/* ─── reset & base ─── */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: #eef2f6;
            font-family: 'Inter', sans-serif;
            padding: 2rem 1.5rem;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ─── premium card ─── */
        .premium-card {
            max-width: 1120px;
            width: 100%;
            background: #ffffff;
            border-radius: 2rem;
            box-shadow: 0 20px 60px rgba(0, 10, 30, 0.08), 0 8px 24px rgba(0, 0, 0, 0.02);
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .premium-card:hover {
            box-shadow: 0 30px 80px rgba(0, 10, 30, 0.12), 0 8px 32px rgba(0, 0, 0, 0.03);
        }

        /* ─── brand header ─── */
        .brand-header {
            background: linear-gradient(135deg, #0b1a33 0%, #1a3155 50%, #0f2847 100%);
            padding: 1.6rem 2.2rem 1.4rem;
            position: relative;
            overflow: hidden;
        }

        .brand-header::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(201, 168, 76, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .brand-header .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
            position: relative;
            z-index: 1;
        }

        .brand-header .brand-left {
            display: flex;
            align-items: center;
            gap: 0.9rem;
        }

        .brand-header .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: rgba(201, 168, 76, 0.18);
            border-radius: 14px;
            font-size: 1.8rem;
            line-height: 1;
            backdrop-filter: blur(2px);
            border: 1px solid rgba(201, 168, 76, 0.15);
        }

        .brand-header .brand-name {
            font-size: 1.9rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
            line-height: 1.1;
        }

        .brand-header .brand-name span {
            color: #dbb75e;
            font-weight: 300;
            margin-left: 2px;
        }

        .brand-header .brand-tagline {
            font-size: 0.8rem;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.3px;
            margin-top: 2px;
        }

        .brand-header .brand-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 0.4rem 1.2rem 0.4rem 0.9rem;
            border-radius: 40px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .brand-header .brand-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4ade80;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.85); }
        }

        .brand-header .sub-head {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
            font-weight: 400;
            margin-top: 0.3rem;
            position: relative;
            z-index: 1;
        }

        /* ─── form body ─── */
        form {
            padding: 2.2rem 2.2rem 1.8rem;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.4rem 2rem;
        }

        .field-group {
            display: flex;
            flex-direction: column;
            gap: 0.45rem;
        }

        .field-group.full-width {
            grid-column: 1 / -1;
        }

        label {
            font-weight: 600;
            font-size: 0.8rem;
            color: #1e293b;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .required-star {
            color: #e11d48;
            font-size: 1rem;
        }

        input,
        select,
        textarea {
            background: #fafcff;
            border: 1.5px solid #e2e8f0;
            border-radius: 0.85rem;
            padding: 0.75rem 1rem;
            font-size: 0.92rem;
            font-family: 'Inter', sans-serif;
            color: #0f172a;
            transition: all 0.25s ease;
            outline: none;
            width: 100%;
        }

        input::placeholder,
        textarea::placeholder {
            color: #94a3b8;
            font-weight: 400;
            font-size: 0.85rem;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: #3b82f6;
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
            background: #ffffff;
        }

        textarea {
            resize: vertical;
            min-height: 80px;
        }

        select {
            cursor: pointer;
            appearance: none;
            background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'></polyline></svg>");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            padding-right: 2.8rem;
        }

        /* ─── buttons row ─── */
        .actions-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
            align-items: center;
        }

        .actions-row .btn-submit {
            flex: 2 1 240px;
            background: linear-gradient(135deg, #1a4f8b, #2563eb);
            border: none;
            padding: 0.9rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 2.5rem;
            color: white;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.7rem;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
        }

        .actions-row .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.35);
            background: linear-gradient(135deg, #1a4f8b, #1d4ed8);
        }

        .actions-row .btn-submit:disabled {
            background: #94a3b8;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .actions-row .btn-clear {
            flex: 0 0 auto;
            background: transparent;
            border: 1.5px solid #e2e8f0;
            padding: 0.85rem 1.8rem;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 2.5rem;
            color: #475569;
            cursor: pointer;
            transition: all 0.25s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background: #f8fafc;
        }

        .actions-row .btn-clear:hover {
            background: #fee2e2;
            border-color: #f87171;
            color: #991b1b;
            transform: translateY(-1px);
        }

        .actions-row .btn-clear:active {
            transform: scale(0.97);
        }

        /* ─── message toast ─── */
        .msg-toast {
            margin: 0.2rem 2.2rem 1.6rem 2.2rem;
            padding: 0.8rem 1.2rem;
            border-radius: 1rem;
            text-align: center;
            font-weight: 500;
            font-size: 0.9rem;
            background: #f1f5f9;
            color: #0f172a;
            transition: all 0.3s ease;
            min-height: 3.4rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .msg-toast.success {
            background: #dcfce7;
            color: #166534;
            border-left: 4px solid #22c55e;
        }

        .msg-toast.error {
            background: #fee2e2;
            color: #991b1b;
            border-left: 4px solid #ef4444;
        }

        .msg-toast.info {
            background: #e0f2fe;
            color: #075985;
            border-left: 4px solid #38bdf8;
        }

        hr {
            margin: 0 2.2rem;
            border: none;
            border-top: 1px solid #eef2f6;
        }

        /* ─── required-field highlight ─── */
        .field-error input,
        .field-error select,
        .field-error textarea {
            border-color: #e11d48 !important;
            background-color: #fff5f5 !important;
        }

        /* ─── responsive ─── */
        @media (max-width: 820px) {
            body {
                padding: 1rem;
            }

            .brand-header {
                padding: 1.2rem 1.5rem 1rem;
            }

            .brand-header .brand-name {
                font-size: 1.5rem;
            }

            .brand-header .brand-icon {
                width: 40px;
                height: 40px;
                font-size: 1.4rem;
            }

            .brand-header .brand-badge {
                font-size: 0.65rem;
                padding: 0.25rem 1rem 0.25rem 0.7rem;
            }

            form {
                padding: 1.5rem 1.5rem 1.2rem;
            }

            .form-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }

            .actions-row {
                flex-direction: column;
            }

            .actions-row .btn-submit {
                flex: 1 1 auto;
                width: 100%;
            }

            .actions-row .btn-clear {
                flex: 1 1 auto;
                width: 100%;
                justify-content: center;
            }

            .msg-toast {
                margin: 0.2rem 1.5rem 1.2rem 1.5rem;
                font-size: 0.85rem;
                padding: 0.7rem 1rem;
                min-height: 3rem;
            }

            hr {
                margin: 0 1.5rem;
            }
        }

        @media (max-width: 420px) {
            .brand-header .brand-row {
                flex-direction: column;
                align-items: flex-start;
            }

            .brand-header .brand-badge {
                align-self: flex-start;
            }

            .brand-header .brand-name {
                font-size: 1.3rem;
            }
        }