:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-success: #16a34a;
    --color-warning: #f59e0b;
    --color-danger: #dc2626;
    --color-bg: #f4f7fb;
    --color-card: #ffffff;
    --color-text: #0f172a;
    --color-text-soft: #475569;
    --color-border: #dbe3ef;
    --shadow-soft: 0 12px 35px rgba(15, 23, 42, 0.08);
    --radius-xl: 22px;
    --radius-lg: 16px;
    --radius-md: 12px;
}

html {
    font-size: 16px;
}

body {
    background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.10), transparent 22%), radial-gradient(circle at top right, rgba(22, 163, 74, 0.07), transparent 20%), linear-gradient(180deg, #f8fbff 0%, var(--color-bg) 100%);
    color: var(--color-text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.navbar {
    background: rgba(255, 255, 255, 0.88) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(219, 227, 239, 0.8);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.navbar-brand,
.nav-link {
    color: var(--color-text) !important;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.main-shell {
    min-height: calc(100vh - 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 16px 56px;
}

.auth-card,
.face-card,
.success-card {
    width: 100%;
    max-width: 980px;
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(219, 227, 239, 0.8);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.auth-card {
    max-width: 520px;
}

    .auth-card .card-body,
    .face-card .card-body,
    .success-card .card-body {
        padding: 32px;
    }

.page-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37, 99, 235, 0.10);
    color: var(--color-primary-dark);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 18px;
}

.page-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--color-text);
}

.page-subtitle {
    color: var(--color-text-soft);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 26px;
}

.form-label {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-control {
    height: 54px;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    padding: 0 16px;
    font-size: 1rem;
    box-shadow: none !important;
}

    .form-control:focus {
        border-color: rgba(37, 99, 235, 0.45);
        box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10) !important;
    }

.btn-modern {
    min-height: 52px;
    border-radius: 14px;
    padding: 0 20px;
    font-weight: 700;
    border: none;
    transition: all 0.2s ease;
}

.btn-modern-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
}

    .btn-modern-primary:hover {
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 10px 20px rgba(37, 99, 235, 0.22);
    }

.btn-modern-success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff;
}

    .btn-modern-success:hover {
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 10px 20px rgba(22, 163, 74, 0.22);
    }

.btn-modern-warning {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #1f2937;
}

    .btn-modern-warning:hover {
        color: #1f2937;
        transform: translateY(-1px);
        box-shadow: 0 10px 20px rgba(245, 158, 11, 0.22);
    }

.btn-modern-secondary {
    background: #e2e8f0;
    color: #0f172a;
}

    .btn-modern-secondary:hover {
        background: #cfd8e3;
        color: #0f172a;
    }

.alert {
    border: none;
    border-radius: 14px;
    padding: 16px 18px;
    font-weight: 500;
}

.alert-danger {
    background: rgba(220, 38, 38, 0.08);
    color: #991b1b;
}

.alert-success {
    background: rgba(22, 163, 74, 0.10);
    color: #166534;
}

.face-layout {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 26px;
}

.capture-panel,
.info-panel {
    background: #fff;
    border-radius: var(--radius-lg);
}

.video-wrapper,
.preview-wrapper {
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: #eaf0f7;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

video,
#preview {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.status-box {
    border: 1px solid var(--color-border);
    background: #f8fbff;
    border-radius: 14px;
    padding: 14px 16px;
    color: var(--color-text-soft);
    min-height: 58px;
    display: flex;
    align-items: center;
}

.helper-list {
    margin: 0;
    padding-left: 18px;
    color: var(--color-text-soft);
}

    .helper-list li {
        margin-bottom: 8px;
    }

.success-icon {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: rgba(22, 163, 74, 0.12);
    color: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    margin: 0 auto 18px;
}

.success-card {
    max-width: 560px;
    text-align: center;
}

.text-danger {
    font-size: 0.92rem;
}

.footer-modern {
    color: var(--color-text-soft);
}

@media (max-width: 900px) {
    .face-layout {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 1.7rem;
    }

    .auth-card .card-body,
    .face-card .card-body,
    .success-card .card-body {
        padding: 24px;
    }
}