/* Theme Variables */
:root {
    --font-primary: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

/* Dark Theme (Default) */
body.dark-theme {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #5a5a5a;
    --text-dim: #3a3a3a;
    --accent: #6a6a6a;
    --border: #2a2a2a;
    --gradient-start: #ffffff;
    --gradient-end: #808080;
    --shadow: rgba(0, 0, 0, 0.5);
    --glow: rgba(255, 255, 255, 0.1);
}

/* Light Theme */
body.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #0a0a0a;
    --text-secondary: #2a2a2a;
    --text-muted: #4a4a4a;
    --text-dim: #6a6a6a;
    --accent: #3a3a3a;
    --border: #c0c0c0;
    --gradient-start: #0a0a0a;
    --gradient-end: #5a5a5a;
    --shadow: rgba(0, 0, 0, 0.15);
    --glow: rgba(0, 0, 0, 0.1);
}

/* Midnight Blue Theme */
body.midnight-theme {
    --bg-primary: #0a0f1c;
    --bg-secondary: #141b2d;
    --bg-tertiary: #1a2332;
    --text-primary: #e8f4fd;
    --text-secondary: #b8d4e8;
    --text-muted: #5a7a9a;
    --text-dim: #3a5570;
    --accent: #4a8bc2;
    --border: #2a3f5f;
    --gradient-start: #a8d8ff;
    --gradient-end: #4a8bc2;
    --shadow: rgba(10, 15, 28, 0.5);
    --glow: rgba(74, 139, 194, 0.2);
}

/* Charcoal Theme */
body.charcoal-theme {
    --bg-primary: #1c1c1c;
    --bg-secondary: #252525;
    --bg-tertiary: #2e2e2e;
    --text-primary: #f0f0f0;
    --text-secondary: #d0d0d0;
    --text-muted: #707070;
    --text-dim: #505050;
    --accent: #808080;
    --border: #3a3a3a;
    --gradient-start: #e0e0e0;
    --gradient-end: #909090;
    --shadow: rgba(0, 0, 0, 0.6);
    --glow: rgba(240, 240, 240, 0.08);
}

/* Slate Gray Theme */
body.slate-theme {
    --bg-primary: #2c3e50;
    --bg-secondary: #34495e;
    --bg-tertiary: #3c5066;
    --text-primary: #ecf0f1;
    --text-secondary: #bdc3c7;
    --text-muted: #7f8c8d;
    --text-dim: #5d6d7e;
    --accent: #95a5a6;
    --border: #4a5f7a;
    --gradient-start: #ecf0f1;
    --gradient-end: #95a5a6;
    --shadow: rgba(44, 62, 80, 0.5);
    --glow: rgba(236, 240, 241, 0.1);
}

/* Font Families */
body.font-sf-mono {
    --font-primary: 'SF Mono', monospace;
}

body.font-fira-code {
    --font-primary: 'Fira Code', monospace;
}

body.font-jetbrains {
    --font-primary: 'JetBrains Mono', monospace;
}

body.font-cascadia {
    --font-primary: 'Cascadia Code', monospace;
}

body.font-roboto {
    --font-primary: 'Roboto Mono', monospace;
}

/* Apply theme variables */
body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-primary);
}

body::before {
    background: radial-gradient(circle at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

/* Settings Panel Styles */
.settings-panel {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.settings-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0;
    margin: 0;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px var(--shadow);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    line-height: 0;
}

.settings-toggle svg {
    width: 24px;
    height: 24px;
    display: block;
    margin: 0;
    padding: 0;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center center;
    position: relative;
    z-index: 1;
}

.settings-toggle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--glow);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
    z-index: -1;
}

.settings-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    transform: scale(1.05);
    box-shadow: 0 4px 16px var(--shadow), 0 0 20px var(--glow);
}

.settings-toggle:hover svg {
    transform: rotate(90deg) translateZ(0);
}

.settings-toggle:active {
    transform: scale(0.98);
}

.settings-toggle:hover::before {
    width: 100%;
    height: 100%;
}

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

.settings-toggle:focus:not(:focus-visible) {
    outline: none;
}

.settings-content {
    position: absolute;
    top: 60px;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    min-width: 250px;
    max-height: 500px;
    overflow-y: auto;
    display: none;
    box-shadow: 0 10px 40px var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transform-origin: top right;
    will-change: transform, opacity;
}

