/* ==========================================
   CSS Custom Variables — Light & Dark Themes
   ========================================== */
:root[data-theme="light"] {
    --bg-primary: #fcfbf7;
    --bg-secondary: #f4f3ed;
    --bg-card: rgba(255, 255, 255, 0.80);
    --border-color: rgba(206, 203, 190, 0.5);
    --border-color-strong: rgba(206, 203, 190, 0.85);
    --text-primary: #2d312e;
    --text-secondary: #6e7570;
    --shadow-soft: 0 8px 28px rgba(89, 87, 75, 0.08);
    --shadow-medium: 0 16px 44px rgba(89, 87, 75, 0.13);

    --color-available: #2e7d32;
    --color-available-hover: #1b5e20;
    --color-unavailable: #e0e0e0;
    --color-unavailable-text: #9e9e9e;

    --accent: #e67e22;
    --accent-hover: #d35400;
    --accent-shadow: rgba(230, 126, 34, 0.22);

    --btn-primary-bg: #e67e22;
    --btn-primary-text: #ffffff;
    --btn-primary-hover: #d35400;

    --glass-blur: 12px;
}

:root[data-theme="dark"] {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: rgba(22, 28, 45, 0.80);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-strong: rgba(255, 255, 255, 0.15);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --shadow-soft: 0 8px 28px rgba(0, 0, 0, 0.40);
    --shadow-medium: 0 16px 44px rgba(0, 0, 0, 0.52);

    --color-available: #10b981;
    --color-available-hover: #059669;
    --color-unavailable: #2d3748;
    --color-unavailable-text: #64748b;

    --accent: #d97706;
    --accent-hover: #b45309;
    --accent-shadow: rgba(217, 119, 6, 0.22);

    --btn-primary-bg: #e67e22;
    --btn-primary-text: #ffffff;
    --btn-primary-hover: #d35400;

    --glass-blur: 16px;
}

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Subtle background radial glow */
body::before {
    content: '';
    position: fixed;
    top: -100px;
    left: 30%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--accent-shadow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ==========================================
   Header
   ========================================== */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2.5rem;
    background-color: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-soft);
}

.logo-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    font-size: 1.9rem;
    letter-spacing: -0.5px;
    background: linear-gradient(120deg, var(--text-primary) 20%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    line-height: 1;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 6px;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
}

.btn-block {
    width: 100%;
    padding: 0.75rem;
}

.btn-primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border-color: var(--btn-primary-bg);
}
.btn-primary:hover {
    background-color: var(--btn-primary-hover);
    border-color: var(--btn-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px var(--accent-shadow);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    border-color: var(--border-color-strong);
    background-color: var(--bg-card);
}

.btn-success {
    background-color: var(--color-available);
    color: #ffffff;
    border-color: var(--color-available);
}
.btn-success:hover {
    background-color: var(--color-available-hover);
    border-color: var(--color-available-hover);
    box-shadow: 0 4px 14px rgba(46, 125, 50, 0.30);
    transform: translateY(-1px);
}

.btn-outline-danger {
    background: transparent;
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.4);
}
.btn-outline-danger:hover {
    background: #ef4444;
    color: #ffffff;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}
.btn-icon:hover {
    background-color: var(--border-color-strong);
    transform: scale(1.08);
}

.btn-icon-xs {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.75rem;
}
.btn-icon-xs:hover {
    background-color: var(--border-color-strong);
    color: var(--text-primary);
}

/* ==========================================
   User Badge
   ========================================== */
.user-badge-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-badge {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.45rem 0.85rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

/* ==========================================
   Main App Container
   ========================================== */
.app-container {
    flex: 1;
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ==========================================
   Calendar Card
   ========================================== */
.calendar-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem 2.25rem;
    box-shadow: var(--shadow-medium);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ==========================================
   Admin Bar
   ========================================== */
.admin-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    background-color: var(--bg-secondary);
    padding: 0.625rem 1.1rem;
    border-radius: 10px;
    border: 1px dashed var(--border-color-strong);
}

.badge-admin {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.25);
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 5px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.admin-bar-buttons {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

