/**
 * MetriCal Stylesheet
 * 
 * A decimal time display with progress bars.
 * Supports light and dark themes.
 * 
 * CSS Variables define the color scheme for easy theming.
 */

/* ============================================
   CSS Custom Properties (Theme Variables)
   ============================================ */

:root {
    /* Dark theme (default) */
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-primary: #00d4ff;
    --accent-secondary: #ff6b35;
    --border-color: #2d3748;
    --box-empty: #2d3748;
    --box-filled: #00d4ff;
    --box-border: #4a5568;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Font sizes */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-md: 1rem;
    --font-lg: 1.25rem;
    --font-xl: 2rem;
    --font-xxl: 3rem;
    
    /* Box sizes for progress bars */
    --box-size: 18px;
    --box-gap: 2px;
}

/* Light theme */
[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8e8;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-primary: #0984e3;
    --accent-secondary: #00b894;
    --border-color: #dfe6e9;
    --box-empty: #dfe6e9;
    --box-filled: #00b894;
    --box-border: #b2bec3;
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
    font-size: 16px;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   Container
   ============================================ */

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   Header / Controls
   ============================================ */

.controls {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.controls-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.controls-right {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.control-group label {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.control-group select {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    min-width: 150px;
}

.control-group select:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Select with info button */
.select-with-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.info-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.info-btn:hover {
    background-color: var(--accent-primary);
    transform: scale(1.1);
}

/* Select with about button */
.select-with-about {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-grow: 1;
}

/* About button */
.about-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
    margin-left: auto;
}

.about-btn:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

.info-icon {
    font-size: var(--font-md);
    color: var(--text-secondary);
    line-height: 1;
}

.info-btn:hover .info-icon {
    color: var(--bg-primary);
}

/* Info Box */
.info-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.info-box.hidden {
    display: none;
}

.info-box-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.info-box-title {
    font-size: var(--font-md);
    font-weight: 700;
    color: var(--accent-primary);
}

.info-box-close {
    background: none;
    border: none;
    font-size: var(--font-lg);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.info-box-close:hover {
    color: var(--accent-secondary);
}

.info-box-content {
    font-size: var(--font-sm);
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.info-box-link {
    font-size: var(--font-sm);
    color: var(--accent-primary);
    text-decoration: none;
}

.info-box-link:hover {
    text-decoration: underline;
}

/* Converter Box */
.converter-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--accent-secondary);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.converter-box.hidden {
    display: none;
}

.converter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.converter-title {
    font-size: var(--font-md);
    font-weight: 700;
    color: var(--accent-secondary);
}

.converter-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.converter-input-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.converter-input-group label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
}

/* Timezone Toggle */
.timezone-toggle {
    display: flex;
    gap: 2px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    padding: 2px;
}

.tz-toggle-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.tz-toggle-btn:hover {
    color: var(--text-primary);
}

.tz-toggle-btn.active {
    background-color: var(--accent-secondary);
    color: var(--bg-primary);
}

.converter-input {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    max-width: 280px;
}

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

/* Webkit date input styling */
.converter-input::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
    cursor: pointer;
}

[data-theme="light"] .converter-input::-webkit-calendar-picker-indicator {
    filter: none;
}

.converter-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.converter-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    font-size: var(--font-sm);
}

.converter-result-label {
    color: var(--text-secondary);
    min-width: 80px;
}

.converter-result-value {
    color: var(--accent-primary);
    font-weight: 500;
    text-align: right;
}

.theme-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: var(--font-lg);
    transition: transform 0.2s ease;
}

.theme-btn:hover {
    transform: scale(1.1);
}

/* Day view toggle button */
.view-toggle-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: var(--font-lg);
    transition: transform 0.2s ease, background-color 0.2s ease;
    color: var(--text-primary);
}

.view-toggle-btn:hover {
    transform: scale(1.1);
}

.view-toggle-btn.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* CSS-based grid icon for consistent display */
.view-icon-grid {
    display: inline-block;
    width: 14px;
    height: 14px;
    position: relative;
    vertical-align: middle;
}

