:root {
            --bg-body: #f5f7fb;
            --bg-card: #ffffff;
            --border: #e2e8f0;
            --text-main: #0f172a;
            --text-muted: #6b7280;
            --primary: #2563eb;
            --primary-light: #e0ecff;
            --danger: #dc2626;
            --shadow-card: 0 10px 25px rgba(15, 23, 42, 0.08);
            --radius-xl: 18px;
            --warning-bg: #fef3c7;
            --warning-border: #facc15;
        }

        * { box-sizing: border-box; }

        body {
            margin: 0;
            min-height: 100vh;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: radial-gradient(circle at top, #e0f2fe 0, var(--bg-body) 45%, #e5e7eb 100%);
            color: var(--text-main);
            display: flex;
            flex-direction: column;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        header {
            position: sticky;
            top: 0;
            z-index: 10;
            backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.9);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.9rem 0;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #ef4444, #f97316);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
        }

        .brand-title {
            font-size: 1rem;
            font-weight: 700;
        }

        .brand-subtitle {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 0.9rem;
            font-size: 0.85rem;
            border-radius: 999px;
            border: 1px solid transparent;
            background: transparent;
            color: var(--text-main);
            cursor: pointer;
            text-decoration: none;
            transition: background 0.15s, border-color 0.15s;
        }

        .btn-back:hover {
            background: #f3f4f6;
            border-color: #e5e7eb;
        }

        main { flex: 1; }

        .page-section {
            max-width: 960px;
            padding: 2.2rem 0 3rem;
        }

        .page-heading {
            margin-bottom: 1.8rem;
        }

        .page-heading h2 {
            margin: 0;
            font-size: 1.7rem;
        }

        .page-heading p {
            margin: 0.4rem 0 0;
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        form {
            margin-top: 0.5rem;
        }

        .form-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border);
            padding: 1.6rem 1.5rem 1.7rem;
            box-shadow: var(--shadow-card);
            margin-bottom: 1.4rem;
        }

        .form-card h3 {
            margin: 0 0 0.25rem;
            font-size: 1.05rem;
        }

        .form-card p {
            margin: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .fields {
            margin-top: 1.1rem;
        }

        .field-group {
            margin-bottom: 1rem;
        }

        .field-row {
            display: grid;
            gap: 1rem;
        }

        @media (min-width: 640px) {
            .field-row {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
        }

        .required-mark {
            color: var(--danger);
            margin-left: 0.15rem;
        }

        input[type="text"],
        input[type="email"],
        input[type="tel"],
        input[type="date"],
        input[type="time"],
        select,
        textarea {
            margin-top: 0.35rem;
            width: 100%;
            border-radius: 10px;
            border: 1px solid var(--border);
            padding: 0.5rem 0.7rem;
            font-size: 0.9rem;
            font-family: inherit;
            background: #f9fafb;
            transition: border-color 0.12s, box-shadow 0.12s, background 0.12s;
        }

        textarea {
            min-height: 90px;
            resize: vertical;
        }

        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
            background: #ffffff;
        }

        .warning-box {
            border-radius: var(--radius-xl);
            border: 1px solid rgba(250, 204, 21, 0.7);
            background: rgba(254, 243, 199, 0.35);
            padding: 1.2rem 1.1rem;
            font-size: 0.86rem;
        }

        .warning-box-inner {
            display: flex;
            align-items: flex-start;
            gap: 0.65rem;
        }

        .warning-check {
            margin-top: 0.15rem;
        }

        .btn-submit-wrap {
            display: flex;
            justify-content: flex-end;
            padding-top: 0.6rem;
        }

        .btn-primary {
            border: none;
            outline: none;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.8rem 2.4rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            color: #fff;
            cursor: pointer;
            box-shadow: 0 12px 25px rgba(37, 99, 235, 0.4);
            transition: transform 0.08s, box-shadow 0.08s, opacity 0.15s;
        }

        .btn-primary:hover:enabled {
            opacity: 0.96;
            box-shadow: 0 16px 30px rgba(37, 99, 235, 0.5);
            transform: translateY(-1px);
        }

        .btn-primary:active:enabled {
            transform: translateY(1px) scale(0.99);
            box-shadow: 0 8px 18px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            box-shadow: 0 6px 14px rgba(148, 163, 184, 0.4);
        }

        footer {
            border-top: 1px solid var(--border);
            background: #ffffff;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        footer .container {
            text-align: center;
            padding: 0.9rem 1.5rem;
        }

        .icon {
            display: inline-block;
            vertical-align: middle;
        }