/* ==========================================================================
   MKMU Alumni Map & Directory - Style Sheet
   Premium Modern Design (Deep Ocean Navy & Sea Teal Accent)
   ========================================================================== */

/* Design Tokens / Variables */
:root {
    --primary: #0b2545;
    --primary-light: #134074;
    --primary-rgb: 11, 37, 69;
    --accent: #139a8c;
    --accent-hover: #1abc9c;
    --accent-rgb: 19, 154, 140;
    --secondary: #8da9c4;
    --secondary-light: #eeeff4;

    --bg-main: #f4f6f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f9fbfd;
    --border-color: #e2e8f0;

    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-light: #ffffff;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --info: #3b82f6;

    --font-sans: 'Noto Sans KR', sans-serif;
    --font-heading: 'Outfit', 'Noto Sans KR', sans-serif;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-premium: 0 8px 32px 0 rgba(11, 37, 69, 0.08);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    outline: none;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Custom Scrollbar */
.scroll-container::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.scroll-container::-webkit-scrollbar-track {
    background: transparent;
}

.scroll-container::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.scroll-container::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ==========================================================================
   1. APP CONTAINER & HEADER (Premium Dark Glass style)
   ========================================================================== */
#app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    position: relative;
}

#main-header {
    background-color: var(--primary);
    color: var(--text-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    border-bottom: 2px solid var(--accent);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    color: var(--accent);
    filter: drop-shadow(0 0 8px rgba(19, 154, 140, 0.6));
    animation: anchorPulse 4s infinite ease-in-out;
}

.logo-text h1 {
    font-size: 20px;
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.logo-text p {
    font-size: 11px;
    color: var(--secondary);
    font-weight: 300;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-bounce);
    font-size: 14px;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--text-light);
    box-shadow: 0 4px 12px rgba(19, 154, 140, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(19, 154, 140, 0.45);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-outline-primary {
    border: 1.5px solid var(--accent);
    color: var(--accent);
    background: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--accent);
    color: var(--text-light);
}

.btn-outline-secondary {
    border: 1.5px solid var(--border-color);
    color: var(--text-muted);
    background: transparent;
}

.btn-outline-secondary:hover {
    background-color: var(--secondary-light);
    color: var(--text-main);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

.btn-block {
    width: 100%;
}

.btn-text-link {
    color: var(--accent);
    font-size: 12px;
    font-weight: 500;
    text-decoration: underline;
}

.btn-text-link:hover {
    color: var(--accent-hover);
}

/* ==========================================================================
   2. MAIN LAYOUT (Flex / Split View)
   ========================================================================== */
#main-layout {
    display: flex;
    flex: 1;
    position: relative;
    overflow: hidden;
}

/* Map Panel (Fills the layout) */
#map-panel {
    flex: 1;
    position: relative;
    height: 100%;
}

#map {
    height: 100%;
    width: 100%;
    z-index: 1;
}

.map-banner {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(11, 37, 69, 0.9);
    color: var(--text-light);
    padding: 10px 20px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 500;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

/* Sidebar Panel */
#sidebar-panel {
    width: 420px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 999;
    transition: var(--transition);
    height: 100%;
}

/* ==========================================================================
   3. SIDEBAR COMPONENTS (Tabs, Search, Filter, List, Calendar)
   ========================================================================== */

/* Tabs Control */
.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-main);
    padding: 6px 12px 0 12px;
    gap: 6px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
}

.tab-btn:hover {
    color: var(--primary);
    background-color: rgba(0, 0, 0, 0.02);
}

.tab-btn.active {
    color: var(--accent);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-bottom: 1px solid var(--bg-card);
    margin-bottom: -1px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.02);
}

/* Tab Contents Pane */
.tab-contents {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.tab-pane {
    display: none;
    height: 100%;
    flex-direction: column;
}

.tab-pane.active {
    display: flex;
}

/* Search and Filters Box */
.search-filter-box {
    padding: 16px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
}

.search-input-wrapper {
    position: relative;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
}