.view-icon-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 5px;
    background-color: var(--text-primary);
    border-radius: 1px;
    box-shadow: 
        8px 0 0 var(--text-primary),
        0 8px 0 var(--text-primary),
        8px 8px 0 var(--text-primary);
}

/* Show/hide sun/moon icons based on theme */
.icon-sun {
    display: none;
}

.icon-moon {
    display: inline;
}

[data-theme="light"] .icon-sun {
    display: inline;
}

[data-theme="light"] .icon-moon {
    display: none;
}

/* ============================================
   Main Display
   ============================================ */

.display {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

/* Date and Time sections */
.datetime-section {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.timezone-section {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.info-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-size: var(--font-xs);
    color: var(--text-secondary);
    text-align: center;
}

.display-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    align-self: flex-start;
}

.label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.label-abbrev {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    opacity: 0.7;
}

.total-days {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.value {
    font-size: var(--font-xl);
    color: var(--accent-primary);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.value.large {
    font-size: var(--font-xxl);
}

.separator {
    font-size: var(--font-xl);
    color: var(--text-secondary);
    align-self: flex-end;
    padding-bottom: var(--spacing-md);
}

/* Time section specific */
.time-section {
    flex-direction: column;
}

.time-block {
    margin-bottom: var(--spacing-sm);
}

.timezone-display {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    font-size: var(--font-md);
    color: var(--text-secondary);
}

#tz-offset {
    color: var(--accent-secondary);
    font-weight: 600;
}

/* ============================================
   Progress Bars Section
   ============================================ */

.progress-section {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.progress-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.progress-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.progress-block.wide {
    min-width: 200px;
}

/* Day view containers */
.day-view-standard,
.day-view-digits {
    display: flex;
    gap: var(--spacing-lg);
}

.day-view-digits.hidden,
.day-view-standard.hidden {
    display: none;
}

/* Sub-interval container with divider */
.sub-container {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.sub-divider {
    width: 2px;
    height: calc(10 * var(--box-size) + 9 * var(--box-gap) + var(--box-gap) * 2);
    background-color: var(--border-color);
    margin: 0 var(--spacing-xs);
}

.progress-label {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Vertical progress bar (10 boxes) */
.progress-bar.vertical {
    display: flex;
    flex-direction: column;
    gap: var(--box-gap);
}

/* Add gap after 5th box in vertical bars */
.progress-bar.vertical .progress-box:nth-child(5) {
    margin-bottom: calc(var(--box-gap) * 2);
}

/* Short vertical progress bar (3 boxes for hundreds digit) */
.progress-bar.vertical.short {
    display: flex;
    flex-direction: column;
    gap: var(--box-gap);
}

/* No gap for short bars (only 3 boxes) */
.progress-bar.vertical.short .progress-box:nth-child(5) {
    margin-bottom: 0;
}

.progress-bar.vertical.short .progress-box:nth-child(2) {
    margin-bottom: 0;
}

/* Grid progress bar (10x10) with 5er gaps */
.progress-bar.grid {
    display: grid;
    grid-template-columns: 
        repeat(5, var(--box-size)) 
        calc(var(--box-gap) * 2) 
        repeat(5, var(--box-size));
    grid-template-rows: 
        repeat(5, var(--box-size)) 
        calc(var(--box-gap) * 2) 
        repeat(5, var(--box-size));
    gap: var(--box-gap);
}

/* Grid boxes skip the gap columns/rows */
.progress-bar.grid .progress-box {
    /* Boxes 1-5 in columns 1-5, boxes 6-10 in columns 7-11 */
}