.settings-panel.active .settings-content {
    display: block;
    animation: slideIn 0.3s ease;
    transform: scale(1);
    opacity: 1;
}

.settings-panel.active .settings-toggle {
    transform: scale(1);
}

.settings-panel.active .settings-toggle:hover {
    transform: scale(1.05);
}

.settings-content h3 {
    margin: 0 0 20px 0;
    color: var(--text-primary);
    font-size: 16px;
    letter-spacing: 2px;
}

.setting-group {
    margin-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting-group label {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 1px;
}

.setting-group select,
.setting-group input[type="checkbox"] {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.setting-group select:hover {
    background: var(--bg-primary);
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow);
}

.setting-group select:focus,
.setting-group input[type="checkbox"]:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.setting-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
}

/* Quarterly Progress Styles */
.quarterly-progress {
    margin-top: 40px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: none;
}

.quarterly-progress.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.quarterly-progress h3 {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-align: center;
}

.quarters-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.quarter {
    text-align: center;
}

.quarter-label {
    color: var(--text-dim);
    font-size: 11px;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 8px;
}

.quarter-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 8px;
}

.quarter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--text-muted) 100%);
    border-radius: 2px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.quarter-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: quarterShine 2s ease-in-out infinite;
}

@keyframes quarterShine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.quarter-percent {
    color: var(--text-muted);
    font-size: 10px;
}

/* Time Scales */
.time-scales {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 30px;
    display: none;
}

.time-scales.active {
    display: flex;
    animation: fadeIn 0.5s ease;
}

.scale-item {
    text-align: center;
    min-width: 120px;
}

.scale-label {
    color: var(--text-dim);
    font-size: 10px;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 5px;
}

.scale-value {
    color: var(--text-secondary);
    font-size: 18px;
    font-weight: 300;
    display: block;
    margin-bottom: 10px;
}

.scale-progress {
    width: 100%;
    height: 2px;
    background: var(--bg-tertiary);
    border-radius: 1px;
    overflow: hidden;
}

.scale-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--text-muted) 100%);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.scale-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    animation: scaleShine 2.5s ease-in-out infinite;
}

@keyframes scaleShine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Circular Progress */
.circular-progress-container {
    margin: 40px auto;
    text-align: center;
}

.circular-progress {
    transform: rotate(-90deg);
}

.circle-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.circle-progress {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 0 4px var(--glow));
    animation: circlePulse 3s ease-in-out infinite;
}

@keyframes circlePulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.9;
    }
}

.circle-text {
    fill: var(--text-primary);
    font-size: 32px;
    font-weight: 200;
    text-anchor: middle;
    dominant-baseline: middle;
    transform: rotate(90deg);
    transform-origin: center;
    transition: fill 0.3s ease;
    filter: drop-shadow(0 0 2px var(--glow));
}

/* Holiday Countdowns */
.holiday-countdowns {
    margin-top: 40px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: none;
}

.holiday-countdowns.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.holiday-countdowns h3 {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-align: center;
}

.holidays-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.holiday-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.holiday-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.holiday-item:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
    border-color: var(--border);
    box-shadow: 0 2px 8px var(--shadow);
}

.holiday-item:hover::before {
    transform: scaleY(1);
}

.holiday-name {
    color: var(--text-secondary);
    font-size: 12px;
    letter-spacing: 1px;
}

.holiday-countdown {
    color: var(--text-muted);
    font-size: 11px;
}

/* Quote Container */
.quote-container {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    opacity: 0;
    animation: fadeIn 2s ease 1s forwards;
    position: relative;
}

.quote-container::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 60px;
    color: var(--text-dim);
    opacity: 0.2;
    font-family: serif;
    line-height: 1;
}

#dailyQuote {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
    font-style: italic;
    margin: 0;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 1;
    transition: color 0.3s ease;
}

.quote-container:hover #dailyQuote {
    color: var(--text-secondary);
}

#quoteAuthor {
    color: var(--text-dim);
    font-size: 11px;
    margin-top: 10px;
    display: block;
    letter-spacing: 2px;
}

/* Heatmap Calendar */
.heatmap-calendar {
    margin-top: 40px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.heatmap-calendar h3 {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-align: center;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(53, 1fr);
    grid-template-rows: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 20px;
}

