body.dark-mode {
            --bg: #f9fafb;
            --card-bg: #ffffff;
            --text: #1f2937;
            --text-light: #6b7280;
        }
        body {
            font-family: 'Nunito', sans-serif;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .login-card {
            background: var(--card-bg, white);
            border-radius: 24px;
            padding: 40px;
            max-width: 400px;
            width: 100%;
            text-align: center;
            box-shadow: 0 20px 60px rgba(0,0,0,0.2);
        }
        .logo {
            font-size: 64px;
            margin-bottom: 10px;
        }
        h1 {
            font-size: 28px;
            color: var(--text);
            margin-bottom: 10px;
        }
        .subtitle {
            color: var(--text-light);
            margin-bottom: 30px;
            font-size: 16px;
        }
        .btn {
            display: flex;
            gap: 12px;
            width: 100%;
            border-radius: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .btn-google {
            background: white;
            border: 2px solid #e5e7eb;
            color: var(--text);
        }
        .btn-google:hover {
            background: #f9fafb;
            border-color: #d1d5db;
        }
        .btn-google img {
            width: 20px;
            height: 20px;
        }
        .btn-apple {
            background: #000000;
            border: 2px solid #000000;
            color: #ffffff;
        }
        .btn-apple:hover {
            background: #1a1a1a;
            border-color: #1a1a1a;
        }
        .btn-apple svg {
            width: 20px;
            height: 20px;
        }
        .btn-email {
            background: #e5e7eb;
            border: none;
            color: var(--text);
        }
        .btn-email:hover {
            background: #d1d5db;
        }
        .divider {
            display: flex;
            align-items: center;
            gap: 15px;
            margin: 20px 0;
            color: var(--text-light);
            font-size: 14px;
        }
        .divider::before, .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #e5e7eb;
        }
        .email-form {
            display: none;
        }
        .email-form.active {
            display: block;
        }
        .email-form input {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 16px;
            margin-bottom: 12px;
            background: var(--bg);
        }
        .email-form input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .back-link {
            display: inline-block;
            margin-top: 20px;
            color: var(--text-light);
            text-decoration: none;
            font-size: 14px;
        }
        .back-link:hover {
            color: var(--primary);
        }
        .error-message {
            background: #fee2e2;
            color: #dc2626;
            padding: 12px;
            border-radius: 8px;
            margin-bottom: 15px;
            font-size: 14px;
            display: none;
        }
        .error-message.show {
            display: block;
        }
        .success-message {
            background: #dcfce7;
            color: #16a34a;
            padding: 12px;
            border-radius: 8px;
            margin-bottom: 15px;
            font-size: 14px;
            display: none;
        }
        .success-message.show {
            display: block;
        }
        .forgot-password-link {
            display: inline-block;
            margin-top: 4px;
            margin-bottom: 8px;
            color: var(--primary);
            text-decoration: none;
            font-size: 14px;
            cursor: pointer;
        }
        .forgot-password-link:hover {
            text-decoration: underline;
            color: var(--primary-dark);
        }
        .reset-form {
            display: none;
            margin-top: 12px;
        }
        .reset-form.active {
            display: block;
        }
        .reset-form input {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 16px;
            margin-bottom: 12px;
            background: var(--bg);
        }
        .reset-form input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .btn-reset {
            background: var(--primary);
            border: none;
            color: white;
        }
        .btn-reset:hover {
            background: var(--primary-dark);
        }
        .btn-cancel {
            background: white;
            border: 2px solid #e5e7eb;
            color: var(--text);
        }
        .btn-cancel:hover {
            background: #f9fafb;
        }
        .loading {
            display: none;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 20px;
            color: var(--text-light);
        }
        .loading.show {
            display: flex;
        }
        .spinner {
            width: 24px;
            height: 24px;
            border: 3px solid #e5e7eb;
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        .profile-list {
            margin-top: 20px;
            text-align: left;
        }
        .profile-list h3 {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .profile-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            background: var(--bg);
            border-radius: 10px;
            margin-bottom: 8px;
            cursor: pointer;
            transition: all 0.2s;
        }
        .profile-item:hover {
            background: #e5e7eb;
        }
        .profile-name {
            font-weight: 600;
            color: var(--text);
        }
        .profile-arrow {
            color: var(--text-light);
        }
        .user-info {
            display: none;
            align-items: center;
            gap: 12px;
            padding: 15px;
            background: var(--bg);
            border-radius: 12px;
            margin-bottom: 20px;
        }
        .user-info.show {
            display: flex;
        }
        .user-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: white;
        }
        .user-avatar img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
        }
        .user-details {
            text-align: left;
        }
        .user-name {
            font-weight: 600;
            color: var(--text);
        }
        .user-email {
            font-size: 15px;
            color: var(--text-light);
        }
        .btn-signout {
            background: #fee2e2;
            border: none;
            color: #dc2626;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            cursor: pointer;
            margin-left: auto;
        }

/* ========== DARK MODE ========== */
body.dark-mode {
    background: linear-gradient(135deg, #1a3a00, #0f2600);
}
body.dark-mode .login-card {
    background: #1a2a1a;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
body.dark-mode h1 {
    color: #e5e5e5;
}
body.dark-mode .subtitle {
    color: #a3a3a3;
}
body.dark-mode .btn-google {
    background: #2a3a2a;
    border-color: #3a4f3a;
    color: #e5e5e5;
}
body.dark-mode .btn-google:hover {
    background: #3a4f3a;
    border-color: #4a6a4a;
}
body.dark-mode .divider {
    color: #a3a3a3;
}
body.dark-mode .divider::before,
body.dark-mode .divider::after {
    background: #3a4f3a;
}
body.dark-mode .email-form input,
body.dark-mode .reset-form input {
    background: #0f1a0f;
    border-color: #3a4f3a;
    color: #e5e5e5;
}
body.dark-mode .email-form input:focus,
body.dark-mode .reset-form input:focus {
    border-color: var(--primary);
}
body.dark-mode .error-message {
    background: #3b1111;
    color: #fca5a5;
}
body.dark-mode .success-message {
    background: #0f3d1a;
    color: #86efac;
}
body.dark-mode .profile-item {
    background: #0f1a0f;
}
body.dark-mode .profile-item:hover {
    background: #3a4f3a;
}
body.dark-mode .profile-name {
    color: #e5e5e5;
}
body.dark-mode .user-info {
    background: #0f1a0f;
}
body.dark-mode .user-name {
    color: #e5e5e5;
}
body.dark-mode .btn-cancel {
    background: #2a3a2a;
    border-color: #3a4f3a;
    color: #e5e5e5;
}
body.dark-mode .btn-email {
    background: #2a3a2a;
    color: #c5c5c5;
}
body.dark-mode .btn-email:hover {
    background: #3a4f3a;
}
body.dark-mode .back-link {
    color: #a3a3a3;
}

@media (max-width: 400px) {
    .login-card { padding: 24px 16px; border-radius: 18px; }
    .user-info { flex-wrap: wrap; gap: 8px; }
}