:root {
    --bg-dark: #0c0d14;
    --card-bg: #151722;
    --card-hover: #1c1f2e;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(124, 58, 237, 0.3);

    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-purple: #7c3aed;
    --accent-indigo: #6366f1;
    --accent-violet: #818cf8;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-blue: #3b82f6;

    --color-present: #10b981;
    --color-absent: #ef4444;
    --color-late: #f59e0b;
    --color-sick: #3b82f6;
    --color-valid: #a855f7;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.5;
    user-select: none;
    overflow-x: hidden;
}

/* Access Denied Screen */
.access-denied-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 9999;
}

.access-denied-card {
    background: #151722;
    border: 1px solid var(--border-glow);
    border-radius: 20px;
    padding: 36px 24px;
    text-align: center;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.access-icon {
    font-size: 52px;
    margin-bottom: 16px;
}

.access-denied-card h2 {
    font-size: 20px;
    font-weight: 700;
    color: #ef4444;
    margin-bottom: 12px;
}

.access-denied-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.access-hint {
    font-size: 12px !important;
    color: var(--text-muted) !important;
    background: rgba(255, 255, 255, 0.04);
    padding: 10px;
    border-radius: 10px;
}

/* Main App Wrapper */
.app-wrapper {
    max-width: 540px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 84px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-dark);
    position: sticky;
    top: 0;
    z-index: 50;
}

.app-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.btn-icon {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;

    &:active {
        transform: rotate(180deg);
        transition: transform 0.3s;
    }
}

/* Main Scrollable Content */
.main-content {
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Profile / Group Card */
.profile-card {
    background: linear-gradient(135deg, rgba(88, 70, 246, 0.16) 0%, rgba(21, 23, 34, 0.8) 100%);
    border: 1px solid var(--border-glow);
    border-radius: 20px;
    padding: 16px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.avatar-glow {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.45);
}

.profile-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.group-select-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.group-dropdown {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 800;
    outline: none;
    appearance: none;
    padding-right: 22px;
    cursor: pointer;
}

.group-dropdown option {
    background: #151722;
    color: #fff;
}

.dropdown-chevron {
    position: absolute;
    right: 0;
    pointer-events: none;
    color: var(--text-secondary);
}

.profile-sub {
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-gear {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Live Widget Card */
.live-widget-card {
    background: linear-gradient(135deg, rgba(30, 27, 75, 0.5) 0%, rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 20px;
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-shadow: inset 0 0 20px rgba(99, 102, 241, 0.1);
}

.live-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 700;
    color: #a5b4fc;
    letter-spacing: 1px;
}

.live-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
    animation: livePulse 1.8s infinite;
}

@keyframes livePulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.5; }
}

.live-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Section Title */
.section-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1.2px;
    margin-top: 6px;
    text-transform: uppercase;
}

/* 2-Column Actions Grid */
.actions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.grid-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    cursor: pointer;
    transition: all 0.2s;

    &:active {
        transform: scale(0.97);
        background: var(--card-hover);
        border-color: var(--border-glow);
    }
}

.grid-icon-box {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-purple { background: rgba(124, 58, 237, 0.15); color: var(--accent-violet); }
.icon-green { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.icon-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.icon-blue { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }

.grid-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.grid-card p {
    font-size: 12px;
    color: var(--text-muted);
}

/* Legend Pills */
.legend-pills {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;

    &::-webkit-scrollbar { display: none; }
}

.pill {
    font-size: 11px;
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Tab Content Visibility */
.tab-content {
    display: none;
    flex-direction: column;
    gap: 14px;
}

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

/* Students Tab Controls */
.date-bar-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 14px 16px;
}

.date-input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.date-input-group label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.modern-input {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    padding: 10px 12px;
    font-size: 14px;
    font-weight: 600;
    outline: none;

    &:focus {
        border-color: var(--accent-indigo);
    }
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
}

.search-bar input {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    color: var(--text-primary);
    padding: 12px 14px 12px 42px;
    font-size: 14px;
    outline: none;

    &:focus {
        border-color: var(--accent-indigo);
    }
}

.quick-batch-bar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.batch-buttons {
    display: flex;
    gap: 6px;

    & .chip {
        flex: 1;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        padding: 8px 0;
        border-radius: 10px;
        font-size: 12px;
        font-weight: 700;
        cursor: pointer;
        transition: transform 0.1s;

        &:active { transform: scale(0.95); }
    }
}

.chip-present { border-color: var(--color-present) !important; color: var(--color-present) !important; }
.chip-absent { border-color: var(--color-absent) !important; color: var(--color-absent) !important; }
.chip-late { border-color: var(--color-late) !important; color: var(--color-late) !important; }
.chip-sick { border-color: var(--color-sick) !important; color: var(--color-sick) !important; }
.chip-valid { border-color: var(--color-valid) !important; color: var(--color-valid) !important; }

/* Student Card & Attendance Options */
.list-meta-header {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.unsaved-badge {
    color: var(--accent-amber);
    font-weight: 600;
    animation: livePulse 1.5s infinite;
}

.students-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.student-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.student-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.student-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.student-group {
    font-size: 11px;
    background: rgba(255, 255, 255, 0.06);
    padding: 3px 8px;
    border-radius: 6px;
    color: var(--text-muted);
}

.attendance-options {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    background: rgba(0, 0, 0, 0.25);
    padding: 4px;
    border-radius: 12px;
}

.opt-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    padding: 9px 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.15s;
}

.opt-btn.active-present { background: var(--color-present); color: #fff; box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); }
.opt-btn.active-absent { background: var(--color-absent); color: #fff; box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3); }
.opt-btn.active-late { background: var(--color-late); color: #fff; box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3); }
.opt-btn.active-sick { background: var(--color-sick); color: #fff; box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3); }
.opt-btn.active-valid { background: var(--color-valid); color: #fff; box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3); }

/* Journal List */
.journal-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.journal-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;

    &:hover { border-color: var(--border-glow); }
}

/* Settings Card */
.settings-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.setting-label {
    font-size: 12px;
    color: var(--text-muted);
}

.setting-val {
    font-size: 13px;
    word-break: break-all;
    color: var(--accent-violet);
    font-family: monospace;
}

.btn-action-outline {
    background: transparent;
    border: 1px solid var(--border-glow);
    color: var(--accent-violet);
    padding: 12px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

/* Spinner */
.spinner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 0;
    gap: 10px;
    color: var(--text-muted);
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-violet);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(12, 13, 20, 0.94);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 540px;
    margin: 0 auto;
    z-index: 100;
}

.nav-item {
    background: transparent;
    border: none;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s;
}

.nav-item.active {
    color: var(--accent-violet);

    & svg {
        stroke: var(--accent-violet);
        filter: drop-shadow(0 0 6px rgba(124, 58, 237, 0.6));
    }
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(21, 23, 34, 0.95);
    color: #fff;
    padding: 12px 20px;
    border-radius: 14px;
    border: 1px solid var(--border-glow);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
    font-size: 14px;
    font-weight: 600;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast-hidden {
    opacity: 0;
    transform: translate(-50%, -20px);
    pointer-events: none;
}