:root {
    --login-bg: #f0f2f5;
    --login-card-bg: #ffffff;
    --login-left-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --login-text-light: #ffffff;
    --login-text-dark: #1a1a2e;
    --login-input-bg: #f8f9fa;
    --login-input-border: #dee2e6;
    --login-input-focus: #0d6efd;
    --login-btn-bg: linear-gradient(135deg, #0f3460, #16213e);
    --login-btn-hover: linear-gradient(135deg, #16213e, #1a1a2e);
    --login-shadow: rgba(0, 0, 0, 0.1);
    --login-divider: #dee2e6;
}

[data-bs-theme="dark"] {
    --login-bg: #0f0f1a;
    --login-card-bg: #1a1a2e;
    --login-left-bg: #f0f0f0;
    --login-text-light: #1a1a2e;
    --login-text-dark: #e0e0e0;
    --login-input-bg: #252542;
    --login-input-border: #2d2d4a;
    --login-input-focus: #4d6bfe;
    --login-btn-bg: linear-gradient(135deg, #4d6bfe, #6c63ff);
    --login-btn-hover: linear-gradient(135deg, #6c63ff, #4d6bfe);
    --login-shadow: rgba(0, 0, 0, 0.4);
    --login-divider: #2d2d4a;
}

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

html, body {
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--login-bg);
    transition: background 0.3s ease, color 0.3s ease;
}

.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.login-container {
    display: flex;
    width: 100%;
    max-width: 900px;
    min-height: 560px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px var(--login-shadow);
    background: var(--login-card-bg);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.login-left {
    flex: 1;
    background: var(--login-left-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.login-left::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.03);
    top: -80px;
    right: -80px;
}

.login-left::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.03);
    bottom: -60px;
    left: -60px;
}

.login-left-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.login-logo {
    width: 140px;
    height: auto;
    margin-bottom: 1.5rem;
}

.login-logo-light {
    display: none;
}

[data-bs-theme="dark"] .login-logo {
    display: block;
}

[data-bs-theme="dark"] .login-logo-light {
    display: none;
}

[data-bs-theme="light"] .login-logo {
    display: none;
}

[data-bs-theme="light"] .login-logo-light {
    display: block;
}

.login-title {
    color: var(--login-text-light);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--login-text-light);
    opacity: 0.7;
    font-size: 1rem;
}

.login-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2.5rem;
    position: relative;
}

.theme-toggle {
    position: absolute;
    top: 1.2rem;
    right: 1.5rem;
    z-index: 2;
}

.theme-toggle .btn {
    font-size: 0.85rem;
    padding: 0.3rem 0.9rem;
    border-color: var(--login-divider);
    color: var(--login-text-dark);
    background: transparent;
    transition: all 0.3s ease;
}

.theme-toggle .btn:hover {
    background: var(--login-input-bg);
    border-color: var(--login-input-focus);
    color: var(--login-input-focus);
}

.login-form-wrap {
    max-width: 360px;
    margin: 0 auto;
    width: 100%;
}

.form-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--login-text-dark);
    margin-bottom: 1.8rem;
    text-align: center;
}

.form-label {
    font-weight: 500;
    color: var(--login-text-dark);
    font-size: 0.9rem;
}

.input-group-text {
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    color: var(--login-text-dark);
    transition: border-color 0.3s ease, background 0.3s ease;
}

.form-control {
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    color: var(--login-text-dark);
    padding: 0.6rem 0.8rem;
    font-size: 0.95rem;
    transition: border-color 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.form-control:focus {
    background: var(--login-input-bg);
    border-color: var(--login-input-focus);
    box-shadow: 0 0 0 0.2rem rgba(77, 107, 254, 0.15);
    color: var(--login-text-dark);
}

.form-control::placeholder {
    color: #999;
    opacity: 0.7;
}

.input-group .btn-outline-secondary {
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    color: var(--login-text-dark);
    transition: all 0.3s ease;
}

.input-group .btn-outline-secondary:hover {
    background: var(--login-input-border);
    border-color: var(--login-input-focus);
    color: var(--login-input-focus);
}

.btn-login {
    background: var(--login-btn-bg);
    border: none;
    color: #fff;
    padding: 0.7rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 10px;
    margin-top: 0.8rem;
    transition: all 0.3s ease;
}

.btn-login:hover {
    background: var(--login-btn-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(77, 107, 254, 0.3);
}

.btn-login:disabled {
    opacity: 0.7;
    transform: none;
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .login-container {
        flex-direction: column;
        max-width: 420px;
        min-height: auto;
    }

    .login-left {
        padding: 2rem 1.5rem;
        min-height: 200px;
    }

    .login-left::before,
    .login-left::after {
        display: none;
    }

    .login-logo {
        width: 110px;
        margin-bottom: 0.8rem;
    }

    .login-title {
        font-size: 1.5rem;
    }

    .login-subtitle {
        font-size: 0.9rem;
    }

    .login-right {
        padding: 2rem 1.5rem;
    }

    .login-form-wrap {
        max-width: 100%;
    }

    .theme-toggle {
        top: 0.8rem;
        right: 1rem;
    }

    .form-title {
        font-size: 1.3rem;
        margin-bottom: 1.2rem;
    }
}

@media (max-width: 480px) {
    .login-wrapper {
        padding: 0.5rem;
    }

    .login-container {
        border-radius: 15px;
    }

    .login-left {
        padding: 1.5rem 1rem;
        min-height: 160px;
    }

    .login-logo {
        width: 90px;
    }

    .login-title {
        font-size: 1.3rem;
    }

    .login-right {
        padding: 1.5rem 1rem;
    }

    .form-title {
        font-size: 1.1rem;
    }

    .form-control {
        font-size: 0.9rem;
        padding: 0.5rem 0.7rem;
    }

    .btn-login {
        padding: 0.6rem;
        font-size: 0.95rem;
    }
}

/* --- SweetAlert2 theme overrides --- */
.swal2-popup {
    border-radius: 16px;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

[data-bs-theme="dark"] .swal2-popup {
    background: var(--login-card-bg);
    color: var(--login-text-dark);
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}

[data-bs-theme="dark"] .swal2-title {
    color: var(--login-text-dark);
}

[data-bs-theme="dark"] .swal2-html-container {
    color: var(--login-text-dark);
    opacity: 0.85;
}

[data-bs-theme="dark"] .swal2-confirm {
    background: var(--login-btn-bg) !important;
    border: none !important;
    border-radius: 10px !important;
    font-weight: 600 !important;
    padding: 0.6rem 2rem !important;
}

[data-bs-theme="dark"] .swal2-confirm:hover {
    background: var(--login-btn-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(77, 107, 254, 0.3);
}

.swal2-confirm {
    border-radius: 10px !important;
    font-weight: 600 !important;
    padding: 0.6rem 2rem !important;
}

@media (min-width: 769px) and (max-width: 1024px) {
    .login-container {
        max-width: 750px;
    }

    .login-left {
        padding: 2rem;
    }

    .login-right {
        padding: 2rem;
    }

    .login-form-wrap {
        max-width: 320px;
    }
}