.progress-bar.grid .progress-box:nth-child(10n+1) { grid-column: 1; }
.progress-bar.grid .progress-box:nth-child(10n+2) { grid-column: 2; }
.progress-bar.grid .progress-box:nth-child(10n+3) { grid-column: 3; }
.progress-bar.grid .progress-box:nth-child(10n+4) { grid-column: 4; }
.progress-bar.grid .progress-box:nth-child(10n+5) { grid-column: 5; }
.progress-bar.grid .progress-box:nth-child(10n+6) { grid-column: 7; }
.progress-bar.grid .progress-box:nth-child(10n+7) { grid-column: 8; }
.progress-bar.grid .progress-box:nth-child(10n+8) { grid-column: 9; }
.progress-bar.grid .progress-box:nth-child(10n+9) { grid-column: 10; }
.progress-bar.grid .progress-box:nth-child(10n) { grid-column: 11; }

/* Rows 1-5 use rows 1-5, rows 6-10 use rows 7-11 */
.progress-bar.grid .progress-box:nth-child(-n+10) { grid-row: 1; }
.progress-bar.grid .progress-box:nth-child(n+11):nth-child(-n+20) { grid-row: 2; }
.progress-bar.grid .progress-box:nth-child(n+21):nth-child(-n+30) { grid-row: 3; }
.progress-bar.grid .progress-box:nth-child(n+31):nth-child(-n+40) { grid-row: 4; }
.progress-bar.grid .progress-box:nth-child(n+41):nth-child(-n+50) { grid-row: 5; }
.progress-bar.grid .progress-box:nth-child(n+51):nth-child(-n+60) { grid-row: 7; }
.progress-bar.grid .progress-box:nth-child(n+61):nth-child(-n+70) { grid-row: 8; }
.progress-bar.grid .progress-box:nth-child(n+71):nth-child(-n+80) { grid-row: 9; }
.progress-bar.grid .progress-box:nth-child(n+81):nth-child(-n+90) { grid-row: 10; }
.progress-bar.grid .progress-box:nth-child(n+91) { grid-row: 11; }

/* Year grid progress bar (36 boxes: 5x5 + 2x5 + 1) with 5er gap */
.progress-bar.year-grid {
    display: grid;
    grid-template-columns: repeat(5, var(--box-size));
    grid-template-rows: 
        repeat(5, var(--box-size)) 
        calc(var(--box-gap) * 2) 
        repeat(3, var(--box-size));
    gap: var(--box-gap);
}

/* Year grid boxes row placement */
.progress-bar.year-grid .progress-box:nth-child(-n+5) { grid-row: 1; }
.progress-bar.year-grid .progress-box:nth-child(n+6):nth-child(-n+10) { grid-row: 2; }
.progress-bar.year-grid .progress-box:nth-child(n+11):nth-child(-n+15) { grid-row: 3; }
.progress-bar.year-grid .progress-box:nth-child(n+16):nth-child(-n+20) { grid-row: 4; }
.progress-bar.year-grid .progress-box:nth-child(n+21):nth-child(-n+25) { grid-row: 5; }
.progress-bar.year-grid .progress-box:nth-child(n+26):nth-child(-n+30) { grid-row: 7; }
.progress-bar.year-grid .progress-box:nth-child(n+31):nth-child(-n+35) { grid-row: 8; }
.progress-bar.year-grid .progress-box:nth-child(n+36) { grid-row: 9; }

/* Hide boxes 37-40 (last column only has 6 boxes) */
.progress-bar.year-grid .progress-box.hidden {
    visibility: hidden;
}

/* Individual box styling */
.progress-box {
    width: var(--box-size);
    height: var(--box-size);
    background-color: var(--box-empty);
    border: 1px solid var(--box-border);
    border-radius: 2px;
    transition: background-color 0.1s ease;
}

.progress-box.filled {
    background-color: var(--box-filled);
    border-color: var(--box-filled);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    text-align: center;
    padding: var(--spacing-md);
    font-size: var(--font-xs);
    color: var(--text-secondary);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    :root {
        --box-size: 14px;
        --font-xl: 1.5rem;
        --font-xxl: 2rem;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .theme-btn {
        margin-left: 0;
        align-self: flex-end;
    }
    
    .progress-container {
        flex-direction: column;
        align-items: center;
    }
    
    .date-section {
        flex-direction: column;
    }
    
    .separator {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        --box-size: 12px;
    }
    
    .container {
        padding: var(--spacing-sm);
    }
}