:root {
    --bg-dark: #121212;
    --card-bg: #1e1e1e;
    --card-border: #333333;
    --gold-primary: #d4af37;
    --gold-light: #f3e5ab;
    --gold-hover: #c5a028;
    --text-light: #f0f0f0;
    --text-muted: #aaaaaa;
    --accent-red: #e74c3c;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    padding-bottom: 50px;
}

/* Header */
.app-header {
    text-align: center;
    padding: 40px 20px 25px;
    background: linear-gradient(180deg, #1f1a0e 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--card-border);
}

.app-header h1 {
    font-size: 2.5rem;
    color: var(--gold-primary);
    letter-spacing: 2px;
    margin-bottom: 5px;
    text-transform: uppercase;
}

.app-header p {
    color: var(--gold-light);
    font-size: 1.1rem;
    font-weight: 300;
}

.main-container {
    max-width: 900px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Tabs */
.tab-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.tab-btn {
    flex: 1;
    padding: 14px 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    border-color: var(--gold-primary);
    color: var(--text-light);
}

.tab-btn.active {
    background: var(--gold-primary);
    color: #000;
    border-color: var(--gold-primary);
}

/* Section Cards */
.section-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 25px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid #2a2a2a;
}

.section-title {
    font-size: 1.25rem;
    color: var(--gold-light);
    font-weight: 600;
}

.limit-badge {
    background: #2a220d;
    color: var(--gold-primary);
    border: 1px solid var(--gold-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Base Option Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
}

.option-card {
    background: #252525;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-card:hover {
    border-color: #666;
}

.option-card.selected {
    border-color: var(--gold-primary);
    background: #2d2613;
}

.option-card h3 {
    color: var(--gold-primary);
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.option-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Add-Ins Checkboxes */
.full-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #252525;
    border: 1px solid var(--card-border);
    padding: 12px 15px;
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: border-color 0.2s;
}

.checkbox-option:hover {
    border-color: var(--gold-primary);
}

.checkbox-option input[type="checkbox"] {
    accent-color: var(--gold-primary);
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Summary Box */
#box-summary p {
    background: #181818;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 8px;
    border-left: 3px solid var(--gold-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 24px;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn-primary {
    background: var(--gold-primary);
    color: #000;
}

.btn-primary:hover {
    background: var(--gold-hover);
}

.btn-primary:disabled {
    background: #555;
    color: #888;
    cursor: not-allowed;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
    padding: 20px;
}

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

.modal-card {
    background: var(--card-bg);
    border: 1px solid var(--gold-primary);
    border-radius: 12px;
    padding: 30px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
}

#checkout-modal input {
    box-sizing: border-box;
    font-size: 0.95rem;
    outline: none;
}

#checkout-modal input:focus {
    border-color: var(--gold-primary) !important;
}

#card-container {
    border: 1px solid #444;
    border-radius: 6px;
    padding: 10px;
    background: #222;
}