/* =========================
   AUTH PAGE STYLES
========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --text: #475569;
    --bg: #f1f5f9;
    --white: #ffffff;
    --border: #e2e8f0;
}

body {
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    background: linear-gradient(135deg, #eff6ff, #f8fafc);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    padding: 20px;
}

/* =========================
   AUTH CONTAINER
========================= */
.auth-container {
    width: 100%;
    max-width: 440px;
}

/* =========================
   AUTH LOGO
========================= */
.auth-logo {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.auth-logo p {
    font-size: 14px;
    color: var(--text);
    margin-top: 6px;
}

/* =========================
   FORM
========================= */
form {
    background: var(--white);
    padding: 45px 40px;
    border-radius: 18px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    animation: fadeUp 0.6s ease;
}

form h2 {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 35px;
    letter-spacing: -0.5px;
}

/* =========================
   INPUT GROUP
========================= */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--secondary);
    margin-bottom: 6px;
}

form input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 10px;
    border: 1.5px solid var(--border);
    font-size: 15px;
    transition: all 0.3s;
    font-family: "Inter", sans-serif;
    color: var(--secondary);
}

form input::placeholder {
    color: #94a3b8;
}

form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* =========================
   BUTTON
========================= */
.btn-primary {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: var(--primary);
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 5px;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

/* =========================
   TEXT & LINKS
========================= */
.auth-text {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
}

.auth-text a {
    color: var(--primary);
    font-weight: 500;
    transition: 0.2s;
    text-decoration: none;
}

.auth-text a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

/* =========================
   DEMO CREDENTIALS
========================= */
.demo-credentials {
    background: #f8fafc;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    border: 1px solid var(--border);
}

.demo-credentials h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 12px;
    text-align: center;
}

.demo-account {
    margin-bottom: 12px;
    padding: 12px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.demo-account:last-child {
    margin-bottom: 0;
}

.demo-account p {
    font-size: 13px;
    margin-bottom: 4px;
    color: var(--text);
}

.demo-account strong {
    color: var(--secondary);
    font-weight: 600;
}

.demo-account code {
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--primary);
    font-family: "Consolas", monospace;
}

/* =========================
   DEMO LOGIN BUTTONS
========================= */
.demo-login-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.demo-btn {
    padding: 12px 20px;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--white);
    color: var(--text);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: "Inter", sans-serif;
}

.demo-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.demo-btn-student {
    border-color: var(--primary);
    color: var(--primary);
}

.demo-btn-student:hover {
    background: var(--primary);
    color: var(--white);
}

.demo-btn-mentor {
    border-color: #059669;
    color: #059669;
}

.demo-btn-mentor:hover {
    background: #059669;
    color: var(--white);
}

/* =========================
   MESSAGES
========================= */
.auth-error,
.auth-success {
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 18px;
    text-align: center;
}

.auth-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.auth-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* =========================
   ANIMATION
========================= */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 480px) {
    form {
        padding: 35px 25px;
    }

    form h2 {
        font-size: 24px;
    }

    .auth-logo h1 {
        font-size: 28px;
    }
}