/* Tket application stylesheet — base layout, typography, components */
:root {
    --tk-bg: #ffffff;
    --tk-fg: #0f172a;
    --tk-muted: #64748b;
    --tk-border: #e2e8f0;
    --tk-primary: #0ea5e9;
    --tk-primary-dark: #0284c7;
    --tk-accent: #f59e0b;
    --tk-success: #16a34a;
    --tk-danger: #dc2626;
    --tk-card: #ffffff;
    --tk-shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --tk-radius: 12px;
    --tk-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--tk-font);
    color: var(--tk-fg);
    background: #f8fafc;
    line-height: 1.5;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--tk-card);
    border-bottom: 1px solid var(--tk-border);
    box-shadow: var(--tk-shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.brand a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--tk-fg);
    font-weight: 700;
    font-size: 1.25rem;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--tk-primary);
    color: white;
    font-weight: 800;
}

.topnav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.topnav a {
    color: var(--tk-muted);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    transition: all 0.15s ease;
}

.topnav a:hover {
    color: var(--tk-fg);
    background: #f1f5f9;
}

.view {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.splash {
    text-align: center;
    padding: 4rem 0;
    color: var(--tk-muted);
}

.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--tk-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--tk-border);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    border: none;
    background: var(--tk-primary);
    color: white;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn:hover { background: var(--tk-primary-dark); }
.btn-secondary { background: var(--tk-card); color: var(--tk-fg); border: 1px solid var(--tk-border); }
.btn-secondary:hover { background: #f1f5f9; }
.btn-danger { background: var(--tk-danger); }
.btn-success { background: var(--tk-success); }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards */
.card {
    background: var(--tk-card);
    border: 1px solid var(--tk-border);
    border-radius: var(--tk-radius);
    padding: 1.5rem;
    box-shadow: var(--tk-shadow);
}

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.375rem; font-weight: 500; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--tk-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border 0.15s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--tk-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

/* Grids */
.grid { display: grid; gap: 1.5rem; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 768px) {
    .grid-cols-2, .grid-cols-3 { grid-template-columns: 1fr; }
}

/* Event cards */
.event-card {
    background: var(--tk-card);
    border: 1px solid var(--tk-border);
    border-radius: var(--tk-radius);
    padding: 1.5rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}
.event-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(15,23,42,0.1); }
.event-card h3 { margin: 0 0 0.5rem 0; }
.event-card .meta { color: var(--tk-muted); font-size: 0.875rem; margin-bottom: 0.5rem; }
.event-card .price { font-weight: 700; color: var(--tk-primary); }

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }

/* Scanner */
.scanner-video {
    width: 100%;
    max-width: 640px;
    border-radius: var(--tk-radius);
    background: #000;
}

/* Toasts */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: #1e293b;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--tk-shadow);
    z-index: 100;
    font-weight: 500;
}
.toast-error { background: var(--tk-danger); }
.toast-success { background: var(--tk-success); }

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--tk-border);
    margin-bottom: 1.5rem;
}
.tabs button {
    background: none;
    border: none;
    padding: 0.625rem 1rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--tk-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.tabs button.active {
    color: var(--tk-primary);
    border-bottom-color: var(--tk-primary);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}
.table th, .table td {
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--tk-border);
}
.table th { font-weight: 600; background: #f8fafc; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--tk-muted); }

/* PayNow polling UI */
.paynow-status {
    text-align: center;
    padding: 2rem;
}
.paynow-status .icon { font-size: 3rem; margin-bottom: 1rem; }

/* Hidden helper */
.hidden { display: none !important; }

/* Required field marker */
.required { color: var(--tk-danger); }

/* Modal overlay + dialog */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 4rem 1rem 2rem;
    z-index: 200;
    animation: fadeIn 0.15s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
    background: var(--tk-card);
    border: 1px solid var(--tk-border);
    border-radius: var(--tk-radius);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
    width: 100%;
    max-width: 560px;
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
    animation: slideUp 0.2s ease;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--tk-border);
}
.modal-header h2 {
    margin: 0;
    font-size: 1.125rem;
}
.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--tk-muted);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    transition: background 0.15s ease;
}
.modal-close:hover { background: #f1f5f9; color: var(--tk-fg); }

.modal form { padding: 1.5rem; margin: 0; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--tk-border);
    margin-top: 1.5rem;
}

/* Two-column form row */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
@media (max-width: 480px) {
    .form-row { grid-template-columns: 1fr; }
}