/* =====================================================================
   TwoFar — Core Design System
   Minimal, modern, premium. Solid colors only. No gradients. No blur.
   ===================================================================== */

:root {
    --color-bg: #FAFAFA;
    --color-card: #FFFFFF;
    --color-primary: #222222;
    --color-accent: #5C6AC4;
    --color-success: #34A853;
    --color-danger: #EA4335;
    --color-border: #E5E7EB;
    --color-text: #1F2937;
    --color-text-muted: #6B7280;

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 48px;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: 'Inter', sans-serif;
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    color: var(--color-primary);
    font-weight: 600;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Layout shells ---- */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3);
    background-color: var(--color-bg);
}

/* ---- Card ---- */
.tf-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--space-4);
}

.tf-card-sm {
    border-radius: var(--radius-md);
    padding: var(--space-3);
}

/* ---- Buttons ---- */
.btn-tf-primary {
    background-color: var(--color-primary);
    border: none;
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    border-radius: var(--radius-sm);
    padding: 14px 28px;
    font-size: 1rem;
    transition: opacity 0.15s ease;
}
.btn-tf-primary:hover { opacity: 0.85; color: #fff; }

.btn-tf-accent {
    background-color: var(--color-accent);
    border: none;
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    border-radius: var(--radius-sm);
    padding: 14px 28px;
    font-size: 1rem;
    transition: opacity 0.15s ease;
}
.btn-tf-accent:hover { opacity: 0.85; color: #fff; }

.btn-tf-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-primary);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    border-radius: var(--radius-sm);
    padding: 13px 27px;
}
.btn-tf-outline:hover { background-color: var(--color-bg); color: var(--color-primary); }

.btn-tf-danger {
    background-color: var(--color-danger);
    border: none;
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    border-radius: var(--radius-sm);
    padding: 14px 28px;
}

/* ---- Forms ---- */
.tf-input {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    width: 100%;
    background-color: #fff;
}
.tf-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(92, 106, 196, 0.12);
}

.tf-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: 6px;
    display: block;
}

/* ---- Navbar ---- */
.tf-navbar {
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-3);
}

.tf-navbar .brand {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-primary);
}

/* ---- Badges ---- */
.tf-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
}
.tf-badge-accent { background-color: rgba(92, 106, 196, 0.12); color: var(--color-accent); }
.tf-badge-success { background-color: rgba(52, 168, 83, 0.12); color: var(--color-success); }
.tf-badge-danger { background-color: rgba(234, 67, 53, 0.12); color: var(--color-danger); }

/* ---- Alerts ---- */
.tf-alert {
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 0.95rem;
    border: 1px solid transparent;
    margin-bottom: var(--space-2);
}
.tf-alert-danger { background-color: rgba(234, 67, 53, 0.08); border-color: rgba(234, 67, 53, 0.2); color: var(--color-danger); }
.tf-alert-success { background-color: rgba(52, 168, 83, 0.08); border-color: rgba(52, 168, 83, 0.2); color: var(--color-success); }

/* ---- Utility ---- */
.text-muted-tf { color: var(--color-text-muted); }
.tf-divider { height: 1px; background-color: var(--color-border); border: none; margin: var(--space-3) 0; }

@media (max-width: 576px) {
    .tf-card { padding: var(--space-3); border-radius: var(--radius-md); }
}