:root {
    --sfs-primary: #4f46e5;
    --sfs-primary-dark: #3730a3;
    --sfs-accent: #06b6d4;
    --sfs-bg: #f4f5fb;
    --sfs-surface: #ffffff;
    --sfs-text: #1f2333;
    --sfs-muted: #6b7280;
    --sfs-border: #e5e7eb;
    --sfs-radius: 14px;
}

body {
    background: var(--sfs-bg);
    color: var(--sfs-text);
    font-family: "Lato", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
}

.sfs-navbar {
    background: linear-gradient(135deg, var(--sfs-primary) 0%, var(--sfs-primary-dark) 100%);
    box-shadow: 0 2px 12px rgba(79, 70, 229, 0.25);
}

.sfs-navbar .navbar-brand {
    font-weight: 700;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sfs-navbar .nav-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85) !important;
    transition: color 0.15s ease;
}

.sfs-navbar .nav-link:hover {
    color: #ffffff !important;
}

.sfs-page {
    padding-top: 2.5rem;
    padding-bottom: 3rem;
}

.sfs-card {
    background: var(--sfs-surface);
    border: 1px solid var(--sfs-border);
    border-radius: var(--sfs-radius);
    box-shadow: 0 8px 30px rgba(31, 35, 51, 0.06);
    padding: 2rem;
}

.sfs-card-title {
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.sfs-auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #ffffff 0%, #eef0fb 100%);
    padding: 1.5rem;
}

.sfs-auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--sfs-surface);
    border-radius: var(--sfs-radius);
    box-shadow: 0 20px 50px rgba(31, 35, 51, 0.25);
    overflow: hidden;
}

.sfs-auth-card .card-header {
    background: linear-gradient(135deg, var(--sfs-primary) 0%, var(--sfs-primary-dark) 100%);
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-align: center;
    padding: 1.25rem;
    border: none;
}

.sfs-auth-card .card-body {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.sfs-auth-card .card-footer {
    background: transparent;
    border: none;
    padding: 0 1.75rem 1.75rem;
}

.dropzone {
    border: 2px dashed var(--sfs-primary) !important;
    border-radius: var(--sfs-radius) !important;
    background: rgba(79, 70, 229, 0.03);
    min-height: 180px !important;
    margin: 0 0 1.5rem 0 !important;
}

.sfs-result-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
    word-break: break-all;
}

.sfs-stats-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.sfs-table {
    background: var(--sfs-surface);
    border-radius: var(--sfs-radius);
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(31, 35, 51, 0.06);
}

.sfs-table thead {
    background: var(--sfs-bg);
}

.sfs-table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sfs-muted);
    border-bottom-width: 1px !important;
}

.sfs-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--sfs-muted);
}

.btn-primary {
    background: var(--sfs-primary);
    border-color: var(--sfs-primary);
}

.btn-primary:hover, .btn-primary:focus {
    background: var(--sfs-primary-dark);
    border-color: var(--sfs-primary-dark);
}

.custom-select:focus, .form-control:focus {
    border-color: var(--sfs-primary);
    box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.15);
}