.heatmap-cell {
    aspect-ratio: 1;
    border-radius: 2px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.heatmap-cell[data-level="0"] { background: var(--bg-tertiary); }
.heatmap-cell[data-level="1"] { background: var(--text-dim); opacity: 0.3; }
.heatmap-cell[data-level="2"] { background: var(--text-dim); opacity: 0.5; }
.heatmap-cell[data-level="3"] { background: var(--text-dim); opacity: 0.7; }
.heatmap-cell[data-level="4"] { background: var(--text-muted); }
.heatmap-cell.future { opacity: 0.3; }

.heatmap-cell:hover {
    transform: scale(1.5);
    border: 1px solid var(--accent);
    z-index: 10;
    box-shadow: 0 0 10px var(--glow);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.heatmap-legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 10px;
    color: var(--text-dim);
}

.legend-blocks {
    display: flex;
    gap: 3px;
}

.legend-block {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.legend-block[data-level="0"] { background: var(--bg-tertiary); }
.legend-block[data-level="1"] { background: var(--text-dim); opacity: 0.3; }
.legend-block[data-level="2"] { background: var(--text-dim); opacity: 0.5; }
.legend-block[data-level="3"] { background: var(--text-dim); opacity: 0.7; }
.legend-block[data-level="4"] { background: var(--text-muted); }

/* Milestone Notification */
.milestone-notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-secondary);
    border: 2px solid var(--accent);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    z-index: 2000;
    animation: bounceIn 0.5s ease;
}

.milestone-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 15px;
}

.milestone-text {
    color: var(--text-primary);
    font-size: 18px;
    letter-spacing: 2px;
}

/* Particle Canvas */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    display: none;
}

/* Smooth transitions for all interactive elements */
button, select, input, a {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Enhanced focus states */
button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

/* Smooth scrollbar */
.settings-content::-webkit-scrollbar {
    width: 6px;
}

.settings-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.settings-content::-webkit-scrollbar-thumb {
    background: var(--text-dim);
    border-radius: 3px;
    transition: background 0.3s ease;
}

.settings-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.3);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Update existing styles with theme variables */
.big-number .number {
    color: var(--text-primary);
    text-shadow: 0 0 40px var(--glow);
    font-weight: 100;
}

.big-number .label {
    color: var(--text-muted);
}

.time-unit .value {
    color: var(--text-secondary);
}

.time-unit .unit-label {
    color: var(--text-dim);
}

.separator {
    color: var(--border);
}

.progress-bar-container {
    background: var(--bg-tertiary);
    box-shadow: inset 0 0 10px var(--shadow);
}

.progress-bar {
    background: linear-gradient(90deg, var(--border) 0%, var(--accent) 50%, var(--border) 100%);
    box-shadow: 0 0 20px var(--glow);
}

.progress-text {
    color: var(--text-dim);
}

.progress-text span {
    color: var(--text-muted);
}

.current-time {
    color: var(--border);
}

.year-label {
    color: var(--text-dim);
}

/* Light Theme Specific Overrides */
body.light-theme .big-number .number {
    color: #0a0a0a !important;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

body.light-theme .big-number .label {
    color: #4a4a4a;
}

body.light-theme .time-unit .value {
    color: #2a2a2a;
}

body.light-theme .time-unit .unit-label {
    color: #6a6a6a;
}

body.light-theme .separator {
    color: #8a8a8a;
}

body.light-theme .progress-text {
    color: #6a6a6a;
}

body.light-theme .progress-text span {
    color: #4a4a4a;
}

body.light-theme .current-time {
    color: #8a8a8a;
}

body.light-theme .year-label {
    color: #6a6a6a;
}

body.light-theme .quarter-label {
    color: #6a6a6a;
}

body.light-theme .quarter-percent {
    color: #4a4a4a;
}

body.light-theme .scale-label {
    color: #6a6a6a;
}

body.light-theme .scale-value {
    color: #2a2a2a;
}

body.light-theme .holiday-name {
    color: #2a2a2a;
}

body.light-theme .holiday-countdown {
    color: #6a6a6a;
}

body.light-theme #dailyQuote {
    color: #4a4a4a;
}

body.light-theme #quoteAuthor {
    color: #6a6a6a;
}