body {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 24px;
            gap: 12px;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.2s;
            width: 100%;
            max-width: 440px;
        }
        .back-link:hover { color: var(--text-heading); }

        .auth-card {
            width: 100%;
            max-width: 440px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 36px 40px;
            backdrop-filter: blur(20px);
            position: relative;
            overflow: hidden;
        }
        .auth-card::before {
            content: '';
            position: absolute;
            top: -90px; left: -90px;
            width: 240px; height: 240px;
            background: radial-gradient(circle, rgba(29,78,216,0.14), transparent 70%);
            pointer-events: none;
        }
        .auth-card::after {
            content: '';
            position: absolute;
            bottom: -60px; right: -60px;
            width: 200px; height: 200px;
            background: radial-gradient(circle, rgba(30,58,138,0.08), transparent 70%);
            pointer-events: none;
        }

        .auth-header {
            text-align: center;
            margin-bottom: 24px;
            position: relative; z-index: 1;
        }
        .auth-logo-wrap {
            width: 64px; height: 64px;
            border-radius: 18px;
            background: rgba(29,78,216,0.1);
            border: 1px solid rgba(29,78,216,0.2);
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 14px;
            overflow: hidden;
        }
        .auth-logo-wrap img { width: 46px; height: 46px; object-fit: contain; }

        .auth-title {
            font-size: 1.6rem; font-weight: 900;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .auth-subtitle { font-size: 0.875rem; color: var(--text-muted); }

        .auth-alert {
            display: none;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 0.85rem;
            text-align: center;
            margin-bottom: 14px;
            position: relative; z-index: 1;
        }
        .auth-alert.error {
            display: block;
            background: rgba(239,68,68,0.1);
            border: 1px solid rgba(239,68,68,0.3);
            color: #fca5a5;
        }
        .auth-alert.success {
            display: block;
            background: rgba(29,78,216,0.1);
            border: 1px solid rgba(29,78,216,0.3);
            color: #93c5fd;
        }

        .form-group {
            position: relative;
            margin-bottom: 12px;
            z-index: 1;
        }
        .form-icon {
            position: absolute;
            left: 14px; top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            pointer-events: none;
        }
        .form-input {
            width: 100%; height: 46px;
            background: rgba(0,0,0,0.3);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 0 16px 0 44px;
            font-family: inherit; font-size: 0.875rem;
            color: var(--text-heading);
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s;
            box-sizing: border-box;
        }
        .form-input::placeholder { color: var(--text-muted); }
        .form-input:focus {
            border-color: rgba(29,78,216,0.5);
            box-shadow: 0 0 0 3px rgba(29,78,216,0.08);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 12px;
            position: relative; z-index: 1;
        }
        .form-row .form-group { margin-bottom: 0; }

        .terms-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            position: relative; z-index: 1;
        }
        .terms-row input[type="checkbox"] {
            width: 16px; height: 16px;
            accent-color: var(--accent);
            cursor: pointer;
            flex-shrink: 0;
            border-radius: 4px;
        }
        .terms-row label {
            font-size: 0.83rem;
            color: var(--text-muted);
            cursor: pointer;
            line-height: 1.4;
        }
        .terms-row a { color: var(--accent-light); text-decoration: none; }
        .terms-row a:hover { color: #fff; }

        .turnstile-wrap {
            display: flex;
            justify-content: center;
            overflow: hidden;
            margin: 6px 0 8px;
            position: relative; z-index: 1;
        }

        .auth-submit {
            width: 100%; height: 46px;
            background: linear-gradient(180deg, var(--accent), var(--accent-dark));
            color: #fff;
            border: 1px solid rgba(59,130,246,0.4);
            border-radius: 12px;
            font-family: inherit; font-size: 0.9rem; font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 16px rgba(29,78,216,0.25);
            margin-bottom: 4px;
            position: relative; z-index: 1;
        }
        .auth-submit:hover:not(:disabled) {
            box-shadow: 0 4px 24px rgba(29,78,216,0.4);
            transform: translateY(-1px);
        }
        .auth-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

        .auth-divider {
            height: 1px; background: var(--border);
            margin: 20px 0;
            position: relative; z-index: 1;
        }

        .auth-footer {
            text-align: center;
            position: relative; z-index: 1;
        }
        .auth-footer p { font-size: 0.85rem; color: var(--text-muted); }
        .auth-footer a { color: var(--accent-light); font-weight: 600; text-decoration: none; transition: color 0.2s; }
        .auth-footer a:hover { color: #fff; }

        .section-label {
            font-size: 0.72rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-faint);
            margin-bottom: 8px;
            margin-top: 4px;
            position: relative; z-index: 1;
        }