Task Label Input
   ================================================================ */
.task-label-wrapper {
    margin-bottom: 1.5rem;
    width: 100%;
    max-width: 300px;
}

.task-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: var(--text);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    padding: 8px 4px;
    text-align: center;
    letter-spacing: 0.5px;
    transition: border-color 0.3s ease;
}

.task-input::placeholder {
    color: var(--text-dim);
    font-style: italic;
}

.task-input:focus {
    outline: none;
    border-bottom-color: var(--accent);
}

[data-theme="minimal-light"] .task-input {
    border-bottom-color: rgba(0,0,0,0.15);
}

/* ================================================================
   Timer Display + SVG Progress Ring
   ================================================================ */
.timer-wrapper {
    margin-bottom: 1.5rem;
    position: relative;
    width: 240px;
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 6px rgba(0, 255, 157, 0.25));
    transition: filter 0.4s ease;
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.4s ease, stroke 0.4s ease;
}

.time-ring {
    position: relative;
    z-index: 2;
    text-align: center;
}

.time-display {
    font-family: var(--font-code);
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    letter-spacing: -2px;
    text-shadow: 0 0 15px rgba(255,255,255,0.1);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.4s ease;
}

.status-label {
    text-align: center;
    color: var(--accent);
    font-family: var(--font-code);
    font-size: 0.7rem;
    letter-spacing: 3px;
    margin-top: 0.4rem;
    text-transform: uppercase;
    transition: opacity 0.3s ease, color 0.3s ease;
}

/* ================================================================
   Session Tracker Dots (Long Break Cycle)
   ================================================================ */
.session-tracker {
    display: flex;
    gap: 10px;
    margin-bottom: 1.5rem;
}

.session-tracker .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    transition: background 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease;
}

.session-tracker .dot.filled {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    transform: scale(1.15);
}

[data-theme="minimal-light"] .session-tracker .dot {
    background: rgba(0,0,0,0.1);
}

[data-theme="minimal-light"] .session-tracker .dot.filled {
    background: var(--accent);
    box-shadow: none;
}

/* ================================================================
   Responsive Breakpoints
   ================================================================ */
@media (min-width: 768px) {
    .timer-wrapper {
        width: 340px;
        height: 340px;
    }
    .time-display { font-size: 4.6rem; }
    .status-label { font-size: 0.85rem; }
    .task-label-wrapper { max-width: 360px; }
    .top-bar { padding: 1.5rem 2rem; }
}

@media (min-width: 1024px) {
    .timer-wrapper {
        width: 380px;
        height: 380px;
    }
    .time-display { font-size: 5.2rem; }
}

@media (max-width: 380px) {
    .timer-wrapper {
        width: 200px;
        height: 200px;
    }
    .time-display { font-size: 2.6rem; }
    .pill { padding: 10px 16px; font-size: 0.8rem; }
    .primary-btn { padding: 14px; font-size: 0.95rem; }
    .brand-logo { font-size: 1rem; }
    .task-input { font-size: 0.78rem; }
}

@media (max-height: 650px) {
    .task-label-wrapper { margin-bottom: 0.8rem; }
    .timer-wrapper { margin-bottom: 0.8rem; }
    .session-tracker { margin-bottom: 0.8rem; }
    .mode-pills { margin-bottom: 1.5rem; }
    .shortcut-hint { display: none; }
}

/* ================================================================
   Mode Switch Animation
   ================================================================ */
.mode-switching .time-display {
    animation: fadeScale 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mode-switching .progress-ring__circle {
    animation: ringPulse 0.5s ease;
}

.mode-switching .status-label {
    animation: fadeIn 0.35s ease;
}

@keyframes fadeScale {
    0%   { opacity: 0; transform: scale(0.8) translateY(8px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes ringPulse {
    0%   { filter: drop-shadow(0 0 6px rgba(0, 255, 157, 0.25)); }
    50%  { filter: drop-shadow(0 0 28px rgba(0, 255, 157, 0.7)); }
    100% { filter: drop-shadow(0 0 6px rgba(0, 255, 157, 0.25)); }
}

@keyframes fadeIn {
    0%   { opacity: 0; }
    100% { opacity: 1; }
}

/* ================================================================
   Completion Animation
   ================================================================ */
.completed .time-ring {
    animation: completePulse 0.6s ease;
}

.completed .progress-ring__circle {
    animation: ringGlow 1.2s ease infinite alternate;
}

.completed .status-label {
    animation: statusBlink 1.5s ease infinite;
}

@keyframes completePulse {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.08); }
    100% { transform: scale(1); }
}

@keyframes ringGlow {
    0%   { stroke: var(--accent); filter: drop-shadow(0 0 8px rgba(0, 255, 157, 0.3)); }
    100% { stroke: #66ffcc; filter: drop-shadow(0 0 35px rgba(0, 255, 157, 0.9)); }
}

