:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #8b5cf6;
            --success: #10b981;
            --success-dark: #059669;
            --danger: #ef4444;
            --danger-dark: #dc2626;
            --warning: #f59e0b;
            --dark: #0f172a;
            --gray-900: #1e293b;
            --gray-800: #334155;
            --gray-700: #475569;
            --gray-600: #64748b;
            --gray-500: #94a3b8;
            --gray-400: #cbd5e1;
            --gray-300: #d1d5db;
            --gray-200: #e2e8f0;
            --gray-100: #f1f5f9;
            --gray-50: #f8fafc;
            --white: #ffffff;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            --radius: 12px;
            --radius-lg: 16px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', -apple-system, system-ui, sans-serif;
            background: linear-gradient(135deg, #f0f4ff 0%, #faf5ff 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            margin: 0;
        }

        /* ===== ANIMATED BACKGROUND ===== */
        body::before {
            content: '';
            position: fixed;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
            animation: float 20s ease-in-out infinite;
            z-index: 0;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(10px, -10px) rotate(2deg); }
            66% { transform: translate(-10px, 10px) rotate(-2deg); }
        }

        /* ===== LOGIN CARD ===== */
        .login-card {
            position: relative;
            z-index: 1;
            background: var(--white);
            padding: 48px 40px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            width: 100%;
            max-width: 420px;
            border: 1px solid rgba(99, 102, 241, 0.08);
            animation: slideUp 0.6s ease forwards;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px) scale(0.96);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        /* ===== HEADER ===== */
        .login-header {
            text-align: center;
            margin-bottom: 32px;
        }

        .login-header .logo-icon {
            width: 72px;
            height: 72px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 36px;
            color: var(--white);
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
            transition: var(--transition);
        }

        .login-header .logo-icon:hover {
            transform: scale(1.05) rotate(-5deg);
        }

        .login-header h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }

        .login-header p {
            color: var(--gray-500);
            font-size: 14px;
            margin-top: 4px;
            font-weight: 500;
        }

        /* ===== ALERTAS ===== */
        .alert {
            padding: 14px 18px;
            border-radius: var(--radius);
            font-size: 14px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            animation: slideIn 0.4s ease;
            border-left: 4px solid;
        }

        .alert i {
            font-size: 18px;
        }

        .alert-success {
            background: linear-gradient(135deg, #d1fae5, #a7f3d0);
            color: #065f46;
            border-left-color: var(--success);
        }

        .alert-error {
            background: linear-gradient(135deg, #fee2e2, #fecaca);
            color: #991b1b;
            border-left-color: var(--danger);
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateX(-20px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* ===== FORM ===== */
        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--gray-700);
            font-size: 13px;
            letter-spacing: 0.3px;
        }

        .form-group label i {
            color: var(--primary);
            margin-right: 6px;
            width: 16px;
        }

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

        .input-wrapper {
            position: relative;
        }

        .input-wrapper .input-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray-400);
            font-size: 16px;
            transition: var(--transition);
        }

        .input-wrapper:focus-within .input-icon {
            color: var(--primary);
        }

        .input-main {
            width: 100%;
            padding: 12px 16px 12px 44px;
            border: 2px solid var(--gray-200);
            border-radius: 10px;
            font-family: 'Inter', sans-serif;
            font-size: 15px;
            color: var(--gray-900);
            transition: var(--transition);
            background: var(--white);
            outline: none;
        }

        .input-main:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
        }

        .input-main:hover {
            border-color: var(--gray-400);
        }

        .input-main::placeholder {
            color: var(--gray-400);
        }

        .input-main.input-password {
            padding-right: 44px;
        }

        /* ===== PHONE INPUT - SIN LADA ===== */
        .phone-input-container .input-wrapper {
            width: 100%;
        }

        .phone-input-container .input-wrapper .input-main {
            padding-left: 44px;
        }

        /* ===== TOGGLE PASSWORD ===== */
        .toggle-password {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--gray-400);
            cursor: pointer;
            font-size: 18px;
            transition: var(--transition);
            padding: 4px;
        }

        .toggle-password:hover {
            color: var(--gray-600);
        }

        /* ===== BUTTON ===== */
        .btn-submit {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 10px;
            font-family: 'Inter', sans-serif;
            font-size: 16px;
            font-weight: 700;
            color: var(--white);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-top: 8px;
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
        }

        .btn-submit:active {
            transform: translateY(0);
        }

        .btn-submit i {
            font-size: 18px;
        }

        .btn-submit.loading {
            pointer-events: none;
            opacity: 0.8;
        }

        .btn-submit.loading i {
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        /* ===== FOOTER ===== */
        .login-footer {
            text-align: center;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--gray-100);
        }

        .login-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .login-footer a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        .login-footer .divider {
            color: var(--gray-300);
            margin: 0 8px;
        }

        .login-footer .footer-text {
            color: var(--gray-500);
            font-size: 13px;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 480px) {
            .login-card { padding: 32px 24px; }
            .login-header h2 { font-size: 24px; }
            .input-main { font-size: 14px; padding: 10px 14px 10px 40px; }
            .btn-submit { font-size: 15px; padding: 12px; }
            .login-header .logo-icon { width: 60px; height: 60px; font-size: 28px; }
        }

        @media (max-width: 380px) {
            .login-card { padding: 24px 16px; }
            .login-header .logo-icon { width: 52px; height: 52px; font-size: 24px; }
        }

        /* ===== ANIMACIONES ADICIONALES ===== */
        .form-group {
            animation: fadeInUp 0.5s ease forwards;
            opacity: 0;
        }

        .form-group:nth-child(1) { animation-delay: 0.1s; }
        .form-group:nth-child(2) { animation-delay: 0.2s; }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== SCROLLBAR ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--gray-100); }
        ::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--primary); }

        /* ===== CHECKBOX "RECORDARME" ===== */
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: -8px;
            margin-bottom: 20px;
        }

        .form-options .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--gray-600);
            cursor: pointer;
        }

        .form-options .remember-me input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--primary);
            cursor: pointer;
        }

        .form-options .forgot-password {
            font-size: 13px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .form-options .forgot-password:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }