/* --- BIẾN MÀU SẮC (Theme Cheese) --- */
:root {
    --bg-cream: #FCF5EF;
    --brown-dark: #4B3022;
    --brown-light: #8D6E63;
    --gold: #FFD700;
    --white: #ffffff;
    --shadow-soft: 0 10px 30px rgba(75, 48, 34, 0.15);
    --shadow-hover: 0 15px 35px rgba(75, 48, 34, 0.25);
}

body {
    background-color: var(--bg-cream);
    font-family: 'Kanit', sans-serif;
    min-height: 100vh;
}

/* Container căn giữa màn hình */
.auth-container {
    min-height: 85vh; /* Trừ đi header/footer */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* --- CARD STYLE --- */
.auth-card {
    background: var(--white);
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-soft);
    padding: 40px;
    width: 100%;
    max-width: 500px; /* Độ rộng tối đa cho Login */
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    /* Animation xuất hiện */
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    transform: translateY(30px);
}

    /* Riêng cho Register form rộng hơn chút */
    .auth-card.register-mode {
        max-width: 700px;
    }

    .auth-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-hover);
    }

    /* Trang trí góc (Vệt màu) */
    .auth-card::before {
        content: '';
        position: absolute;
        top: -50px;
        left: -50px;
        width: 150px;
        height: 150px;
        background: var(--gold);
        border-radius: 50%;
        opacity: 0.1;
        z-index: 0;
    }

    .auth-card::after {
        content: '';
        position: absolute;
        bottom: -30px;
        right: -30px;
        width: 100px;
        height: 100px;
        background: var(--brown-dark);
        border-radius: 50%;
        opacity: 0.05;
        z-index: 0;
    }

/* Nội dung bên trong card */
.auth-content {
    position: relative;
    z-index: 1;
}

/* --- TYPOGRAPHY --- */
.auth-title {
    font-family: 'Pacifico', cursive;
    color: var(--brown-dark);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 30px;
    text-shadow: 2px 2px 0px rgba(0,0,0,0.05);
}

.auth-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* --- FORM ELEMENTS --- */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-label {
    font-weight: 500;
    color: var(--brown-dark);
    margin-left: 15px;
    margin-bottom: 8px;
    display: block;
    font-size: 0.95rem;
}

/* Input có icon bên trong */
.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 1.1rem;
    transition: 0.3s;
}

.form-control {
    width: 100%;
    padding: 12px 20px 12px 50px; /* Padding trái lớn để né icon */
    border-radius: 50px;
    border: 2px solid #eee;
    background-color: #fcfcfc;
    font-size: 1rem;
    color: var(--brown-dark);
    transition: all 0.3s ease;
    font-family: 'Kanit';
}

    .form-control:focus {
        background-color: #fff;
        border-color: var(--gold);
        box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.15);
        outline: none;
    }

        .form-control:focus + .input-icon {
            color: var(--brown-dark); /* Icon đổi màu khi focus */
        }

    .form-control::placeholder {
        color: #ccc;
        font-size: 0.9rem;
    }

/* Validation Error */
.text-danger {
    font-size: 0.8rem;
    color: #ff6b81;
    margin-left: 15px;
    margin-top: 5px;
    display: block;
}

/* --- BUTTONS --- */
.btn-auth {
    width: 100%;
    padding: 14px;
    border-radius: 50px;
    border: none;
    background-color: var(--brown-dark);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(75, 48, 34, 0.2);
    margin-top: 10px;
}

    .btn-auth:hover {
        background-color: var(--brown-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(75, 48, 34, 0.3);
        color: #fff;
    }

/* --- LINKS --- */
.auth-footer {
    text-align: center;
    margin-top: 25px;
    font-size: 0.95rem;
    color: #666;
}

.auth-link {
    color: var(--brown-light);
    font-weight: 600;
    text-decoration: none;
    transition: 0.3s;
    position: relative;
}

    .auth-link:hover {
        color: var(--brown-dark);
    }

    .auth-link::after {
        content: '';
        position: absolute;
        width: 0%;
        height: 2px;
        bottom: -2px;
        left: 0;
        background-color: var(--gold);
        transition: width 0.3s;
    }

    .auth-link:hover::after {
        width: 100%;
    }

/* --- ANIMATION KEYFRAMES --- */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .auth-card {
        padding: 30px 20px;
    }

    .auth-title {
        font-size: 2rem;
    }
}