/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0f1118;
    --surface: #1a1d27;
    --surface2: #232733;
    --border: #2e3345;
    --text: #e4e6ed;
    --text-dim: #8b8fa3;
    --accent: #4a90d9;
    --accent-hover: #5ba0e9;
    --danger: #e05555;
    --danger-hover: #f06666;
    --radius: 10px;
    --radius-sm: 6px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* === App Container === */
.app {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 16px;
}

/* === Header === */
.header {
    text-align: center;
    padding: 16px 0 12px;
    position: relative;
}

.header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
}

.logout-btn {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* === Login Page === */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 40px 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.login-card h1 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--accent);
}

.login-error {
    background: rgba(224, 85, 85, 0.15);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.login-btn {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    margin-top: 8px;
}

/* === Tabs === */
.tabs {
    display: flex;
    gap: 4px;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 4px;
    margin-bottom: 20px;
}

.tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.tab:hover { color: var(--text); }
.tab.active {
    background: var(--accent);
    color: #fff;
}

/* === Calendar Nav === */
.calendar-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.calendar-nav h2 {
    flex: 1;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: capitalize;
}

.calendar-nav button {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.calendar-nav button:hover {
    background: var(--surface2);
    border-color: var(--accent);
}

.today-btn {
    width: auto !important;
    padding: 0 14px !important;
    font-size: 0.85rem !important;
    font-weight: 500;
}

/* === Calendar Grid === */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 20px;
}

.day-header {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    padding: 8px 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calendar-days {
    display: contents;
}

.day-cell {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    min-height: 52px;
    gap: 2px;
    padding: 4px;
}

.day-cell:hover {
    transform: scale(1.05);
    z-index: 1;
}

.day-cell.empty {
    cursor: default;
    opacity: 0;
}

.day-cell.empty:hover {
    transform: none;
}

.day-cell .day-number {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1;
}

.day-cell .day-location {
    font-size: 0.55rem;
    font-weight: 500;
    text-align: center;
    line-height: 1.1;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    opacity: 0.9;
}

.day-cell.has-entry {
    color: #fff;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.day-cell.no-entry {
    background: var(--surface2);
    color: var(--text-dim);
}

.day-cell.today {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.day-cell.today .day-number {
    color: var(--accent);
}

.day-cell.has-entry.today .day-number {
    color: #fff;
}

/* === Stats Panel === */
.stats-panel {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 16px;
}

.stats-panel h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dim);
}

.stats-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex-shrink: 0;
}

.stat-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.stat-days {
    font-size: 0.85rem;
    color: var(--text-dim);
    font-weight: 500;
}

.stats-empty {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-style: italic;
}

/* === Locations Panel === */
.location-form {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.location-form input[type="text"] {
    flex: 1;
    padding: 10px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.location-form input[type="text"]:focus {
    border-color: var(--accent);
}

.location-form input[type="color"] {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    cursor: pointer;
    padding: 3px;
}

.location-form button {
    width: 42px;
    height: 42px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
}

.location-form button:hover {
    background: var(--accent-hover);
}

.locations-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.location-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 14px 16px;
    transition: background 0.2s;
}

.location-card:hover {
    background: var(--surface2);
}

.location-color-dot {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    flex-shrink: 0;
}

.location-info {
    flex: 1;
    min-width: 0;
}

.location-info .loc-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.location-info .loc-address {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.location-actions {
    display: flex;
    gap: 6px;
}

.location-actions button {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-dim);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.location-actions button:hover {
    border-color: var(--accent);
    color: var(--text);
}

.location-actions button.delete-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* === Modal === */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal[hidden] { display: none; }

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.6);
}

.modal-content {
    position: relative;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.modal-content h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.modal-body label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-body select,
.modal-body input[type="text"] {
    padding: 10px 14px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.modal-body select:focus,
.modal-body input[type="text"]:focus {
    border-color: var(--accent);
}

.modal-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.modal-actions-right {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

.btn-primary,
.btn-secondary,
.btn-danger {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); }

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}
.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

/* === Responsive === */
@media (max-width: 600px) {
    .app { padding: 12px 10px; }
    .header h1 { font-size: 1.3rem; }

    .day-cell {
        min-height: 40px;
    }

    .day-cell .day-number { font-size: 0.75rem; }
    .day-cell .day-location { font-size: 0.5rem; }

    .location-form {
        flex-wrap: wrap;
    }

    .location-form input[type="text"] {
        min-width: calc(50% - 4px);
    }

    .calendar-nav h2 { font-size: 1rem; }
}