:root {
    --obsidian-bg: #1d2228;
    --obsidian-card: #14171b;
    --gold-primary: #c5a059;
    --gold-light: #f3e5ab;
    --gold-dark: #9a7635;
    --gold-gradient: linear-gradient(135deg, #d4af37 0%, #aa7c11 100%);
    --purple-class: #9b51e0;
    --purple-card-bg: linear-gradient(135deg, rgba(43, 33, 56, 0.9) 0%, rgba(20, 23, 27, 0.95) 100%);
}

body {
    background-color: var(--obsidian-bg);
    background-image: radial-gradient(circle at 50% 0%, rgba(197, 160, 89, 0.08) 0%, rgba(29, 34, 40, 1) 70%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #e2e8f0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    width: 100%;
    background: linear-gradient(180deg, #1d2228 0%, #14171b 100%);
    padding: 24px 0 16px 0;
    text-align: center;
    border-bottom: 1px solid rgba(197, 160, 89, 0.3);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    margin-bottom: 2rem;
}

header h1 {
    margin: 0;
    background: linear-gradient(135deg, #f3e5ab 0%, #c5a059 50%, #9a7635 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    letter-spacing: 0.8px;
    font-size: 2rem;
}

nav {
    margin-top: 14px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-badge-btn {
    color: #e2e8f0;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(197, 160, 89, 0.2);
    border-radius: 30px;
    padding: 6px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.25s ease-in-out;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-badge-btn i {
    color: var(--gold-primary);
}

.nav-badge-btn:hover {
    background-color: rgba(197, 160, 89, 0.12);
    color: #ffffff;
    border-color: rgba(197, 160, 89, 0.5);
    transform: translateY(-1px);
}

.nav-badge-btn.active {
    background: var(--gold-gradient);
    color: #ffffff;
    border-color: var(--gold-light);
    box-shadow: 0 4px 15px rgba(197, 160, 89, 0.35);
    font-weight: 600;
}

.nav-badge-btn.active i {
    color: #ffffff;
}

.section-title {
    color: var(--gold-light);
    font-weight: 600;
    border-bottom: 1px solid rgba(197, 160, 89, 0.2);
    padding-bottom: 8px;
    letter-spacing: 0.5px;
}

.obsidian-card {
    background: rgba(20, 23, 27, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(197, 160, 89, 0.25);
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.service-card {
    border: 1px solid rgba(197, 160, 89, 0.25);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.25s ease;
    background: rgba(20, 23, 27, 0.85);
}

.service-card:hover {
    border-color: var(--gold-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(197, 160, 89, 0.2);
}

.service-card.selected {
    border-color: var(--gold-light);
    background: linear-gradient(135deg, rgba(197, 160, 89, 0.15) 0%, rgba(20, 23, 27, 0.95) 100%);
    box-shadow: 0 0 18px rgba(197, 160, 89, 0.3);
}

.class-card {
    border: 1px solid rgba(155, 81, 224, 0.35);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.25s ease;
    background: var(--purple-card-bg);
}

.class-card:hover {
    border-color: var(--purple-class);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(155, 81, 224, 0.25);
}

.class-card.selected {
    border-color: #bb86fc;
    background: linear-gradient(135deg, rgba(155, 81, 224, 0.25) 0%, rgba(20, 23, 27, 0.95) 100%);
    box-shadow: 0 0 18px rgba(155, 81, 224, 0.4);
}

.service-img {
    width: 128px;
    height: 128px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid rgba(197, 160, 89, 0.3);
    flex-shrink: 0;
}

.badge-gold {
    background: rgba(197, 160, 89, 0.15);
    color: var(--gold-light);
    border: 1px solid rgba(197, 160, 89, 0.35);
    font-weight: 600;
}

.badge-purple {
    background: rgba(155, 81, 224, 0.2);
    color: #e0b0ff;
    border: 1px solid rgba(155, 81, 224, 0.4);
    font-weight: 600;
}

/* Forms */
.form-control, .form-select {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(197, 160, 89, 0.3);
    color: #ffffff;
    border-radius: 8px;
}

.form-control:focus, .form-select:focus {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--gold-light);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(197, 160, 89, 0.25);
}

.form-select option {
    background-color: var(--obsidian-card);
    color: #ffffff;
}

.form-label {
    color: var(--gold-light);
    font-weight: 500;
}

/* 7-Day Grid Layout */
.week-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(130px, 1fr));
    gap: 0.6rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.day-column {
    background: rgba(20, 23, 27, 0.9);
    border-radius: 12px;
    border: 1px solid rgba(197, 160, 89, 0.25);
    padding: 0.75rem 0.35rem;
    min-height: 200px;
}

.day-header {
    font-weight: 600;
    font-size: 0.85rem;
    text-align: center;
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid rgba(197, 160, 89, 0.2);
    color: #e2e8f0;
}

.day-header.today {
    border-bottom: 2px solid var(--gold-light);
    color: var(--gold-light);
}

.slot-btn {
    border: 1px solid rgba(197, 160, 89, 0.4);
    color: var(--gold-light);
    background: rgba(197, 160, 89, 0.08);
    border-radius: 8px;
    padding: 0.5rem 0.25rem;
    width: 100%;
    font-size: 0.875rem;
    transition: all 0.2s;
    text-align: center;
}

.slot-btn:hover {
    background-color: rgba(197, 160, 89, 0.25);
    color: #ffffff;
    border-color: var(--gold-light);
}

.slot-btn.selected {
    background: var(--gold-gradient);
    color: #ffffff;
    border-color: var(--gold-light);
    box-shadow: 0 4px 12px rgba(197, 160, 89, 0.4);
}

.btn-gold-primary {
    background: var(--gold-gradient);
    color: #1a1f26;
    font-weight: 700;
    border: none;
    border-radius: 30px;
    padding: 10px 24px;
    box-shadow: 0 4px 14px rgba(197, 160, 89, 0.3);
    transition: all 0.25s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-gold-primary:hover {
    background: linear-gradient(135deg, #f3e5ab 0%, #d4af37 100%);
    color: #000000;
    box-shadow: 0 6px 18px rgba(197, 160, 89, 0.45);
}

.btn-gold-outline {
    border: 1px solid rgba(197, 160, 89, 0.5);
    color: var(--gold-light);
    background: transparent;
    border-radius: 30px;
    transition: all 0.2s ease;
}

.btn-gold-outline:hover {
    background: rgba(197, 160, 89, 0.15);
    color: #ffffff;
    border-color: var(--gold-light);
}

.fs-7 { font-size: 0.8rem; }
.fs-8 { font-size: 0.725rem; }