:root {
            --bg-dark: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
            --card-bg-dark: rgba(255, 255, 255, 0.1);
            --text-dark: #fff;
            --placeholder-dark: rgba(255, 255, 255, 0.7);
            --bokeh-dark: rgba(255, 255, 255, 0.08);

            --bg-light: linear-gradient(135deg, #ffffff, #f3f3f3);
            --card-bg-light: rgba(0, 0, 0, 0.06);
            --text-light: #222;
            --placeholder-light: #666;
            --bokeh-light: rgb(40 6 85 / 54%);
        }

        html[data-theme='dark'] {
            --bg: var(--bg-dark);
            --card-bg: var(--card-bg-dark);
            --text-color: var(--text-dark);
            --placeholder-color: var(--placeholder-dark);
            --bokeh-color: var(--bokeh-dark);
        }

        html[data-theme='light'] {
            --bg: var(--bg-light);
            --card-bg: var(--card-bg-light);
            --text-color: var(--text-light);
            --placeholder-color: var(--placeholder-light);
            --bokeh-color: var(--bokeh-light);
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', sans-serif;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: var(--bg);
            color: var(--text-color);
            overflow: hidden;
            position: relative;
            transition: background 0.4s, color 0.4s;
        }

        .bokeh-background {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 0;
        }

        .bokeh {
            position: absolute;
            width: 180px;
            height: 180px;
            background: var(--bokeh-color);
            border-radius: 50%;
            filter: blur(60px);
            animation: float 30s infinite ease-in-out alternate;
            mix-blend-mode: screen;
        }

        .b1 {
            top: 10%;
            left: 20%;
            animation-delay: 1s;
        }

        .b2 {
            top: 30%;
            left: 70%;
            animation-delay: 2s;
        }

        .b3 {
            top: 60%;
            left: 30%;
            animation-delay: 3s;
        }

        .b4 {
            top: 80%;
            left: 80%;
            animation-delay: 4s;
        }

        .b5 {
            top: 50%;
            left: 10%;
            animation-delay: 5s;
        }

        .b6 {
            top: 20%;
            left: 80%;
            animation-delay: 6s;
        }

        .b7 {
            top: 70%;
            left: 50%;
            animation-delay: 7s;
        }

        @keyframes float {
            0% {
                transform: translate(0, 0) scale(1);
            }

            50% {
                transform: translate(60px, -60px) scale(1.2);
            }

            100% {
                transform: translate(-60px, 60px) scale(1);
            }
        }

        .login-card {
            position: relative;
            z-index: 1;
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 50px 40px;
            border-radius: 25px;
            width: 340px;
            text-align: center;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
        }

        .login-card:hover {
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        .login-card h2 {
            margin-bottom: 25px;
            font-weight: 600;
            font-size: 24px;
        }

        .login-card input {
            width: 80%;
            padding: 12px 30px;
            margin: 12px 0;
            border: none;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-color);
            font-size: 15px;
            transition: background 0.3s;
        }

        .login-card input::placeholder {
            color: var(--placeholder-color);
        }

        .login-card input:focus {
            background: rgba(255, 255, 255, 0.25);
            outline: 1px;
        }

        .login-card button {
            width: 100%;
            padding: 12px;
            margin-top: 18px;
            background: rgba(255, 255, 255, 0.3);
            border: none;
            border-radius: 12px;
            color: var(--text-color);
            font-size: 16px;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s;
        }

        .login-card button:hover {
            background: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .input-group {
            position: relative;
            margin: 12px;
        }

        .input-group i {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--placeholder-color);
        }

        .error {
            margin-bottom: 15px;
            color: #ff4d4d;
        }

        /* Toggle Switch Styles */
        .checkbox {
            display: none;
        }

        .switch-lm {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 60px;
            height: 26px;
            background: rgb(102 96 171);
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 6px;
            z-index: 1;
            box-sizing: border-box;
            cursor: pointer;
            transition: background 0.3s;
        }

        .switch-lm .bx {
            font-size: 18px;
            color: white;
        }

        .switch-lm .ball {
            position: absolute;
            top: 3px;
            left: 3px;
            width: 20px;
            height: 20px;
            background: black;
            border-radius: 50%;
            transition: transform 0.3s;
        }

        .checkbox:checked+.switch-lm .ball {
            transform: translateX(34px);
            background: white;
        }