.clear-btn {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

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

#search-keyword {
    width: 100%;
    padding: 12px 14px 12px 38px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background-color: var(--bg-main);
    transition: var(--transition);
}

#search-keyword:focus {
    border-color: var(--accent);
    background-color: var(--bg-card);
    outline: none;
    box-shadow: 0 0 0 3px rgba(19, 154, 140, 0.15);
}

.filters-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-group label {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

.filter-group select {
    padding: 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-main);
    font-size: 13px;
    outline: none;
    transition: var(--transition);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 14px;
    padding-right: 30px;
}

.filter-group select:focus {
    border-color: var(--accent);
    background-color: var(--bg-card);
}

/* List Summary Section */
.list-summary {
    padding: 8px 16px;
    background-color: var(--bg-main);
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.list-summary strong {
    color: var(--primary);
    font-weight: 700;
}

/* Alumni Cards List */
.scroll-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--text-muted);
    text-align: center;
    gap: 12px;
}

.empty-state i {
    font-size: 40px;
    color: var(--secondary);
}

.empty-state p {
    font-size: 14px;
}

/* Individual Card (Premium Style) */
.alumni-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.alumni-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--accent);
    transform: scaleY(0);
    transition: var(--transition);
}

.alumni-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary);
    background-color: var(--bg-card-hover);
}

.alumni-card:hover::before {
    transform: scaleY(1);
}

.alumni-card.selected-card {
    border-color: var(--accent);
    background-color: rgba(19, 154, 140, 0.03);
    box-shadow: var(--shadow-md);
}

.alumni-card.selected-card::before {
    transform: scaleY(1);
}

.card-header-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
    gap: 8px;
}

.card-category-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 30px;
    display: inline-block;
}

/* Category Colors */
.badge-restaurant {
    background-color: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

.badge-maritime {
    background-color: rgba(59, 130, 246, 0.12);
    color: #1d4ed8;
}

.badge-corp {
    background-color: rgba(139, 92, 246, 0.12);
    color: #6d28d9;
}

.badge-service {
    background-color: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.badge-etc {
    background-color: rgba(100, 116, 139, 0.12);
    color: #475569;
}

.card-region-badge {
    background-color: var(--secondary-light);
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 500;
    padding: 3px 8px;
    border-radius: 30px;
}

.card-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    line-height: 1.3;
}

.card-title.badge-restaurant { color: #b45309; }
.card-title.badge-maritime { color: #1d4ed8; }
.card-title.badge-corp { color: #6d28d9; }
.card-title.badge-service { color: #047857; }
.card-title.badge-etc { color: #475569; }

.card-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.4;
}

.card-details {
    border-top: 1px dashed var(--border-color);
    padding-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 12px;
}

.card-detail-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.card-detail-item i {
    width: 14px;
    text-align: center;
    color: var(--accent);
}

.card-alumni-tag {
    background-color: rgba(11, 37, 69, 0.05);
    color: var(--primary-light);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    align-self: flex-start;
}

.card-alumni-tag i {
    color: var(--accent);
}

.card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}

/* Interactive Marker Popups for Leaflet */
.leaflet-popup-content-wrapper {
    border-radius: var(--radius-md);
    padding: 0;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.leaflet-popup-content {
    margin: 0 !important;
    width: 280px !important;
    font-family: var(--font-sans);
}

.map-popup-card {
    padding: 16px;
}

.map-popup-header {
    margin-bottom: 8px;
}

.map-popup-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.map-popup-badge-row {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.map-popup-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.4;
}

.map-popup-details {
    font-size: 11px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    border-top: 1px solid var(--secondary-light);
    padding-top: 8px;
    color: var(--text-muted);
}

.map-popup-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background-color: var(--accent);
    color: var(--text-light) !important;
    padding: 8px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    margin-top: 10px;
    text-align: center;
    font-size: 11px;
}

.map-popup-link:hover {
    background-color: var(--accent-hover);
    text-decoration: none;
}

/* ==========================================================================
   4. CALENDAR SECTION
   ========================================================================== */
.calendar-section {
    padding: 16px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.calendar-header h3 {
    font-size: 16px;
    color: var(--primary);
}

