:root {
            --clr-bg: #030325;
            --clr-surface: #ffe3ff;
            --clr-primary: #04aa6d;
            --clr-primary-dark: #018354;
            --clr-primary-border: #015837;
            --clr-accent: chocolate;
            --clr-accent-alt: burlywood;
            --clr-text: #d1d1d1;
            --clr-heading: #fff;
            --radius: .5rem;
            --shadow: 0 0 .75rem rgba(0,0,0,.5);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: 'Roboto', sans-serif;
            background: var(--clr-bg);
            color: var(--clr-text);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 0;
            line-height: 1.4;
        }

        main {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 100%;
            padding: clamp(.25rem, .9vw, .55rem) 1rem;
        }

        /* -------------------- Tab Navigation -------------------- */
        .tab-container {
            margin-top: 1.8rem;
            width: 100%;
            max-width: 30rem;
        }

        .tab-nav {
            display: flex;
            gap: 0;
            margin-bottom: 0;
        }

        .tab-btn {
            flex: 1;
            padding: .8rem 1rem;
            border: 2px solid var(--clr-accent);
            border-bottom: none;
            background: #333;
            color: var(--clr-text);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s, color .2s;
            border-radius: var(--radius) var(--radius) 0 0;
        }

        .tab-btn:first-child {
            border-right: 1px solid var(--clr-accent);
        }

        .tab-btn:last-child {
            border-left: 1px solid var(--clr-accent);
        }

        .tab-btn:hover {
            background: #444;
        }

        .tab-btn.active {
            background: var(--clr-surface);
            color: indigo;
            border-bottom: 2px solid var(--clr-surface);
            margin-bottom: -2px;
            position: relative;
            z-index: 1;
        }

        /* -------------------- Form Card -------------------- */
        .form-card {
            background: var(--clr-surface);
            border: 2px solid var(--clr-accent);
            border-radius: 0 0 var(--radius) var(--radius);
            box-shadow: var(--shadow);
            width: 100%;
            padding: clamp(.35rem, .9vw, .75rem);
            display: none;
            flex-direction: column;
            gap: .5rem;
        }

        .form-card.active {
            display: flex;
        }

        fieldset {
            border: 2px solid chocolate;
            border-radius: var(--radius);
            padding: .4rem .8rem .7rem;
            display: flex;
            flex-direction: column;
            gap: .1rem;
        }

        legend {
            font-size: 1.15rem;
            font-weight: 700;
            color: indigo;
            text-align: center;
            margin: 0 auto;
            padding: 0 .5rem;
        }

        .legend-info {
            color: #c00;
            font-size: 1.15rem;
            margin-bottom: -.4rem;
        }

        label {
            font-weight: 510;
            color: indigo;
            font-size: 1.2rem;
            margin: 0 0 0.05rem .3rem;
            margin-bottom: 0;
        }

        .intent-label {
            display: flex;
            justify-content: center;
            margin-top: .2rem;
            font-size: 1.1rem;
            color: indigo;
            font-weight: 500;
        }

        .inline-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .3rem;
            margin: .1rem 0;
            flex-wrap: wrap;
        }

        .inline-item label {
            font-size: 1.07rem;
            font-weight: 500;
        }

        input[type="checkbox"] {
            cursor: pointer;
            accent-color: var(--clr-primary);
            margin: 0 0 .2rem .1rem;
        }

        input[type="text"],
        input[type="file"] {
            width: 100%;
            border: 1px solid #222;
            background: #16222f;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 700;
            color: #ffd99b;
        }

        input[type="text"] {
            padding: 1rem;
            margin-bottom: .6rem;
        }

        input[type="file"] {
            padding: .8rem 1rem;
            margin-bottom: .55rem;
        }

        input[type="file"]::file-selector-button {
            background: #444;
            color: var(--clr-surface);
            padding: .4rem 1rem;
            border: 0;
            border-radius: var(--radius);
            cursor: pointer;
            transition: background .2s;
        }

        input[type="file"]::file-selector-button:hover {
            background: #666;
        }

        input::placeholder {
            color: #989;
            font-style: italic;
        }

        .actions {
            display: flex;
            justify-content: center;
            margin-block: .5rem 0;
        }

        .btn {
            background: var(--clr-primary-dark);
            border: 2px solid var(--clr-primary-border);
            padding: .7rem 1rem;
            border-radius: var(--radius);
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s;
            min-width: 7rem;
        }

        .btn:hover {
            background: #016043;
        }

        .btn:disabled {
            background: #666;
            color: darkgray;
            border-color: darkslategray;
            cursor: not-allowed;
        }

        .error-msg {
            color: red;
            font-size: 0.9rem;
            font-weight: 500;
            text-align: center;
        }

        .info p {
            margin: .3rem .4rem;
            font-size: 1.14rem;
            color: darkmagenta;
            font-weight: 540;
            line-height: 1.44;
        }

        .info p span {
            color: darkblue;
            font-weight: 700;
        }

