/* ===== Expense Tracker Authentication Pages ===== */

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --background: #f5f7fb;
    --surface: #ffffff;
    --text: #172033;
    --muted: #64748b;
    --border: #e2e8f0;
    --danger: #dc2626;
    --success: #15803d;
    --radius: 16px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: Inter, "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, #e0e7ff 0, transparent 38%),
        radial-gradient(circle at bottom right, #dbeafe 0, transparent 35%),
        var(--background);
}

.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 36px;
    background: var(--surface);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.09);
}

.auth-container h1 {
    margin-bottom: 12px;
    font-size: clamp(26px, 5vw, 32px);
    font-weight: 750;
    letter-spacing: -0.8px;
    line-height: 1.2;
}

.auth-container > p {
    margin-bottom: 24px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.7;
}

.auth-container form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-container label {
    margin-top: 8px;
    color: var(--text);
    font-size: 13px;
    font-weight: 650;
}

.auth-container input {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
    background: #fff;
    color: var(--text);
    font: inherit;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.auth-container input::placeholder {
    color: #94a3b8;
}

.auth-container input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.auth-container button {
    width: 100%;
    min-height: 48px;
    margin-top: 12px;
    padding: 12px 16px;
    border: none;
    border-radius: 9px;
    background: var(--primary);
    color: #fff;
    font: inherit;
    font-size: 14px;
    font-weight: 650;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.auth-container button:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.auth-container button:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.auth-container a {
    display: inline-block;
    margin-top: 18px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

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

.auth-container #message {
    margin: 14px 0 0;
    font-size: 13px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.auth-container #message:empty {
    display: none;
}

/* Keyboard accessibility */
.auth-container button:focus-visible,
.auth-container a:focus-visible {
    outline: 3px solid rgba(79, 70, 229, 0.35);
    outline-offset: 3px;
}

/* Mobile layout */
@media (max-width: 480px) {
    body {
        padding: 16px;
    }

    .auth-container {
        padding: 26px 22px;
        border-radius: 12px;
    }
}