:root {
    --barber-black: #0A0A0A;
    --barber-red: #E53935;
    --barber-blue: #1E88E5;
    --barber-white: #FFFFFF;
    --barber-ink: #171717;
    --barber-muted: #6c757d;
    --barber-border: #e8eaee;
    --barber-bg: #f5f7fb;
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    background: var(--barber-bg);
    color: var(--barber-ink);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-shell {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 24px;
    background: var(--barber-black);
    color: var(--barber-white);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: inherit;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--barber-red), var(--barber-blue));
    color: var(--barber-white);
    font-weight: 800;
}

.brand small,
.user-card span,
.eyebrow {
    display: block;
    color: #99a1ad;
    font-size: .82rem;
}

.sidebar-nav {
    gap: 6px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    border-radius: 8px;
    color: #d9dce2;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
    background: rgba(255, 255, 255, .08);
    color: var(--barber-white);
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--barber-blue);
}

.sidebar-nav .nav-link.active .nav-dot {
    background: var(--barber-red);
}

.sidebar-footer {
    display: grid;
    gap: 14px;
    margin-top: auto;
}

.user-card {
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 8px;
}

.main-content {
    min-width: 0;
    padding: 28px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.topbar h1,
.section-heading h2 {
    margin: 0;
}

.status-pill {
    padding: 8px 12px;
    border-radius: 999px;
    background: #e8f5ec;
    color: #157347;
    font-weight: 700;
    font-size: .86rem;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.metric-card,
.content-panel {
    border: 1px solid var(--barber-border);
    border-radius: 8px;
    background: var(--barber-white);
    box-shadow: 0 12px 30px rgba(10, 10, 10, .06);
}

.metric-card {
    padding: 20px;
}

.metric-card span {
    color: var(--barber-muted);
    font-size: .9rem;
}

.metric-card strong {
    display: block;
    margin-top: 8px;
    font-size: 2rem;
}

.metric-card.accent {
    border-color: rgba(229, 57, 53, .25);
}

.content-panel {
    padding: 22px;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
}

.btn-primary {
    --bs-btn-bg: var(--barber-red);
    --bs-btn-border-color: var(--barber-red);
    --bs-btn-hover-bg: #c62828;
    --bs-btn-hover-border-color: #c62828;
}

.btn-outline-primary {
    --bs-btn-color: var(--barber-blue);
    --bs-btn-border-color: var(--barber-blue);
    --bs-btn-hover-bg: var(--barber-blue);
    --bs-btn-hover-border-color: var(--barber-blue);
}

.form-control,
.form-select,
.modal-content,
.alert {
    border-radius: 8px;
}

.table {
    --bs-table-bg: transparent;
}

.table thead th {
    color: var(--barber-muted);
    font-size: .82rem;
    text-transform: uppercase;
}

.calendar-layout,
.whatsapp-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 20px;
}

#calendar {
    min-height: 680px;
}

.fc .fc-button-primary {
    background: var(--barber-black);
    border-color: var(--barber-black);
}

.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:hover {
    background: var(--barber-red);
    border-color: var(--barber-red);
}

.log-message {
    max-width: 520px;
    white-space: normal;
}

.auth-body {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 24px;
    background:
        linear-gradient(135deg, rgba(10, 10, 10, .9), rgba(10, 10, 10, .82)),
        radial-gradient(circle at 20% 20%, rgba(229, 57, 53, .35), transparent 28%),
        radial-gradient(circle at 80% 70%, rgba(30, 136, 229, .28), transparent 30%),
        var(--barber-black);
}

.public-body {
    min-height: 100vh;
    background:
        linear-gradient(135deg, rgba(10, 10, 10, .94), rgba(10, 10, 10, .82)),
        var(--barber-black);
}

.public-shell {
    width: min(100% - 32px, 960px);
    margin: 0 auto;
    padding: 28px 0;
}

.public-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    color: var(--barber-white);
}

.booking-card {
    padding: clamp(22px, 4vw, 42px);
    border-radius: 8px;
    background: var(--barber-white);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .32);
}

.booking-card h1 {
    margin-bottom: 10px;
    font-size: clamp(2rem, 5vw, 4rem);
}

.booking-summary {
    display: inline-grid;
    gap: 6px;
    min-width: min(100%, 360px);
    padding: 18px;
    border: 1px solid var(--barber-border);
    border-radius: 8px;
}

.booking-summary span {
    color: var(--barber-muted);
}

.auth-card {
    width: min(100%, 440px);
    padding: 28px;
    border-radius: 8px;
    background: var(--barber-white);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .28);
}

.auth-brand {
    margin-bottom: 26px;
    color: var(--barber-black);
}

@media (max-width: 1100px) {
    .metric-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .calendar-layout,
    .whatsapp-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
        padding: 18px;
    }

    .sidebar-nav {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .main-content {
        padding: 18px;
    }

    .topbar,
    .section-heading {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 560px) {
    .metric-grid,
    .sidebar-nav {
        grid-template-columns: 1fr;
    }

    .content-panel {
        padding: 16px;
    }
}