.cal-nav-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: var(--transition);
}

.cal-nav-btn:hover {
    background-color: var(--secondary-light);
    color: var(--accent);
}

.calendar-wrapper {
    width: 100%;
}

.weekdays-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.weekdays-grid span:first-child {
    color: var(--danger);
}

.weekdays-grid span:last-child {
    color: var(--info);
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    row-gap: 6px;
    column-gap: 4px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.calendar-day:hover:not(.empty-day) {
    background-color: var(--bg-main);
}

.calendar-day.empty-day {
    cursor: default;
    pointer-events: none;
}

.calendar-day.sunday {
    color: var(--danger);
}

.calendar-day.saturday {
    color: var(--info);
}

.calendar-day.today {
    background-color: rgba(11, 37, 69, 0.08);
    font-weight: 700;
    border: 1px solid var(--primary);
}

.calendar-day.selected {
    background-color: var(--accent) !important;
    color: var(--text-light) !important;
}

/* Event Dot Indicator */
.calendar-day.has-event::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--accent);
}

.calendar-day.selected.has-event::after {
    background-color: var(--text-light);
}

/* Events List Sub-section */
.events-list-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.events-header {
    padding: 12px 16px;
    background-color: var(--bg-main);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.events-header h4 {
    font-size: 13px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.events-header span {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

/* Event Card */
.event-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.event-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary);
}

.event-type-badge {
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 30px;
    align-self: flex-start;
}

.badge-meet {
    background-color: rgba(59, 130, 246, 0.1);
    color: #2563eb;
}

.badge-seminar {
    background-color: rgba(139, 92, 246, 0.1);
    color: #7c3aed;
}

.badge-festival {
    background-color: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.badge-family {
    background-color: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.event-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
}

.event-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
}

.event-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 11px;
    color: var(--text-muted);
    border-top: 1px dashed var(--border-color);
    padding-top: 8px;
}

.event-detail-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.event-detail-item i {
    color: var(--accent);
    width: 12px;
    text-align: center;
}

/* ==========================================================================
   5. MODAL SYSTEM (Glassmorphism Modal Overlays)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(11, 37, 69, 0.4);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

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

.modal-container {
    background-color: var(--bg-card);
    width: 90%;
    max-width: 650px;
    max-height: 85vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-container {
    transform: scale(1);
}

.modal-header {
    background-color: var(--primary);
    color: var(--text-light);
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--accent);
}

.modal-header h2 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-close-modal {
    color: var(--secondary);
    font-size: 20px;
    transition: var(--transition);
}

.btn-close-modal:hover {
    color: var(--text-light);
    transform: rotate(90deg);
}

.modal-body {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.modal-alert-box {
    display: flex;
    gap: 10px;
    padding: 12px;
    border-radius: var(--radius-md);
    font-size: 12px;
    line-height: 1.4;
    margin-bottom: 16px;
}

.modal-alert-box.info {
    background-color: rgba(59, 130, 246, 0.08);
    color: #1d4ed8;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.modal-alert-box.info i {
    font-size: 14px;
    color: var(--info);
}

/* Forms Styling */
.form-section-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    margin: 16px 0 10px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

.form-section-title:first-of-type {
    margin-top: 0;
}

.form-group {
    margin-bottom: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-row {
    display: grid;
    gap: 10px;
}

.grid-2 {
    grid-template-columns: 1fr 1fr;
}

.grid-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
}

.required {
    color: var(--danger);
}

input[type="text"],
input[type="url"],
input[type="tel"],
input[type="password"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    transition: var(--transition);
    outline: none;
    background-color: var(--bg-main);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 3px rgba(19, 154, 140, 0.15);
}

.input-with-button {
    display: flex;
    gap: 8px;
}

.input-with-button input {
    flex: 1;
}

.input-with-button button {
    white-space: nowrap;
}

.form-helper {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

.coords-display {
    display: flex;
    gap: 12px;
    background-color: var(--secondary-light);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    margin-top: 6px;
}