        .info a {
            color: mediumblue;
        }

        hr {
            border: 0;
            height: 1px;
            background: purple;
            margin: .65rem 0;
        }

        /* -------------------- Footer -------------------- */
        .ftr-ln {
            height: 0.56px;
            background-color: purple;
            width: 100%;
            margin: 0;
        }

        footer {
            text-align: center;
            width: 100%;
            background: linear-gradient(to left, #162226 0%, #16222F 100%);
            margin-top: auto;
        }

        .ftr-content {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 0.75rem 0;
        }

        footer a {
            display: inline-block;
            margin: 0;
            font-weight: bold;
            font-size: clamp(1.05rem, 2.3vw, 1.18rem);
            color: lightsteelblue;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        footer a:hover {
            color: mistyrose;
        }

        /* -------------------- Image Preview -------------------- */
        #imagePreviewContainer {
            display: grid;
            place-items: center;
            gap: .5rem;
            width: 100%;
            max-width: 30rem;
            margin-top: 1.75rem;
        }

        .preview-title {
            font-size: 1.1rem;
            color: #fff;
            font-weight: 600;
            text-align: center;
        }

        #imagePreviewContainer img {
            max-width: 14rem;
            border: 2px solid #ccc;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        /* -------------------- Desktop Breakpoints -------------------- */
        @media (min-width: 48rem) {
            .tab-container {
                max-width: 28rem;
            }

            #imagePreviewContainer {
                max-width: 28rem;
            }
        }

        @media (min-width: 64rem) {
            .tab-container {
                max-width: 30rem;
            }

            #imagePreviewContainer {
                max-width: 30rem;
            }
        }

        /* -------------------- Smaller Desktop (≤1400px) -------------------- */
        @media (max-width: 1400px) and (min-width: 481px) {
            .tab-container {
                max-width: 24rem;
                margin-top: 1.1rem;
            }

            .tab-btn {
                font-size: .85rem;
                padding: .6rem .8rem;
            }

            .form-card {
                padding: .54rem .6rem;
                gap: .1rem;
            }

            legend {
                font-size: .87rem;
            }

            .legend-info {
                font-size: 0.92rem;
                margin-bottom: -.3rem;
            }

            label {
                font-size: .85rem;
                margin-left: .2rem;
            }

            .intent-label {
                font-size: .84rem;
            }

            .inline-item label {
                font-size: 0.83rem;
            }

            input[type="text"] {
                padding: .7rem;
                font-size: .9rem;
                margin-bottom: .45rem;
            }

            input[type="file"] {
                padding: .55rem .8rem;
                font-size: .84rem;
                margin-bottom: .35rem;
            }

            input[type="file"]::file-selector-button {
                padding: .3rem .8rem;
                font-size: .85rem;
            }

            input[type="checkbox"] {
                margin: 0;
            }

            .btn {
                font-size: .9rem;
                padding: .55rem .8rem;
                min-width: 5.5rem;
            }

            .preview-title {
                font-size: .9rem;
            }

            #imagePreviewContainer img {
                max-width: 9rem;
            }

            .info p {
                font-size: .84rem;
                margin: 0 0.2rem .2rem;
                font-weight: 540;
                line-height: 1.4;
            }

            .ftr-content {
                padding: 0.55rem 0;
            }

            .ftr-ln {
                height: 0.41px;
            }

            footer a {
                font-size: clamp(0.72rem, 2.2vw, 1.02rem);
            }
        }

        /* -------------------- Mobile phones (≤480px) -------------------- */
        @media (max-width: 480px) {
            main {
                padding: 1rem .6rem;
            }

            .tab-container {
                max-width: 95vw;
                margin-top: .7rem;
            }

            .tab-btn {
                font-size: .75rem;
                padding: .5rem .6rem;
            }

            .form-card {
                max-width: 100%;
                padding: .5rem .7rem;
                gap: .35rem;
            }

            legend {
                font-size: .8rem;
            }

            .legend-info {
                font-size: 1rem;
            }

            label {
                font-size: .8rem;
                margin-left: .15rem;
            }

            .intent-label {
                font-size: .83rem;
            }

            .inline-item label {
                font-size: .82rem;
                font-weight: 500;
            }

            input[type="text"] {
                padding: .55rem;
                font-size: .8rem;
                margin-bottom: .35rem;
            }

            input[type="file"] {
                padding: .45rem;
                font-size: .8rem;
                margin-bottom: .25rem;
            }

            input[type="file"]::file-selector-button {
                padding: .2rem .6rem;
                font-size: .75rem;
            }

            .btn {
                font-size: .8rem;
                padding: .45rem .6rem;
                min-width: 5rem;
            }

            .preview-title {
                font-size: .8rem;
            }

            #imagePreviewContainer img {
                max-width: 55%;
                display: block;
                margin: auto;
            }

            .info p {
                font-size: .86rem;
            }

            .ftr-content {
                padding: 0.41rem 0;
            }

            .ftr-ln {
                height: 0.31px;
            }

            footer a {
                font-size: clamp(1.1rem, 2.5vw, 1.22rem);
            }
        }