:root {
    --primary-color: #ff6b35;
    --primary-dark: #d9541c;
    --bg-dark: #0f0f0f;
    --bg-darker: #1a1a1a;
    --card-bg: #222222;
    --text-light: #e0e0e0;
    --text-muted: #888888;
    --grade-green: #4caf50;
    --grade-pink: #e471dc;
    --grade-blue: #2196f3;
    --grade-yellow: #fce832;
    --grade-orange: #ff9800;
    --grade-brown: #7d3e21;
    --grade-red: #f44336;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bg-darker {
    background-color: var(--bg-darker) !important;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-radius: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.15);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.badge {
    font-size: 0.85rem;
    padding: 0.5rem 0.8rem;
    font-weight: 500;
}

.grade-badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

.grade-green { background-color: rgba(76, 175, 80, 0.2); color: var(--grade-green); }
.grade-pink { background-color: rgba(228, 113, 220, 0.2); color: var(--grade-pink); }
.grade-blue { background-color: rgba(33, 150, 243, 0.2); color: var(--grade-blue); }
.grade-yellow { background-color: rgba(252, 232, 50, 0.2); color: var(--grade-yellow); }
.grade-orange { background-color: rgba(255, 152, 0, 0.2); color: var(--grade-orange); }
.grade-brown { background-color: rgba(125, 62, 33, 0.2); color: var(--grade-brown); }
.grade-red { background-color: rgba(244, 67, 54, 0.2); color: var(--grade-red); }

.stars-display {
    font-size: 1.2rem;
    color: var(--grade-yellow);
}

.navbar-dark {
    background-color: var(--bg-darker) !important;
}

.form-control, .form-select {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 107, 53, 0.2);
    color: var(--text-light);
}

.form-control:focus, .form-select:focus {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
    color: var(--text-light);
    box-shadow: 0 0 0 0.2rem rgba(255, 107, 53, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.problem-card {
    position: relative;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--grade-orange));
}

.problem-item {
    padding: 1.5rem;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 1rem;
    background-color: var(--card-bg);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.problem-item:hover {
    border-left-color: var(--grade-orange);
    background-color: rgba(255, 107, 53, 0.05);
}

.grade-v0 { border-left-color: var(--grade-green); }
.grade-v1 { border-left-color: var(--grade-pink); }
.grade-v2 { border-left-color: var(--grade-yellow); }
.grade-v3 { border-left-color: var(--grade-blue); }
.grade-v4 { border-left-color: var(--grade-orange); }
.grade-v5 { border-left-color: var(--grade-brown); }
.grade-v6 { border-left-color: var(--grade-red); }
.grade-v7 { border-left-color: var(--grade-red); }
.grade-v8 { border-left-color: var(--grade-red); }
.grade-v9 { border-left-color: var(--grade-red); }
.grade-v10 { border-left-color: var(--grade-red); }

.stat-box {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 152, 0, 0.05));
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.star-rating {
    display: flex;
    gap: 0.5rem;
    font-size: 2rem;
    cursor: pointer;
}

.star-rating .star {
    color: var(--text-muted);
    transition: color 0.2s;
}

.star-rating .star:hover,
.star-rating .star.active {
    color: var(--grade-yellow);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.modal-content {
    background-color: var(--card-bg);
    border-color: rgba(255, 107, 53, 0.2);
}

.modal-header {
    border-bottom-color: rgba(255, 107, 53, 0.2);
}

.modal-footer {
    border-top-color: rgba(255, 107, 53, 0.2);
}

.btn-close {
    filter: invert(1);
}

.table {
    color: var(--text-light);
}

.table th {
    border-bottom-color: rgba(255, 107, 53, 0.2);
    color: var(--primary-color);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.table-hover tbody tr:hover {
    background-color: rgba(255, 107, 53, 0.1);
}

.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--grade-orange));
    font-weight: 700;
    font-size: 1.1rem;
}

