:root {
            --edu-blue: #1A3F7A;
            --sma-teal: #0E9AA7;
            --ra-gold: #D4A843;
            --charcoal: #1E293B;
            --slate: #475569;
            --silver: #94A3B8;
            --cloud: #F1F5F9;
            --white: #FFFFFF;
            --danger: #EF4444;
            --success: #10B981;

            --bg-gradient: linear-gradient(135deg, var(--edu-blue) 0%, var(--sma-teal) 100%);
            --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.08);
            --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.1);
            --shadow-glow: 0 0 0 4px rgba(26,63,122,0.12);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
        }

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

        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background: var(--cloud);
            color: var(--charcoal);
            min-height: 100vh;
            display: flex;
            overflow: hidden;
        }

        /* ============ SPLIT LAYOUT ============ */
        .login-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* LEFT SIDE - Image */
        .login-left {
            flex: 1;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--edu-blue);
        }

        .login-left-bg {
            position: absolute;
            inset: 0;
            background:
                url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?w=1200&q=80') center/cover no-repeat;
            opacity: 0.3;
            transition: transform 20s ease-in-out;
        }

        .login-left:hover .login-left-bg {
            transform: scale(1.05);
        }

        .login-left-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(
                135deg,
                rgba(26,63,122,0.92) 0%,
                rgba(14,154,167,0.85) 100%
            );
        }

        .login-left-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
            padding: 40px;
            max-width: 500px;
        }

        .left-logo {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
        }

        .left-title {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

        .left-tagline {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 32px;
            line-height: 1.6;
        }

        .left-features {
            display: flex;
            flex-direction: column;
            gap: 14px;
            text-align: left;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            font-weight: 500;
            opacity: 0.9;
        }

        .feature-icon {
            width: 36px;
            height: 36px;
            background: rgba(255,255,255,0.15);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* RIGHT SIDE - Form */
        .login-right {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px;
            background: var(--white);
            position: relative;
        }

        .login-form-container {
            width: 100%;
            max-width: 420px;
            animation: fadeInUp 0.6s ease-out;
        }

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .form-header {
            margin-bottom: 32px;
        }

        .form-header h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--edu-blue);
            margin-bottom: 6px;
        }

        .form-header p {
            font-size: 13px;
            color: var(--slate);
        }

        /* Form Fields */
        .form-group {
            margin-bottom: 18px;
        }

        .form-label {
            display: block;
            font-size: 12px;
            font-weight: 600;
            color: var(--charcoal);
            margin-bottom: 6px;
        }

        .input-wrapper {
            position: relative;
        }

        .input-wrapper .icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 14px;
            color: var(--silver);
            transition: var(--transition);
            pointer-events: none;
        }

        .form-input {
            width: 100%;
            height: 48px;
            padding: 0 14px 0 42px;
            border: 2px solid var(--cloud);
            border-radius: var(--radius-md);
            font-family: inherit;
            font-size: 14px;
            color: var(--charcoal);
            background: var(--cloud);
            transition: var(--transition);
            outline: none;
        }

        .form-input:focus {
            border-color: var(--edu-blue);
            background: var(--white);
            box-shadow: var(--shadow-glow);
        }

        .form-input:focus + i,
        .form-input:focus ~ i {
            color: var(--edu-blue);
        }

        .form-input.error {
            border-color: var(--danger);
            box-shadow: 0 0 0 4px rgba(239,68,68,0.1);
        }

        .toggle-password {
            position: absolute;
            right: 5px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--silver);
            cursor: pointer;
            font-size: 14px;
            padding: 4px;
            transition: var(--transition);
            pointer-events: all;
        }
        .toggle-password i { 
            position: absolute;
            right: 3px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 14px;
            color: var(--silver);
            transition: var(--transition);
        }
        .toggle-password:hover { color: var(--edu-blue); }

        .field-error {
            font-size: 11px;
            color: var(--danger);
            margin-top: 4px;
            display: none;
            align-items: center;
            gap: 4px;
        }

        .field-error.visible { display: flex; }

        /* CAPTCHA */
        .captcha-wrapper {
            display: flex;
            gap: 10px;
            align-items: flex-end;
        }

        .captcha-display {
            flex: 1;
            height: 48px;
            background: var(--charcoal);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            user-select: none;
        }

        .captcha-text {
            font-family: 'Courier New', monospace;
            font-size: 19px;
            font-weight: 800;
            color: var(--ra-gold);
            letter-spacing: 6px;
            position: relative;
            z-index: 2;
            text-shadow: 2px 2px 0 rgba(0,0,0,0.3);
        }