/* ==========================================
   Month Range Badge
   ========================================== */
.month-span-header {
    display: flex;
    justify-content: center;
}

.calendar-range-badge {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.45rem 1.25rem;
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.calendar-range-badge strong {
    color: var(--text-primary);
}

/* ==========================================
   Calendar Grid of Months
   ========================================== */
.calendars-grid-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .calendars-grid-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 960px) {
    .calendars-grid-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

.calendar-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    color: var(--text-secondary);
    gap: 0.75rem;
    font-size: 1rem;
    grid-column: 1 / -1;
}

/* ==========================================
   Individual Month Panel
   ========================================== */
.month-panel {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.1rem 1rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.month-panel:hover {
    border-color: var(--border-color-strong);
    box-shadow: 0 4px 16px rgba(0,0,0,0.05);
}

.month-name {
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    text-transform: capitalize;
    letter-spacing: 0.3px;
}

/* ==========================================
   Days Grid
   ========================================== */
.month-days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
}

.day-header {
    text-align: center;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 0.2rem 0 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.day-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 5px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    user-select: none;
    border: 1.5px solid transparent;
}

.day-cell.empty {
    background: transparent;
    pointer-events: none;
}

/* Status colours */
.day-cell.status-unavailable {
    background-color: var(--color-unavailable);
    color: var(--color-unavailable-text);
}

.day-cell.status-available {
    background-color: var(--color-available);
    color: #ffffff;
    font-weight: 600;
}

/* Edit mode interactions */
body:not(.edit-mode) .day-cell {
    cursor: default;
}

body.edit-mode .day-cell:not(.empty) {
    cursor: pointer;
}

body.edit-mode .day-cell:not(.empty):hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(0,0,0,0.18);
    z-index: 5;
    border-color: var(--accent);
}

body.edit-mode .day-cell.active-edit {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

/* ==========================================
   Calendar Footer: Legend + CTA
   ========================================== */
.calendar-footer {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

@media (min-width: 640px) {
    .calendar-footer {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.legend-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.color-available  { background-color: var(--color-available); }
.color-unavailable { background-color: var(--color-unavailable); border: 1px solid var(--border-color-strong); }

.legend-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.bottom-action-container {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-shrink: 0;
}

/* ==========================================
   Footer
   ========================================== */
.main-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-card);
    position: relative;
    z-index: 1;
}

.main-footer strong {
    color: var(--text-primary);
}

/* ==========================================
   Modals
   ========================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.52);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s ease;
    padding: 1rem;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color-strong);
    border-radius: 16px;
    max-width: 430px;
    width: 100%;
    box-shadow: var(--shadow-medium);
    transform: translateY(-18px) scale(0.98);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-card {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.1rem 1.4rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-body {
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.modal-intro-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* ==========================================
   Forms
   ========================================== */
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 500px) {
    .form-row { grid-template-columns: repeat(2, 1fr); }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="month"],
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-shadow);
}

.input-icon-wrapper {
    position: relative;
}

.input-icon-wrapper > i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 0.875rem;
    pointer-events: none;
}

.input-icon-wrapper input {
    padding-left: 2.25rem !important;
}

/* ==========================================
   Alerts
   ========================================== */
.alert {
    padding: 0.7rem 1rem;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-available);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ==========================================
   Day Status Popover
   ========================================== */
.day-popover {
    position: absolute;
    z-index: 500;
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color-strong);
    border-radius: 12px;
    padding: 0.65rem;
    box-shadow: var(--shadow-medium);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    width: 200px;
    animation: popIn 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.93) translateY(-4px); }
    to   { opacity: 1; transform: scale(1)    translateY(0);    }
}

.popover-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4rem;
    margin-bottom: 0.1rem;
}

#popover-date-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.popover-options {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.status-option-btn {
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: background-color 0.14s;
}

.status-option-btn:hover {
    background-color: var(--bg-secondary);
}

.status-indicator {
    width: 11px;
    height: 11px;
    border-radius: 3px;
    flex-shrink: 0;
}

/* ==========================================
   Utilities
   ========================================== */
.hidden {
    display: none !important;
}