:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --accent-work: #f97316;
    --accent-work-glow: rgba(249, 115, 22, 0.3);
    --accent-project: #06b6d4;
    --accent-project-glow: rgba(6, 182, 212, 0.3);
    --accent-study: #a855f7;
    --accent-study-glow: rgba(168, 85, 247, 0.3);
    --accent-total: #22c55e;
    --accent-total-glow: rgba(34, 197, 94, 0.3);
    
    --border-color: #30363d;
    --border-highlight: #484f58;
    
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --shadow-glow: 0 0 40px rgba(168, 85, 247, 0.1), 0 0 80px rgba(6, 182, 212, 0.05);
}

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

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    background-image: 
        radial-gradient(ellipse at 20% 0%, rgba(168, 85, 247, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(249, 115, 22, 0.03) 0%, transparent 70%);
    background-attachment: fixed;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 1rem;
    padding: 1rem 0;
    position: relative;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--accent-project), var(--accent-study));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    text-align: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

/* Auth Section */
.auth-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-project);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--accent-project);
    background: var(--bg-tertiary);
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.sign-out-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s ease;
}

.sign-out-btn:hover {
    color: var(--accent-work);
}

/* Auth Container */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-glow);
    animation: fadeIn 0.5s ease-out;
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.auth-tab {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.auth-tab.active {
    background: linear-gradient(135deg, var(--accent-project), var(--accent-study));
    border-color: transparent;
    color: white;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-group input {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-project);
    box-shadow: 0 0 0 3px var(--accent-project-glow);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-error {
    color: var(--accent-work);
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.submit-btn {
    padding: 0.875rem;
    background: linear-gradient(135deg, var(--accent-project), var(--accent-study));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

#googleButtonContainer {
    display: flex;
    justify-content: center;
}

.auth-features {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-features .feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Verification Banner */
.verification-banner {
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--accent-work);
}

.verification-banner button {
    background: var(--accent-work);
    border: none;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.75rem;
    cursor: pointer;
    transition: opacity 0.2s;
}

.verification-banner button:hover {
    opacity: 0.8;
}

/* Sync Status */
.sync-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--accent-total);
    transition: all 0.3s ease;
}

.sync-status.syncing {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--accent-project);
}

.sync-status.error {
    background: rgba(249, 115, 22, 0.1);
    border-color: rgba(249, 115, 22, 0.3);
    color: var(--accent-work);
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
    position: relative;
}

/* View Toggle */
.view-toggle {
    position: absolute;
    right: 0;
    display: flex;
    gap: 4px;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.view-btn {
    width: 36px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--accent-project);
    color: white;
}

.week-navigation {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.week-navigation.centered {
    justify-content: center;
}

.week-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    min-width: 180px;
}

.nav-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-highlight);
}

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

.current-week {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    text-align: center;
}

.week-dates {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    color: var(--text-primary);
    min-width: 120px;
    text-align: center;
}

.add-week-btn {
    background: linear-gradient(135deg, var(--accent-project), var(--accent-study));
    border: none;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.add-week-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

/* Spreadsheet */
/* TABLE: Minimal with subtle border */
.spreadsheet-container {
    background: transparent;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    margin-bottom: 1.5rem;
    box-shadow: none;
    padding: 0.5rem 0;
}

/* Calendar View */
.calendar-view {
    display: none;
}

.spreadsheet-container.calendar-mode .spreadsheet {
    display: none;
}

.spreadsheet-container.calendar-mode .calendar-view {
    display: block;
}

/* Month Calendar Header */
.calendar-month-header {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.calendar-weekday-headers {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
}

.calendar-weekday {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem;
}

.calendar-month-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    padding: 0.5rem 1rem 1rem;
}

.calendar-day {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    min-height: 80px;
    transition: border-color 0.2s, background 0.2s;
}

.calendar-day:hover {
    border-color: var(--border-highlight);
    background: rgba(255, 255, 255, 0.02);
}

.calendar-day.other-month {
    opacity: 0.4;
    background: transparent;
}

.calendar-day.current-week {
    border-color: var(--accent-project);
    background: rgba(6, 182, 212, 0.05);
}

.calendar-day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.calendar-day-date {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.calendar-day.current-week .calendar-day-date {
    color: var(--accent-project);
}

.calendar-day-total {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-total);
}

.calendar-entries {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.calendar-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 3px;
    border-left: 2px solid var(--cat-color, var(--border-color));
}

.calendar-entry-icon {
    font-size: 0.75rem;
}

.calendar-entry-value {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--cat-color, var(--text-primary));
    cursor: pointer;
    min-width: 24px;
    text-align: right;
}

.calendar-entry-value:hover {
    opacity: 0.7;
}

.calendar-entry.empty {
    opacity: 0.3;
}

.calendar-entry.empty:hover {
    opacity: 0.6;
}

.calendar-edit-input {
    width: 36px;
    background: var(--bg-tertiary);
    border: 1px solid var(--cat-color, var(--accent-project));
    border-radius: 3px;
    color: var(--cat-color, var(--text-primary));
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    text-align: center;
    padding: 1px 2px;
    outline: none;
}

