:root {
    --primary: #D32D7E;
    --primary-gradient: linear-gradient(135deg, #E04F90, #D32D7E);
    /* Light Theme Variables */
    --bg-dark: #f8f9fa;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.05);
    /* Softer border for light mode */
    --text: #1a1a1a;
    --text-muted: #666666;
    --card-hover: rgba(0, 0, 0, 0.03);
    --input-bg: rgba(255, 255, 255, 0.8);
    --danger: #dc3545;
    --danger-bg: rgba(220, 53, 69, 0.1);
}

html {
    background: transparent;
    height: 100%;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    margin: 0;
    padding: 0;
    padding-top: env(safe-area-inset-top, 0px);
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    /* White Gradient */
    background-image: linear-gradient(135deg, #ffffff 0%, #f0f2f5 100%);
    background-attachment: fixed;
    height: 100%;
    min-height: 100dvh;
}

/* Views */
.view {
    display: none;
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom, 20px);
}

.view.active {
    display: block;
}

/* Glassmorphism */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    /* Lighter shadow */
}

/* Login */
.login-container {
    max-width: 300px;
    margin: 0 auto;
    padding-top: 60px;
    text-align: center;
}

.app-logo {
    width: 250px;
    height: auto;
    margin-bottom: 20px;
}

h1 {
    color: var(--primary);
    /* Accent color for main title */
}

input,
select {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text);
    /* Dark text */
    box-sizing: border-box;
    font-size: 16px;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    background: #ffffff;
}

button {
    background: var(--primary);
    background-image: var(--primary-gradient);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    width: 100%;
    transition: transform 0.1s, box-shadow 0.2s, filter 0.2s;
}

button:active {
    transform: scale(0.98);
}

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

/* Dashboard */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: 20px;
    padding: env(safe-area-inset-top) 20px 0;
    height: calc(64px + env(safe-area-inset-top));
    box-sizing: border-box;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

header.glass {
    box-shadow: none;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-bottom: 1px solid var(--glass-border);
    border-radius: 0;
    padding: env(safe-area-inset-top) 20px 0;
    height: calc(64px + env(safe-area-inset-top));
}

h1,
h2,
h3 {
    margin: 0;
    font-weight: 600;
    justify-self: center;
    color: var(--text);
}

/* Left aligned items */
.header-left {
    justify-self: start;
    display: flex;
    align-items: center;
}

/* Right aligned items */
.header-right {
    justify-self: end;
    display: flex;
    align-items: center;
}

.header-center {
    grid-column: 2;
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 15px;
}

header>h2 {
    grid-column: 2;
    justify-self: center;
}

header .back-btn {
    grid-column: 1;
}

.logout-btn,
.back-btn {
    width: auto;
    background: transparent;
    background-image: none;
    border: 1px solid var(--glass-border);
    color: var(--text);
}

.logout-btn:hover,
.back-btn:hover {
    background: var(--card-hover);
}

.back-btn.icon-only {
    font-size: 1.2em;
    padding: 8px 12px;
    line-height: 1;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    padding-top: 0;
}

.course-card {
    margin-bottom: 15px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.course-card:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.course-meta {
    font-size: 0.9em;
    color: var(--text-muted);
    margin-top: 5px;
}

/* Course View */
.controls {
    margin-bottom: 20px;
}

/* Date Slider */
.date-slider {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding: 10px 0;
    margin-bottom: 0;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* Adjust mask for light theme visibility logic if needed, 
       but transparency works for both. Keeps sides faded. */
    mask-image: linear-gradient(to right, transparent, black 10%);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%);
}

.date-slider::-webkit-scrollbar {
    display: none;
}

.date-card {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    height: 60px;
    padding: 5px;
    border-radius: 8px;
    background: white;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    opacity: 0.8;
    color: var(--text);
}

.date-card:hover {
    background: #f0f0f0;
    opacity: 1;
}

.date-card.active {
    background: var(--primary);
    background-image: var(--primary-gradient);
    border-color: var(--primary);
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(211, 45, 126, 0.3);
    opacity: 1;
    z-index: 1;
    color: white;
}