.rank-1 { background: linear-gradient(135deg, #ffd700, #ffed4e); color: #000; }
.rank-2 { background: linear-gradient(135deg, #c0c0c0, #e8e8e8); color: #000; }
.rank-3 { background: linear-gradient(135deg, #cd7f32, #e8a76a); color: #fff; }

@media (max-width: 768px) {
    .stat-number {
        font-size: 2rem;
    }

    .problem-item {
        padding: 1rem;
    }
}

.hold-color-picker {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.hold-color-option {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s;
}

.hold-color-option:hover,
.hold-color-option.active {
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.color-red { background-color: #e74c3c; }
.color-blue { background-color: #3498db; }
.color-green { background-color: #2ecc71; }
.color-yellow { background-color: #f1c40f; }
.color-purple { background-color: #9b59b6; }
.color-pink { background-color: #e91e63; }
.color-orange { background-color: #e67e22; }
.color-black { background-color: #2c3e50; }
.color-white { background-color: #ecf0f1; border-color: #bdc3c7; }
.color-gray { background-color: #95a5a6; }

/* LINE Login Button */
.btn-success {
    background-color: #00b900;
    border-color: #00b900;
}

.btn-success:hover {
    background-color: #009500;
    border-color: #009500;
}

.fab.fa-line {
    font-size: 1.1rem;
}

/* ===== Wall Navigation Bar ===== */
.wall-nav {
    background: var(--bg-darker);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-radius: 12px;
    /* NO overflow:hidden — lets current-pill scale/shadow show */
}

/* Row 1: Route Pills — block+text-align is the most reliable centering method */
.wall-nav-pills-row {
    display: block;
    text-align: center;
    padding: 0.7rem 0.85rem;
    line-height: 2.5rem;   /* vertical rhythm between wrapped lines */
}

/* Row 2: Wall Switcher */
.wall-nav-switcher-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.85rem;
    border-top: 1px solid rgba(255, 107, 53, 0.12);
    border-radius: 0 0 12px 12px;   /* match container corners */
    gap: 0.5rem;
    min-height: 2.4rem;
}

.wall-nav-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-align: center;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* invisible spacer — mirrors the wall-switch-btn on other side so title stays centered */
.wall-switch-placeholder {
    display: inline-flex;
    min-width: 4.5rem;
    visibility: hidden;
    pointer-events: none;
}

/* Route Number Pills — inline-block so text-align:center works on parent */
.wall-nav-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.8rem;
    height: 1.7rem;
    padding: 0 0.4rem;
    border-radius: 5px;
    font-size: 0.74rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.07);
    color: var(--text-muted) !important;
    text-decoration: none !important;
    border: 1.5px solid transparent;
    transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.15s;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    margin: 0.12rem;
    vertical-align: middle;
}

.wall-nav-pill:hover {
    background: rgba(255, 107, 53, 0.2) !important;
    color: var(--primary-color) !important;
    border-color: rgba(255, 107, 53, 0.45);
    transform: translateY(-1px);
    text-decoration: none !important;
}

/* Current route */
.wall-nav-pill.wall-nav-current {
    background: var(--primary-color) !important;
    color: #fff !important;
    font-weight: 800;
    cursor: default;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.5);
    border-color: rgba(255,255,255,0.3) !important;
}

/* Wall Switch Buttons */
.wall-switch-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.65rem;
    border-radius: 7px;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.35);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.18s, border-color 0.18s, transform 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
    min-width: 4.5rem;          /* same width as placeholder to keep title centered */
    justify-content: center;
}

.wall-switch-btn:hover {
    background: rgba(255, 107, 53, 0.25);
    border-color: var(--primary-color);
    color: #fff;
    transform: translateY(-1px);
    text-decoration: none;
}

.wall-switch-arrow {
    font-size: 0.65rem;
    opacity: 0.85;
}

.wall-switch-label {
    letter-spacing: 0.01em;
}