.calendar-edit-input::-webkit-outer-spin-button,
.calendar-edit-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.calendar-edit-input {
    -moz-appearance: textfield;
}

.spreadsheet {
    overflow-x: auto;
}

.spreadsheet table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.spreadsheet th,
.spreadsheet td {
    padding: 0.875rem 1rem;
    text-align: center;
    border: none;
}

.spreadsheet th {
    background: transparent;
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--text-muted);
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.spreadsheet th:first-child {
    text-align: left;
    padding-left: 1.5rem;
}

.spreadsheet tbody td {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.spreadsheet tbody tr:last-child td {
    border-bottom: none;
}

.spreadsheet td:first-child {
    text-align: left;
    padding-left: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spreadsheet tbody tr {
    transition: background 0.15s;
}

.spreadsheet tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.spreadsheet tbody tr:hover td:first-child {
    color: var(--text-primary);
}

.spreadsheet input {
    width: 70px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-align: center;
    transition: all 0.2s ease;
}

.spreadsheet input:focus {
    outline: none;
    border-color: var(--accent-project);
    box-shadow: 0 0 0 3px var(--accent-project-glow);
}

.spreadsheet input.work-input:focus {
    border-color: var(--accent-work);
    box-shadow: 0 0 0 3px var(--accent-work-glow);
}

.spreadsheet input.project-input:focus {
    border-color: var(--accent-project);
    box-shadow: 0 0 0 3px var(--accent-project-glow);
}

.spreadsheet input.study-input:focus {
    border-color: var(--accent-study);
    box-shadow: 0 0 0 3px var(--accent-study-glow);
}

.day-total {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent-total);
}

/* Column Headers with Colors */
.col-work { color: var(--accent-work) !important; }
.col-project { color: var(--accent-project) !important; }
.col-study { color: var(--accent-study) !important; }
.col-total { color: var(--accent-total) !important; }

/* Summary Section */
.summary-section {
    margin-bottom: 2rem;
}

.weekly-summary h3,
.chart-section h3,
.all-weeks-chart h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.summary-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.summary-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
}

.summary-card.work { border-top: 3px solid var(--accent-work); }
.summary-card.project { border-top: 3px solid var(--accent-project); }
.summary-card.study { border-top: 3px solid var(--accent-study); }
.summary-card.total { border-top: 3px solid var(--accent-total); }

.card-icon { font-size: 2rem; }

.card-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
}

.summary-card.work .card-value { color: var(--accent-work); }
.summary-card.project .card-value { color: var(--accent-project); }
.summary-card.study .card-value { color: var(--accent-study); }
.summary-card.total .card-value { color: var(--accent-total); }

/* Chart Section */
.chart-section,
.all-weeks-chart {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.chart-container {
    position: relative;
    height: 300px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container { padding: 1rem; }
    .header-top { flex-direction: column; gap: 1rem; }
    .header h1 { font-size: 1.75rem; }
    .controls { flex-direction: column; align-items: center; }
    .week-navigation { justify-content: center; }
    .week-info { min-width: 140px; }
    .summary-cards { grid-template-columns: repeat(2, 1fr); }
    .spreadsheet input { width: 50px; padding: 0.375rem; font-size: 0.8rem; }
    .spreadsheet th, .spreadsheet td { padding: 0.75rem 0.5rem; }
    .auth-card { padding: 1.5rem; margin: 1rem; }
    .auth-features { flex-direction: column; gap: 0.5rem; }
}

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

.spreadsheet-container, .summary-section, .chart-section, .all-weeks-chart {
    animation: fadeIn 0.5s ease-out;
}

.summary-card {
    animation: fadeIn 0.5s ease-out;
    animation-fill-mode: both;
}

.summary-card:nth-child(1) { animation-delay: 0.1s; }
.summary-card:nth-child(2) { animation-delay: 0.2s; }
.summary-card:nth-child(3) { animation-delay: 0.3s; }
.summary-card:nth-child(4) { animation-delay: 0.4s; }
.summary-card:nth-child(5) { animation-delay: 0.5s; }
.summary-card:nth-child(6) { animation-delay: 0.6s; }
.summary-card:nth-child(7) { animation-delay: 0.7s; }
.summary-card:nth-child(8) { animation-delay: 0.8s; }

/* Dynamic category colors */
.col-category {
    color: var(--cat-color, var(--text-primary));
}

/* Hour input group with +/- buttons - OPTION 1: Minimalist Inline */
.hour-input-group {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.hour-btn {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hour-input-group:hover .hour-btn {
    color: rgba(255, 255, 255, 0.6);
}

.hour-btn:hover {
    color: var(--cat-color, white) !important;
    background: rgba(255, 255, 255, 0.1);
}

.hour-btn:active {
    transform: scale(0.9);
}

.hour-value {
    min-width: 40px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cat-color, var(--text-primary));
    cursor: pointer;
}

.hour-value::after {
    content: 'h';
    font-size: 1em;
    font-weight: 600;
    opacity: 1;
    margin-left: 0;
}

