* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #f9fafb 0%, #edf1f7 100%);
            color: #334155;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            overflow: hidden; /* Tambahkan ini agar tidak bisa di scroll */
        }
        .container {
            width: 100%;
            max-width: 420px;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 35px 28px;
            position: relative;
            overflow: hidden;
            animation: fadeIn 0.6s ease-out forwards;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .container::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: #17cbb3;
            border-radius: 16px 0 0 16px;
        }
        h2 {
            color: #17cbb3;
            text-align: center;
            margin-bottom: 24px;
            font-size: 1.5rem;
            font-weight: 600;
            position: relative;
        }
        h2::after {
            content: "";
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            background-color: #17cbb3;
            border-radius: 2px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        label {
            display: block;
            margin-bottom: 7px;
            font-weight: 500;
            color: #475569;
        }
        input[type="email"], input[type="text"], input[type="password"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1em;
            background: #f8fafc;
            transition: border 0.2s;
        }
        input:focus {
            border-color: #17cbb3;
            outline: none;
            background: #fff;
            box-shadow: 0 0 0 3px rgba(23, 203, 179, 0.15);
        }
        .btn {
            width: 100%;
            padding: 14px;
            background: #17cbb3;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            margin-top: 10px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(23, 203, 179, 0.3);
            position: relative;
            overflow: hidden;
            text-decoration: none;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(23, 203, 179, 0.35);
            background: #14b09e;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transform: translate(-50%, -50%) scale(0);
            transition: transform 0.4s ease-out;
            opacity: 0;
        }
        .btn:hover::after {
            transform: translate(-50%, -50%) scale(1);
            opacity: 1;
        }
        .alert {
            color: #e53e3e;
            background: #fff5f5;
            border-left: 4px solid #e53e3e;
            border-radius: 6px;
            padding: 14px;
            margin-bottom: 20px;
            animation: slideInDown 0.4s ease-out forwards;
        }
        .success {
            color: #2f855a;
            background: #f0fff4;
            border-left: 4px solid #2f855a;
            border-radius: 6px;
            padding: 14px;
            margin-bottom: 20px;
            animation: slideInDown 0.4s ease-out forwards;
        }
        @keyframes slideInDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .text-center {
            text-align: center;
        }
        .back-link {
            display: block;
            text-align: center;
            margin-top: 18px;
            color: #17cbb3;
            text-decoration: none;
            font-weight: 500;
            border-radius: 8px;
            transition: all 0.3s;
            padding: 10px;
        }
        .back-link:hover {
            background: rgba(23, 203, 179, 0.08);
            text-decoration: underline;
        }
        .back-link.disabled {
            color: #a0aec0 !important;
            cursor: not-allowed !important;
            pointer-events: none !important;
        }
        #timer {
            text-align: center;
            color: #64748b;
            margin-top: 10px;
            font-size: 0.9rem;
            height: 20px;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { opacity: 0.6; }
            50% { opacity: 1; }
            100% { opacity: 0.6; }
        }
        /* OTP digit group style */
        .digit-group {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-bottom: 20px;
        }
        .digit-group input {
            width: 40px;
            height: 50px;
            background-color: #f8fafc;
            border: 1px solid #e2e8f0;
            line-height: 50px;
            text-align: center;
            font-size: 1.2rem;
            font-weight: 500;
            border-radius: 8px;
            margin: 0 2px;
            transition: all 0.3s;
        }
        .digit-group input:focus {
            outline: none;
            border-color: #17cbb3;
            box-shadow: 0 0 0 3px rgba(23, 203, 179, 0.15);
            background: #fff;
        }
        .hidden-input {
            position: absolute;
            opacity: 0;
            pointer-events: none;
        }
        @media (max-width: 400px) {
            .container {
                padding: 28px 16px;
            }
            h2 {
                font-size: 1.2rem;
                margin-bottom: 18px;
            }
            .digit-group input {
                width: 32px;
                height: 40px;
                font-size: 1rem;
            }
        }