.auth-page-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
    position: relative;
}

.auth-back-home {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    z-index: 100;
}

.auth-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.08),
        0 2px 8px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-top: 3px solid var(--primary-green);
    transition: var(--transition-smooth);
    max-width: 440px;
    width: 100%;
    text-align: center;
    position: relative;
    overflow: hidden;
    animation: authSlideUp 0.6s ease-out;
}

@keyframes authSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-main);
}

.auth-card:hover {
    transform: translateY(-4px);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.12),
        0 8px 24px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border-color: rgba(78, 205, 196, 0.4);
}

.auth-logo {
    width: 90px;
    height: 90px;
    background: var(--gradient-main);
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-calligraphy);
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-dark);
    box-shadow:
        0 6px 20px rgba(78, 205, 196, 0.35),
        inset 0 2px 4px rgba(255, 255, 255, 0.3);
    transition: var(--transition-smooth);
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow:
            0 6px 20px rgba(78, 205, 196, 0.35),
            inset 0 2px 4px rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.03);
        box-shadow:
            0 8px 30px rgba(78, 205, 196, 0.45),
            inset 0 2px 4px rgba(255, 255, 255, 0.4);
    }
}

.auth-logo:hover {
    transform: scale(1.08) rotate(3deg);
    box-shadow:
        0 10px 40px rgba(78, 205, 196, 0.5),
        inset 0 2px 4px rgba(255, 255, 255, 0.4);
}

.auth-title {
    font-family: var(--font-fangsong);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.auth-subtitle {
    font-family: var(--font-fangsong);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.auth-form {
    text-align: left;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-family: var(--font-fangsong);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.5px;
}

.form-label .required {
    color: var(--danger-color);
    margin-left: 2px;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: var(--font-fangsong);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    transition: var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 4px rgba(78, 205, 196, 0.15);
    background: rgba(255, 255, 255, 1);
    transform: translateY(-1px);
}

.form-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.form-input.is-invalid {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 4px rgba(244, 67, 54, 0.1);
}

.form-input.is-valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
}

.form-text {
    display: block;
    font-family: var(--font-fangsong);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.invalid-feedback {
    display: none;
    font-family: var(--font-fangsong);
    font-size: var(--font-size-xs);
    color: var(--danger-color);
    margin-top: var(--spacing-xs);
    font-weight: 500;
}

.form-input.is-invalid + .form-text + .invalid-feedback {
    display: block;
}

.password-input-wrapper {
    position: relative;
}

.password-input-wrapper .form-input {
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
    font-size: var(--font-size-base);
}

.toggle-password:hover {
    background-color: rgba(78, 205, 196, 0.15);
    color: var(--primary-green-dark);
}

.toggle-password:focus {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

.verification-wrapper {
    display: flex;
    gap: var(--spacing-sm);
}

.verification-wrapper .form-input {
    flex: 1;
}

.btn-send-code {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-soft);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: var(--font-fangsong);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
    min-width: 120px;
}

.btn-send-code:hover:not(:disabled) {
    background: var(--gradient-main);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

.btn-send-code:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-options {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.remember-me input[type="checkbox"] {
    accent-color: var(--primary-green);
    cursor: pointer;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-xs);
}

.remember-me label {
    font-family: var(--font-fangsong);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    margin: 0;
}

.btn-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-main);
    color: var(--text-dark);
    border: none;
    border-radius: var(--radius-xl);
    font-family: var(--font-fangsong);
    font-size: var(--font-size-lg);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.35);
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.btn-submit:hover::before {
    left: 100%;
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(78, 205, 196, 0.45);
}

.btn-submit:active {
    transform: translateY(-1px);
}

.auth-links {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.auth-links a {
    font-family: var(--font-fangsong);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.auth-links a:hover {
    color: var(--primary-green-dark);
    background-color: rgba(78, 205, 196, 0.1);
    transform: translateY(-2px);
}

.auth-flash-messages {
    margin-bottom: var(--spacing-lg);
}

.auth-flash-message {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-fangsong);
    font-weight: 500;
    backdrop-filter: blur(var(--backdrop-blur));
    animation: flashFadeIn 0.4s ease-out;
    border-left: 4px solid;
}

@keyframes flashFadeIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.auth-flash-message.success {
    background: rgba(76, 175, 80, 0.15);
    color: #1b5e20;
    border-left-color: var(--success-color);
}

.auth-flash-message.error {
    background: rgba(244, 67, 54, 0.15);
    color: #b71c1c;
    border-left-color: var(--danger-color);
}

.auth-flash-message.warning {
    background: rgba(255, 152, 0, 0.15);
    color: #e65100;
    border-left-color: var(--warning-color);
}

.auth-flash-message.info {
    background: rgba(33, 150, 243, 0.15);
    color: #0d47a1;
    border-left-color: var(--info-color);
}

@media (max-width: 768px) {
    .auth-page-wrapper {
        padding: var(--spacing-lg);
    }

    .auth-back-home {
        position: static;
        margin-bottom: var(--spacing-lg);
        text-align: center;
    }

    .auth-card {
        padding: var(--spacing-xl);
        max-width: 100%;
    }

    .auth-logo {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }

    .auth-title {
        font-size: var(--font-size-xl);
    }

    .auth-subtitle {
        font-size: var(--font-size-sm);
    }

    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .auth-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .auth-page-wrapper {
        padding: var(--spacing-md);
    }

    .auth-card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-xl);
    }

    .auth-logo {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }

    .form-input {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .verification-wrapper {
        flex-direction: column;
    }

    .btn-send-code {
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .btn-submit {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }

    .auth-links a {
        font-size: var(--font-size-xs);
    }
}

@media (prefers-contrast: high) {
    .auth-card {
        border: 2px solid var(--text-primary);
        box-shadow: 0 0 0 4px var(--text-dark);
    }

    .form-input {
        border-width: 3px;
    }

    .auth-links a {
        text-decoration: underline;
    }
}