/* ================================
   LOGIN PAGE – MODERN DARK THEME
   ================================ */

/* Nếu muốn an toàn, có thể đổi thành body.login-page {...} */
body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #e5e7eb;
    background:
        radial-gradient(circle at top left, rgba(225,27,34,0.25), transparent 60%),
        radial-gradient(circle at bottom right, rgba(56,189,248,0.20), transparent 60%),
        #0f172a;
}

/* Wrapper tổng */
.login-wrapper {
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: center;
}

/* Card chính */
.login-card {
    width: 100%;
    max-width: 380px;
    background: rgba(15, 23, 42, 0.92);
    border-radius: 20px;
    padding: 28px 26px;
    backdrop-filter: blur(12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(148, 163, 184, 0.35);
}

/* ================================
   HEADER
   ================================ */

.login-header {
    text-align: center;
    margin-bottom: 20px;
}

.login-header h2 {
    margin: 0 0 6px;
    font-size: 1.4rem;
    color: #ffffff;
}

.login-header p {
    margin: 0;
    font-size: 0.9rem;
    color: #cbd5e1;
}

/* ================================
   ERROR BOX
   ================================ */

.login-error {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 14px;
    padding: 10px 12px;

    font-size: 0.85rem;
    color: #fecaca;
    background: rgba(127, 29, 29, 0.85);
    border-radius: 10px;
    border: 1px solid #7f1d1d;
}

/* ================================
   FORM & INPUT
   ================================ */

.login-form .form-group {
    margin-bottom: 14px;
}

.login-form label {
    display: block;
    margin-bottom: 6px;

    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #9ca3af;
}

/* Group icon + input */
.input-group {
    display: flex;
    align-items: center;
    padding: 8px 10px;

    background: #020617;
    border-radius: 12px;
    border: 1px solid #334155;
    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        background-color 0.2s ease;
}

.input-group i {
    margin-right: 8px;
    font-size: 0.9rem;
    color: #9ca3af;
}

.input-group input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;

    font-size: 0.9rem;
    color: #e2e8f0;
}

.input-group input::placeholder {
    color: #6b7280;
}

/* Focus rõ ràng, hỗ trợ cả tab */
.input-group:focus-within {
    border-color: #e11b22;
    box-shadow: 0 0 0 2px rgba(225, 27, 34, 0.3);
    background-color: #020617;
}

/* ================================
   BUTTON
   ================================ */

.btn-login {
    width: 100%;
    margin-top: 8px;
    padding: 10px 14px;

    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 6px;

    border-radius: 999px;
    border: 1px solid #f87171;
    cursor: pointer;

    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
    background: linear-gradient(135deg, #e11b22, #b91c1c);

    box-shadow: 0 10px 24px rgba(248, 113, 113, 0.45);
    transition:
        background 0.25s ease,
        transform 0.15s ease,
        box-shadow 0.15s ease;
}

.btn-login:hover {
    background: linear-gradient(135deg, #b91c1c, #7f1d1d);
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(248, 113, 113, 0.55);
}

/* Focus cho accessibility */
.btn-login:focus-visible {
    outline: 2px solid #f97373;
    outline-offset: 2px;
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: 0 8px 18px rgba(185, 28, 28, 0.7);
}

/* ================================
   BOTTOM TEXT
   ================================ */

.login-bottom {
    margin-top: 14px;
    text-align: center;
    font-size: 0.85rem;
    color: #cbd5e1;
}

.login-bottom a {
    color: #38bdf8;
    text-decoration: none;
    font-weight: 500;
}

.login-bottom a:hover {
    text-decoration: underline;
}

/* Demo account box */
.login-demo-box {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    background: rgba(15,23,42,0.85);
    border: 1px dashed rgba(148,163,184,0.5);
    color: #e5e7eb;
    display: grid;
    gap: 8px;
}

.login-demo-box__title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    color: #f97373;
}

.login-demo-box__item {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 6px 10px;
    align-items: center;
    font-size: 0.85rem;
}

.login-demo-box__creds {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-demo-box__item code {
    display: inline-block;
    padding: 6px 8px;
    border-radius: 8px;
    background: #0b1222;
    border: 1px solid #1f2937;
    color: #cbd5e1;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.8rem;
    width: 100%;
}

/* ================================
   RESPONSIVE
   ================================ */

@media (max-width: 480px) {
    .login-card {
        padding: 24px 18px;
        border-radius: 18px;
    }

    .login-header h2 {
        font-size: 1.25rem;
    }
}