/* ============================================
   BR-Calendly — Main Stylesheet
   Modern, sleek, BusinessRocket branding
   ============================================ */

/* --- CSS Variables --- */
:root {
    --br-primary: #2563eb;
    --br-primary-light: #3b82f6;
    --br-primary-dark: #1d4ed8;
    --br-primary-50: #eff6ff;
    --br-primary-100: #dbeafe;
    --br-primary-900: #1e3a8a;

    --br-gray-50: #f8fafc;
    --br-gray-100: #f1f5f9;
    --br-gray-200: #e2e8f0;
    --br-gray-300: #cbd5e1;
    --br-gray-400: #94a3b8;
    --br-gray-500: #64748b;
    --br-gray-600: #475569;
    --br-gray-700: #334155;
    --br-gray-800: #1e293b;
    --br-gray-900: #0f172a;
    --br-gray-950: #020617;

    --br-success: #10b981;
    --br-warning: #f59e0b;
    --br-danger: #ef4444;

    --br-radius-sm: 6px;
    --br-radius: 10px;
    --br-radius-lg: 16px;
    --br-radius-xl: 24px;
    --br-radius-full: 9999px;

    --br-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --br-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --br-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --br-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --br-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);

    --br-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --br-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--br-font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--br-gray-800);
    background: var(--br-gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--br-primary); text-decoration: none; transition: color var(--br-transition); }
a:hover { color: var(--br-primary-dark); }

img { max-width: 100%; height: auto; }

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-main {
    flex: 1;
    padding: 40px 0;
}

.section { padding: 80px 0; }
.section-alt { background: white; }

.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--br-gray-900);
    margin-bottom: 12px;
    letter-spacing: -0.025em;
}
.section-header p {
    font-size: 1.125rem;
    color: var(--br-gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Header / Navbar --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--br-gray-200);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--br-gray-900) !important;
    letter-spacing: -0.02em;
}
.navbar-brand:hover { color: var(--br-gray-900) !important; }
.brand-icon { font-size: 1.5rem; }

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 8px;
}
.navbar-nav a {
    padding: 8px 14px;
    border-radius: var(--br-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--br-gray-600);
    transition: all var(--br-transition);
}
.navbar-nav a:hover {
    color: var(--br-gray-900);
    background: var(--br-gray-100);
}

.navbar-actions { display: flex; gap: 8px; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--br-radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--br-font);
    border: none;
    cursor: pointer;
    transition: all var(--br-transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-sm { padding: 7px 14px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }

.btn-primary {
    background: var(--br-primary);
    color: white;
}
.btn-primary:hover {
    background: var(--br-primary-dark);
    color: white;
    box-shadow: var(--br-shadow-md);
}

.btn-white {
    background: white;
    color: var(--br-primary-dark);
}
.btn-white:hover {
    background: var(--br-gray-50);
    color: var(--br-primary-dark);
    box-shadow: var(--br-shadow-lg);
}

.btn-ghost {
    background: transparent;
    color: var(--br-gray-600);
    border: 1px solid var(--br-gray-300);
}
.btn-ghost:hover {
    background: var(--br-gray-100);
    color: var(--br-gray-900);
}

/* --- Cards --- */
.feature-card {
    background: white;
    border: 1px solid var(--br-gray-200);
    border-radius: var(--br-radius-lg);
    padding: 32px 28px;
    text-align: center;
    transition: all var(--br-transition);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--br-shadow-lg);
    border-color: var(--br-primary-100);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--br-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 16px;
}
.feature-icon.blue { background: var(--br-primary-50); }
.feature-icon.green { background: #ecfdf5; }
.feature-icon.purple { background: #f3e8ff; }
.feature-icon.orange { background: #fff7ed; }
.feature-icon.cyan { background: #ecfeff; }
.feature-icon.pink { background: #fdf2f8; }

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--br-gray-900);
    margin-bottom: 8px;
}
.feature-card p {
    font-size: 0.875rem;
    color: var(--br-gray-500);
    line-height: 1.6;
}

/* --- Footer --- */
.site-footer {
    background: var(--br-gray-900);
    color: var(--br-gray-400);
    padding: 64px 0 32px;
    margin-top: auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-brand h3 {
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 320px;
}
.footer-col h4 {
    color: white;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
    color: var(--br-gray-400);
    font-size: 0.875rem;
    transition: color var(--br-transition);
}
.footer-col a:hover { color: white; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--br-gray-800);
    font-size: 0.8125rem;
}

/* --- Forms --- */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--br-gray-700);
    margin-bottom: 6px;
}
.form-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--br-gray-200);
    border-radius: var(--br-radius);
    font-size: 0.9375rem;
    font-family: var(--br-font);
    color: var(--br-gray-900);
    background: white;
    transition: all var(--br-transition);
    outline: none;
}
.form-input:focus {
    border-color: var(--br-primary);
    box-shadow: 0 0 0 3px var(--br-primary-100);
}
.form-input::placeholder { color: var(--br-gray-400); }

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-input { resize: vertical; min-height: 100px; }

/* --- Login Page --- */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 64px);
    padding: 40px 24px;
}
.login-card {
    background: white;
    border-radius: var(--br-radius-xl);
    padding: 48px 40px;
    box-shadow: var(--br-shadow-xl);
    width: 100%;
    max-width: 420px;
    text-align: center;
}
.login-card h1 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--br-gray-900);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}
.login-card .subtitle {
    color: var(--br-gray-500);
    font-size: 0.9375rem;
    margin-bottom: 32px;
}
.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 24px;
    background: white;
    border: 1.5px solid var(--br-gray-200);
    border-radius: var(--br-radius);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: var(--br-font);
    color: var(--br-gray-700);
    cursor: pointer;
    transition: all var(--br-transition);
}
.google-btn:hover {
    border-color: var(--br-gray-300);
    background: var(--br-gray-50);
    box-shadow: var(--br-shadow-sm);
}
.google-btn svg { width: 20px; height: 20px; }

.divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--br-gray-400);
    font-size: 0.8125rem;
}
.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--br-gray-200);
}

/* --- Booking Page --- */
.booking-container {
    max-width: 900px;
    margin: 0 auto;
}
.booking-header {
    text-align: center;
    margin-bottom: 40px;
}
.booking-header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--br-gray-900);
    letter-spacing: -0.025em;
}
.booking-header p {
    color: var(--br-gray-500);
    font-size: 1rem;
    margin-top: 8px;
}

.time-slots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    margin: 24px 0;
}
.time-slot {
    padding: 12px 16px;
    text-align: center;
    border: 1.5px solid var(--br-gray-200);
    border-radius: var(--br-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--br-transition);
    background: white;
}
.time-slot:hover {
    border-color: var(--br-primary);
    background: var(--br-primary-50);
    color: var(--br-primary-dark);
}
.time-slot.selected {
    border-color: var(--br-primary);
    background: var(--br-primary);
    color: white;
}
.time-slot.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* --- Calendar --- */
.calendar {
    background: white;
    border-radius: var(--br-radius-lg);
    box-shadow: var(--br-shadow-md);
    overflow: hidden;
    margin-bottom: 24px;
}
.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--br-gray-100);
}
.calendar-header h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--br-gray-900);
}
.calendar-nav {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--br-radius-sm);
    color: var(--br-gray-500);
    transition: all var(--br-transition);
}
.calendar-nav:hover {
    background: var(--br-gray-100);
    color: var(--br-gray-900);
}
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--br-gray-100);
}
.calendar-day-header {
    padding: 12px 8px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--br-gray-500);
    text-transform: uppercase;
    background: white;
}
.calendar-day {
    padding: 12px 8px;
    text-align: center;
    font-size: 0.875rem;
    background: white;
    cursor: pointer;
    transition: all var(--br-transition);
}
.calendar-day:hover { background: var(--br-primary-50); }
.calendar-day.today {
    font-weight: 700;
    color: var(--br-primary);
}
.calendar-day.selected {
    background: var(--br-primary);
    color: white;
    font-weight: 600;
    border-radius: 50%;
}
.calendar-day.disabled {
    color: var(--br-gray-300);
    cursor: default;
}

/* --- Admin Dashboard --- */
.admin-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: calc(100vh - 64px);
}
.admin-sidebar {
    background: white;
    border-right: 1px solid var(--br-gray-200);
    padding: 24px 0;
}
.admin-sidebar-nav { list-style: none; }
.admin-sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--br-gray-600);
    transition: all var(--br-transition);
    border-left: 3px solid transparent;
}
.admin-sidebar-nav li a:hover {
    background: var(--br-gray-50);
    color: var(--br-gray-900);
}
.admin-sidebar-nav li a.active {
    background: var(--br-primary-50);
    color: var(--br-primary);
    border-left-color: var(--br-primary);
    font-weight: 600;
}
.admin-content {
    padding: 32px;
    background: var(--br-gray-50);
}

/* --- Stats Cards --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}
.stat-card {
    background: white;
    border-radius: var(--br-radius-lg);
    padding: 24px;
    box-shadow: var(--br-shadow-sm);
    border: 1px solid var(--br-gray-100);
}
.stat-card .stat-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--br-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}
.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--br-gray-900);
    letter-spacing: -0.02em;
}

/* --- Tables --- */
.data-table {
    width: 100%;
    background: white;
    border-radius: var(--br-radius-lg);
    overflow: hidden;
    box-shadow: var(--br-shadow-sm);
    border: 1px solid var(--br-gray-100);
    border-collapse: separate;
    border-spacing: 0;
}
.data-table th {
    padding: 14px 20px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--br-gray-500);
    background: var(--br-gray-50);
    border-bottom: 1px solid var(--br-gray-200);
}
.data-table td {
    padding: 14px 20px;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--br-gray-100);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--br-gray-50); }

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--br-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-green { background: #ecfdf5; color: #059669; }
.badge-blue { background: var(--br-primary-50); color: var(--br-primary); }
.badge-yellow { background: #fffbeb; color: #d97706; }
.badge-red { background: #fef2f2; color: #dc2626; }
.badge-gray { background: var(--br-gray-100); color: var(--br-gray-600); }

/* --- Alerts --- */
.alert {
    padding: 14px 20px;
    border-radius: var(--br-radius);
    font-size: 0.875rem;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.alert-info { background: var(--br-primary-50); color: var(--br-primary-dark); border: 1px solid var(--br-primary-100); }
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.3s ease-out; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .navbar-nav { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .hero-section h1 { font-size: 2rem !important; }
    .hero-actions { flex-direction: column; align-items: center; }
    .steps-grid { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { display: none; }
    .section-header h2 { font-size: 1.75rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .time-slots { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .login-card { padding: 32px 24px; }
    .stats-grid { grid-template-columns: 1fr; }
}

/* --- Loading / Skeleton --- */
.skeleton {
    background: linear-gradient(90deg, var(--br-gray-100) 25%, var(--br-gray-200) 50%, var(--br-gray-100) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--br-radius-sm);
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--br-gray-100); }
::-webkit-scrollbar-thumb { background: var(--br-gray-300); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--br-gray-400); }

/* --- Focus visible for accessibility --- */
:focus-visible {
    outline: 2px solid var(--br-primary);
    outline-offset: 2px;
}

/* --- Selection --- */
::selection {
    background: var(--br-primary-100);
    color: var(--br-primary-900);
}