@keyframes statusBlink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

/* ─── State transition: running glow ─── */
.running .progress-ring {
    filter: drop-shadow(0 0 12px var(--accent));
}

.running .time-display {
    text-shadow: 0 0 20px rgba(255,255,255,0.15);
}

/* ─── State transition: paused dim ─── */
.paused .progress-ring {
    filter: drop-shadow(0 0 3px rgba(255,255,255,0.1));
}

.paused .time-display {
    animation: pauseBlink 2s ease infinite;
}

@keyframes pauseBlink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

/* ================================================================
   Mode Selector Pills
   ================================================================ */
.mode-pills {
    display: flex;
    background: rgba(255,255,255,0.05);
    padding: 5px;
    border-radius: 50px;
    margin-bottom: 2rem;
    gap: 5px;
}

[data-theme="minimal-light"] .mode-pills {
    background: rgba(0,0,0,0.06);
}

.pill {
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 12px 24px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    position: relative;
    z-index: 1;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.pill:hover {
    color: var(--text);
}

.pill:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.pill.active {
    background: var(--accent-dim);
    color: var(--accent);
    box-shadow: 0 0 15px rgba(0,255,157,0.1);
    transform: scale(1.05);
}

/* ================================================================
   Control Buttons
   ================================================================ */
.controls {
    display: flex;
    gap: 15px;
    width: 100%;
    max-width: 400px;
}

.primary-btn {
    flex: 2;
    background: var(--accent);
    color: #000;
    border: none;
    padding: 18px;
    border-radius: 16px;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    font-family: var(--font-code);
    box-shadow: var(--glow);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.3s ease, background 0.3s ease;
}

[data-theme="minimal-light"] .primary-btn {
    color: #fff;
}

.primary-btn:hover {
    box-shadow: 0 0 35px rgba(0, 255, 157, 0.55);
}

.primary-btn:active {
    transform: scale(0.97);
}

.primary-btn:focus-visible {
    outline: 2px solid var(--text);
    outline-offset: 3px;
}

.secondary-btn {
    flex: 0.5;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.3s ease, transform 0.25s ease;
}

[data-theme="minimal-light"] .secondary-btn {
    border-color: rgba(0,0,0,0.2);
}

.secondary-btn:hover {
    border-color: var(--accent);
    transform: rotate(-45deg);
}

.secondary-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ================================================================
   Shortcut Hint Bar
   ================================================================ */
.shortcut-hint {
    margin-top: 2rem;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
    text-align: center;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.shortcut-hint span {
    display: inline-block;
    background: rgba(255,255,255,0.08);
    padding: 2px 7px;
    border-radius: 4px;
    font-family: var(--font-code);
    font-size: 0.65rem;
    margin: 0 2px;
}

[data-theme="minimal-light"] .shortcut-hint span {
    background: rgba(0,0,0,0.07);
}

/* ================================================================
   Settings Modal
   ================================================================ */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--modal-bg);
    width: 100%;
    max-width: 500px;
    border-radius: 24px 24px 0 0;
    padding: 2rem;
    border-top: 1px solid var(--border);
    animation: slideUp 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    max-height: 85vh;
    overflow-y: auto;
}

@media (min-width: 768px) {
    .modal { align-items: center; }
    .modal-content { border-radius: 24px; border-top: none; border: 1px solid var(--border); }
}

@keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    color: var(--text);
}

.modal-header h2 {
    font-family: var(--font-code);
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    padding: 5px;
    cursor: pointer;
    transition: transform 0.25s ease, color 0.25s ease;
}

.close-btn:hover {
    transform: rotate(90deg);
    color: var(--accent);
}

.close-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.setting-group {
    margin-bottom: 1.5rem;
}

.setting-group label {
    display: block;
    color: var(--text-dim);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.setting-group input,
.setting-group select {
    width: 100%;
    padding: 12px;
    background: #000;
    border: 1px solid var(--border);
    color: var(--accent);
    border-radius: 8px;
    font-family: var(--font-code);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="minimal-light"] .setting-group input,
[data-theme="minimal-light"] .setting-group select {
    background: #f0f0f0;
    color: #1a1a1a;
}

.setting-group input:focus,
.setting-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(0, 255, 157, 0.2);
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.setting-row label {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.full-btn {
    width: 100%;
    padding: 16px;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-family: var(--font-ui);
    cursor: pointer;
    transition: background 0.3s ease, color 0.3s ease, transform 0.1s ease;
}

[data-theme="minimal-light"] .full-btn {
    background: #e0e0e0;
    color: #1a1a1a;
}

.full-btn:hover {
    background: var(--accent);
    color: #000;
}

.full-btn:active {
    transform: scale(0.98);
}

.full-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}