.hour-value:hover {
    cursor: text;
    opacity: 0.8;
}

/* Hide the 'h' suffix when editing */
.hour-value:has(input)::after {
    display: none;
}

.hour-edit-input {
    width: 32px;
    background: var(--bg-tertiary);
    border: 1px solid var(--cat-color, var(--accent-project));
    border-radius: 4px;
    color: var(--cat-color, var(--text-primary));
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    padding: 2px 0;
    outline: none;
    box-sizing: border-box;
}

.hour-edit-input::-webkit-outer-spin-button,
.hour-edit-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.hour-edit-input {
    -moz-appearance: textfield;
}

.summary-card[style*="--cat-color"] {
    border-color: color-mix(in srgb, var(--cat-color) 30%, transparent);
}

.summary-card[style*="--cat-color"] .card-value {
    color: var(--cat-color);
    text-shadow: 0 0 20px color-mix(in srgb, var(--cat-color) 40%, transparent);
}

/* Edit categories button */
.col-settings {
    width: 40px;
    text-align: center;
}

.edit-categories-btn {
    background: transparent;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s, transform 0.2s;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.edit-categories-btn:hover {
    opacity: 1;
    transform: rotate(45deg);
    background: var(--bg-hover);
}

/* Category Management Modal */
.category-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.category-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.category-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.category-modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.category-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    position: relative;
}

.category-icon-picker,
.category-color-picker {
    position: relative;
}

.icon-btn,
.color-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, transform 0.2s;
}

.icon-btn:hover,
.color-btn:hover {
    border-color: var(--border-highlight);
    transform: scale(1.05);
}

.icon-dropdown,
.color-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    display: none;
    z-index: 10;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.icon-dropdown.open,
.color-dropdown.open {
    display: grid;
}

.icon-dropdown {
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    width: 200px;
}

.color-dropdown {
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    width: 160px;
}

.icon-option,
.color-option {
    width: 32px;
    height: 32px;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, transform 0.2s;
}

.icon-option:hover,
.color-option:hover {
    transform: scale(1.1);
}

.icon-option.selected,
.color-option.selected {
    border-color: var(--accent-project);
}

.category-name-input {
    flex: 1;
    padding: 0.625rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.category-name-input:focus {
    outline: none;
    border-color: var(--accent-project);
}

.delete-category-btn,
.archive-category-btn,
.restore-category-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s, color 0.2s;
}

.delete-category-btn:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.archive-category-btn:hover:not(:disabled) {
    background: rgba(249, 115, 22, 0.2);
    color: #f97316;
}

.restore-category-btn:hover {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.visibility-category-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    color: #3b82f6;
}

.hard-delete-category-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

/* Chart hidden indicator */
.category-item.chart-hidden {
    opacity: 0.6;
}

.category-item.chart-hidden::after {
    content: 'Hidden from charts';
    position: absolute;
    right: 140px;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.delete-category-btn:disabled,
.archive-category-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Category Sections */
.category-section {
    margin-bottom: 1.5rem;
}

.category-section-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.archived-section {
    opacity: 0.7;
}

.archived-section .category-section-title {
    color: var(--text-muted);
}

/* Archived Category Item */
.category-item.archived {
    background: var(--bg-secondary);
    border-style: dashed;
    padding: 0.5rem 0.75rem;
}

.category-item.archived .archived-icon {
    font-size: 1.25rem;
    opacity: 0.7;
}

.category-item.archived .archived-name {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.category-item.archived .archived-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    opacity: 0.7;
}

.add-category-btn {
    width: 100%;
    padding: 0.75rem;
    background: transparent;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.95rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.add-category-btn:hover {
    border-color: var(--accent-project);
    color: var(--accent-project);
    background: rgba(6, 182, 212, 0.1);
}

.category-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.modal-cancel-btn,
.modal-save-btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-cancel-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.modal-cancel-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-save-btn {
    background: linear-gradient(135deg, var(--accent-project), var(--accent-study));
    border: none;
    color: white;
}

.modal-save-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

/* Hard Delete Confirmation Modal */
.delete-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    animation: fadeIn 0.2s ease-out;
}

.delete-modal {
    background: var(--bg-secondary);
    border: 1px solid #ef4444;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(239, 68, 68, 0.2);
    animation: slideUp 0.3s ease-out;
}

.delete-modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.delete-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: #ef4444;
}

.delete-modal-body {
    padding: 1.5rem;
}

.delete-modal-body p {
    margin: 0 0 1rem 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.delete-modal-body .warning-text {
    color: #ef4444;
    font-size: 0.9rem;
    background: rgba(239, 68, 68, 0.1);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border-left: 3px solid #ef4444;
}

.confirm-input-wrapper {
    margin-top: 1.25rem;
}

.confirm-input-wrapper label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.confirm-input-wrapper input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    text-align: center;
    letter-spacing: 0.1em;
}

.confirm-input-wrapper input:focus {
    outline: none;
    border-color: #ef4444;
}

.delete-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.modal-delete-btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    background: #ef4444;
    border: none;
    color: white;
}

.modal-delete-btn:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-1px);
}

.modal-delete-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}