.date-card .weekday {
    font-size: 0.75em;
    font-weight: 600;
    margin-bottom: 2px;
    text-transform: uppercase;
}

.date-card .date {
    font-size: 1.0em;
    font-weight: bold;
}

.schedules-tag {
    display: inline-block;
    background: rgba(211, 45, 126, 0.1);
    /* Lighter background for tag */
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    margin-right: 5px;
}

/* Participants List */
.couple-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.participant-card {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: white;
    /* Stronger background for cards */
}

.p-info {
    display: flex;
    flex-direction: column;
}

.p-name {
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.p-percent {
    font-size: 0.75em;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--text-muted);
}

.p-details {
    font-size: 0.8em;
    color: var(--text-muted);
}

.check-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid #ddd;
    background: transparent;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    /* Checkmark color */
}

.check-btn.checked {
    background: var(--primary);
    background-image: var(--primary-gradient);
    border-color: var(--primary);
}

/* Mobile: Stack couples */
@media (max-width: 600px) {
    .couple-row {
        flex-direction: column;
        gap: 10px;
        margin-bottom: 20px;
        background: rgba(255, 255, 255, 0.5);
        padding: 10px;
        border-radius: 12px;
    }
}

/* Floating Action Button */
.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 30px;
    box-shadow: 0 4px 15px rgba(211, 45, 126, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    /* Lighter backdrop */
    backdrop-filter: blur(5px);
}

.modal-content {
    margin: 20% auto;
    width: 80%;
    max-width: 400px;
    position: relative;
    background: white;
    /* Solid white for readibility */
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-muted);
}

/* Tag Input */
.tag-input-container {
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 5px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    align-items: center;
    position: relative;
}

.tag-input-container input {
    background: transparent;
    border: none;
    outline: none;
    flex: 1;
    min-width: 120px;
    margin: 0;
    padding: 8px;
    color: var(--text);
}

.tag-input-container {
    padding-right: 40px !important;
}

.tag {
    background: var(--primary);
    color: white;
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 5px;
}

.tag-remove {
    cursor: pointer;
    font-weight: bold;
    opacity: 0.7;
}

.tag-remove:hover {
    opacity: 1;
}

.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    display: none;
    margin-top: 5px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.suggestion-item {
    padding: 10px;
    cursor: pointer;
    border-bottom: 1px solid #eee;
    color: var(--text);
}

.suggestion-item:hover {
    background: #f5f5f5;
}

/* Admin Card Refinements (New Flexible Layout) */
.user-card {
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: white;
}

/* Card Header Area: Name + Actions */
.card-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.card-title-group {
    flex: 1;
}

.card-actions {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    /* Wrap buttons on very small screens */
    justify-content: flex-end;
}

/* Buttons in cards */
.danger-btn,
.secondary-btn {
    padding: 6px 12px;
    font-size: 0.8em;
    width: auto;
    border-radius: 6px;
    white-space: nowrap;
}

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

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

.secondary-btn {
    background: #f0f0f0;
    color: var(--text);
    border: 1px solid transparent;
}

.secondary-btn:hover {
    background: #e0e0e0;
}

.secondary-btn.active {
    background: var(--primary);
    color: white;
}


/* Missing Attendance Alert */
.date-card.missing {
    border: 1px solid var(--danger);
    box-shadow: 0 0 5px rgba(220, 53, 69, 0.4);
}

.date-card.missing .date {
    color: var(--danger);
}

/* Tabs */
.tab-btn {
    flex: 1;
    background: white;
    border: 1px solid var(--glass-border);
    opacity: 0.7;
    max-width: 200px;
    color: var(--text);
}

.tab-btn.active {
    background: var(--primary);
    background-image: var(--primary-gradient);
    opacity: 1;
    border-color: var(--primary);
    color: white;
}

/* Schedule Picker */
.weekday-selector {
    display: flex;
    gap: 5px;
    justify-content: space-between;
}