.coords-display strong {
    color: var(--primary-light);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--border-color);
    padding: 16px 20px;
    background-color: var(--bg-main);
}

/* ==========================================================================
   6. ADMIN PANEL DASHBOARD
   ========================================================================== */
.admin-container {
    max-width: 800px;
    width: 95%;
}

.admin-instruction {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 16px;
}

.admin-login-form {
    display: flex;
    gap: 8px;
    max-width: 380px;
    margin: 0 auto;
}

.admin-login-form input {
    flex: 1;
}

.error-msg {
    color: var(--danger);
    font-size: 12px;
    text-align: center;
    margin-top: 8px;
}

/* Admin Tab Subnavigation */
.admin-subtabs {
    display: flex;
    border-bottom: 1.5px solid var(--border-color);
    margin-bottom: 16px;
    gap: 8px;
}

.admin-subtab-btn {
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.admin-subtab-btn:hover {
    color: var(--primary);
}

.admin-subtab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.admin-subpane {
    display: none;
}

.admin-subpane.active {
    display: block;
}

.admin-list-container {
    max-height: 450px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Admin Item Card */
.admin-item-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.admin-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.admin-item-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.admin-item-details {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.admin-item-alumni {
    background-color: rgba(19, 154, 140, 0.08);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

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

/* Admin Event Setup layout */
.admin-event-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.admin-event-form-box {
    border-right: 1px solid var(--border-color);
    padding-right: 20px;
}

.admin-event-form-box h4,
.admin-event-list-box h4 {
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 700;
    border-left: 3px solid var(--accent);
    padding-left: 8px;
}

.admin-event-list-box {
    height: 100%;
}

.admin-event-list-box .admin-list-container {
    max-height: 380px;
}

.admin-event-item {
    padding: 12px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ==========================================================================
   7. RESPONSIVE DESIGN (Mobile First Implementation)
   ========================================================================== */

/* Mobile Action Toggles */
.btn-floating {
    position: absolute;
    bottom: 24px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(19, 154, 140, 0.4);
    z-index: 998;
    font-size: 20px;
    transition: var(--transition-bounce);
}

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

/* Mobile Bottom Tab Bar (Default for Mobile) */
#mobile-tab-bar {
    display: flex;
    background-color: var(--primary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    height: 60px;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
}

.mobile-tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--secondary);
    font-size: 11px;
    transition: var(--transition);
}

.mobile-tab-btn i {
    font-size: 18px;
}

.mobile-tab-btn.active {
    color: var(--accent);
}

.mobile-tab-btn.active i {
    transform: scale(1.1);
    filter: drop-shadow(0 0 4px rgba(19, 154, 140, 0.4));
}

/* Mobile Styling Rules (Width < 768px) */
@media (max-width: 767px) {
    #main-header .logo-text p {
        display: none;
    }

    #main-header .btn span {
        display: none;
        /* Icon only on mobile header */
    }

    #main-header .btn {
        padding: 8px 12px;
    }

    #sidebar-panel {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        transform: translateX(-100%);
        border-right: none;
    }

    #sidebar-panel.mobile-active {
        transform: translateX(0);
    }

    /* Map visual adjustments for mobile */
    .map-banner {
        top: 10px;
        width: 90%;
        justify-content: center;
        font-size: 10px;
        padding: 8px 12px;
    }

    .admin-event-grid {
        grid-template-columns: 1fr;
    }

    .admin-event-form-box {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: 20px;
        margin-bottom: 20px;
    }

    .admin-container {
        height: 90vh;
        max-height: 90vh;
    }
}

/* Desktop Styling Rules (Width >= 768px) */
@media (min-width: 768px) {
    #mobile-tab-bar {
        display: none;
        /* Hide bottom tab bar */
    }

    #btn-mobile-toggle {
        display: none;
        /* Hide mobile floating toggle */
    }

    #sidebar-panel {
        transform: translateX(0) !important;
        /* Always visible */
    }
}

/* Keyframes Animations */
@keyframes anchorPulse {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-3px) rotate(5deg);
    }
}