        /* Noise lines for anti-bot */
        .captcha-noise {
            position: absolute;
            inset: 0;
            z-index: 1;
            opacity: 0.3;
        }

        .captcha-refresh {
            width: 48px;
            height: 48px;
            border: 2px solid var(--cloud);
            border-radius: var(--radius-md);
            background: var(--white);
            color: var(--slate);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .captcha-refresh:hover {
            border-color: var(--edu-blue);
            color: var(--edu-blue);
            transform: rotate(180deg);
        }

        .captcha-input {
            flex: 1;
        }

        /* Remember & Forgot */
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }

        .checkbox-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }

        .checkbox-wrapper input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--edu-blue);
            cursor: pointer;
        }

        .checkbox-wrapper span {
            font-size: 12px;
            color: var(--slate);
            font-weight: 500;
        }

        .forgot-link {
            font-size: 12px;
            color: var(--edu-blue);
            font-weight: 600;
            transition: var(--transition);
        }

        .forgot-link:hover { color: var(--sma-teal); }

        /* Submit Button */
        .btn-login {
            width: 100%;
            height: 50px;
            background: var(--bg-gradient);
            color: white;
            border: none;
            border-radius: var(--radius-md);
            font-family: inherit;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(26,63,122,0.3);
            position: relative;
            overflow: hidden;
        }

        .btn-login:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26,63,122,0.4);
        }

        .btn-login:active:not(:disabled) {
            transform: translateY(0);
        }

        .btn-login:disabled {
            opacity: 0.7;
            cursor: not-allowed;
        }

        /* Spinner inside button */
        .btn-spinner {
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,0.3);
            border-top-color: white;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
            display: none;
        }

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

        .btn-login.loading .btn-text { display: none; }
        .btn-login.loading .btn-spinner { display: block; }
        .btn-login.loading .btn-icon { display: none; }

        /* Footer */
        .form-footer {
            margin-top: 24px;
            text-align: center;
            font-size: 11px;
            color: var(--silver);
        }

        .form-footer a {
            color: var(--edu-blue);
            font-weight: 600;
        }

        /* Lockout Banner */
        .lockout-banner {
            background: #FEF2F2;
            border: 1px solid #FECACA;
            border-radius: var(--radius-md);
            padding: 12px 16px;
            margin-bottom: 18px;
            display: none;
            align-items: flex-start;
            gap: 10px;
            animation: fadeInUp 0.3s ease-out;
        }

        .lockout-banner.visible { display: flex; }

        .lockout-banner i {
            color: var(--danger);
            font-size: 16px;
            margin-top: 1px;
            flex-shrink: 0;
        }

        .lockout-banner .lockout-title {
            font-size: 12px;
            font-weight: 700;
            color: #991B1B;
            margin-bottom: 2px;
        }

        .lockout-banner .lockout-msg {
            font-size: 11px;
            color: #B91C1C;
            line-height: 1.4;
        }

        .lockout-timer {
            font-weight: 800;
            font-variant-numeric: tabular-nums;
        }

        /* Toast */
        .toast-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .toast-custom {
            background: var(--white);
            border: 1px solid var(--cloud);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: 300px;
            animation: slideInRight 0.3s ease-out;
            border-left: 4px solid var(--edu-blue);
        }

        .toast-custom.success { border-left-color: var(--success); }
        .toast-custom.error { border-left-color: var(--danger); }
        .toast-custom.warning { border-left-color: var(--ra-gold); }
        .toast-custom i { font-size: 18px; }
        .toast-custom.success i { color: var(--success); }
        .toast-custom.error i { color: var(--danger); }
        .toast-custom.warning i { color: var(--ra-gold); }
        .toast-content { flex: 1; }
        .toast-title { font-size: 13px; font-weight: 700; margin-bottom: 2px; }
        .toast-msg { font-size: 11px; color: var(--slate); }
        .toast-close {
            background: none; border: none; color: var(--silver);
            cursor: pointer; padding: 4px; font-size: 14px;
        }

        @keyframes slideInRight {
            from { transform: translateX(100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        @keyframes slideOutRight {
            from { transform: translateX(0); opacity: 1; }
            to { transform: translateX(100%); opacity: 0; }
        }
        .toast-custom.hiding { animation: slideOutRight 0.3s ease-out forwards; }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 900px) {
            .login-left { display: none; }
            .login-right { padding: 24px; }
            .login-form-container { max-width: 100%; }
        }

        @media (max-width: 480px) {
            .login-right { padding: 20px; }
            .form-header h2 { font-size: 20px; }
            .captcha-wrapper { flex-wrap: wrap; }
            .captcha-input { min-width: 100%; order: 3; margin-top: 8px; }
        }