.day-btn {
    padding: 10px 0;
    width: 100%;
    font-size: 0.9em;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    cursor: pointer;
    color: var(--text);
}

.day-btn:hover {
    background: #f0f0f0;
}

.day-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.calendar-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2em;
    padding: 5px;
    opacity: 1;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.calendar-btn:hover {
    filter: brightness(0.8);
}

/* Admin FAB and Menu */
#admin-fab-wrapper {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.admin-fab {
    position: relative;
    /* Override fixed behavior of .floating-btn since wrapper is fixed */
    bottom: auto;
    right: auto;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    background: var(--primary);
    /* Maintain primary color */
    z-index: 201;
}

.admin-fab.open {
    transform: rotate(45deg);
    background: var(--danger);
    /* Change to close color */
}

.admin-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    /* Slightly more opaque */
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 10px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 200px;
    transform: scale(0);
    transform-origin: bottom right;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
    opacity: 0;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.admin-menu.open {
    transform: scale(1);
    opacity: 1;
}

.menu-item {
    background: transparent;
    border: none;
    color: var(--text);
    padding: 12px;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
    background-image: none;
    /* Remove gradient from default button */
    font-weight: normal;
}

.menu-item:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: translateX(-5px);
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    background: rgba(255, 255, 255, 0.6);
    border-color: var(--primary);
    transform: scale(1.02);
}

/* User List for Admin View */
#as-staff-list .user-card {
    transition: transform 0.2s;
}

/* --- Search Bar & Header Logic --- */

/* Hide header content when search is active */
header.glass.search-active> :not(.header-search-bar) {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

/* Header Search Bar Container */
.header-search-bar {
    position: absolute;
    top: calc(32px + env(safe-area-inset-top));
    right: 50%;
    height: 48px;
    width: 48px;
    max-width: 600px;
    /* Collapsed: tiny circle at center */
    background: white;
    border-radius: 24px;

    /* Layout */
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;

    /* Visuals */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid #ddd;
    overflow: hidden;
    z-index: 1001;

    /* Animation State (Collapsed) */
    opacity: 0;
    pointer-events: none;
    transform: translate(50%, -50%) scale(0);
    transform-origin: center;

    /* Transitions: Unified for all properties */
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Active State (Expanded) */
.header-search-bar.active {
    width: calc(100% - 40px);
    opacity: 1;
    pointer-events: all;
    transform: translate(50%, -50%) scale(1);
    border-radius: 12px;
    padding: 0 5px;
}

/* Search Icon (Left) */
.search-icon-wrapper {
    width: 50px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    flex-shrink: 0;
}

/* Text Input (Middle - Grows) */
#header-search-input {
    flex: 1;
    height: 100%;
    border: none;
    background: transparent;
    font-size: 1.2em;
    padding: 0 10px;
    margin: 0;
    outline: none;
    color: #000;
    min-width: 0;
}

#header-search-input::placeholder {
    color: #999;
}

/* Close/X Button (Right) */
.close-search-btn {
    width: 50px;
    height: 100%;
    background: transparent;
    border: none;
    font-size: 1.2em;
    color: #999;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.2s, transform 0.4s;
}

.header-search-bar.active .close-search-btn {
    transform: rotate(90deg);
}

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

/* Search Result Tiles (Large) */
.search-result-card {
    margin-bottom: 15px;
    padding: 15px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

.search-result-card:hover {
    transform: translateY(-2px);
    background: white;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
}

.search-section-title {
    margin: 20px 0 10px;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
}

/* User Icon Button */
.user-icon-btn {
    background: transparent;
    border: none;
    border-radius: 50%;
    width: 44px;
    /* Standard touch size */
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    flex-shrink: 0;
}

.user-icon-btn:hover {
    background: var(--card-hover);
    transform: scale(1.05);
}

.full-width {
    width: 100%;
}

.search-icon-btn {
    background: transparent;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    color: var(--text);
    transition: transform 0.2s;
}

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