:root {
    --navy-950: #0a1220;
    --navy-900: #0f1c30;
    --navy-800: #16273f;
    --navy-700: #1f3553;
    --ocean-400: #38bdf8;
    --ocean-500: #0ea5e9;
    --ocean-600: #0284c7;
    --text-light: #e8eef5;
    --text-muted: #93a6bf;
    --border: rgba(255, 255, 255, 0.08);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.1);
    --danger-border: rgba(248, 113, 113, 0.3);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ── Auth pages (login / register) ─────────────────────────────────────── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top left, var(--navy-800), var(--navy-950) 60%);
    color: var(--text-light);
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px 36px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
}

.auth-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--ocean-400);
    margin-bottom: 16px;
}

.trial-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--ocean-400);
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 999px;
    padding: 5px 12px;
    margin-bottom: 14px;
}

.auth-card h1 {
    font-size: 26px;
    margin: 0 0 8px;
}

.auth-subtitle {
    color: var(--text-muted);
    margin: 0 0 28px;
    font-size: 15px;
    line-height: 1.5;
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row .form-group {
    flex: 1;
    min-width: 0;
}

.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-light);
}

label .optional {
    font-weight: 400;
    color: var(--text-muted);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"] {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--navy-950);
    color: var(--text-light);
    font-size: 15px;
}

input::placeholder { color: var(--text-muted); }

input:focus {
    outline: none;
    border-color: var(--ocean-400);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 22px;
}

.checkbox-row input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--ocean-500);
}

.checkbox-row label {
    margin: 0;
    font-weight: 400;
    font-size: 14px;
    color: var(--text-muted);
}

.btn-primary {
    width: 100%;
    padding: 13px;
    border-radius: 8px;
    border: none;
    background: linear-gradient(135deg, var(--ocean-500), var(--ocean-600));
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.15s ease;
}

.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:active { filter: brightness(0.95); }

.field-error {
    color: var(--danger);
    font-size: 13px;
    margin-top: 6px;
}

.alert-error {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 22px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--ocean-400);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover { text-decoration: underline; }

@media (max-width: 480px) {
    .auth-card { padding: 28px 22px; }
    .form-row { flex-direction: column; gap: 0; }
}