:root {
            --color-primary: #292524;
            --color-primary-active: #0c0a09;
            --color-ink: #0c0a09;
            --color-body: #4e4e4e;
            --color-body-strong: #292524;
            --color-muted: #777169;
            --color-muted-soft: #a8a29e;
            --color-hairline: #e7e5e4;
            --color-hairline-soft: #f0efed;
            --color-hairline-strong: #d6d3d1;
            --color-canvas: #f5f5f5;
            --color-canvas-soft: #fafafa;
            --color-surface-card: #ffffff;
            --color-surface-strong: #f0efed;
            --color-on-primary: #ffffff;
            --color-gradient-mint: #a7e5d3;
            --color-gradient-peach: #f4c5a8;
            --color-gradient-lavender: #c8b8e0;
            --color-gradient-sky: #a8c8e8;
            --color-gradient-rose: #e8b8c4;
            --color-semantic-error: #dc2626;
            --space-xxs: 4px;
            --space-xs: 8px;
            --space-sm: 12px;
            --space-base: 16px;
            --space-md: 20px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-xxl: 48px;
            --space-section: 96px;
            --rounded-xs: 4px;
            --rounded-sm: 6px;
            --rounded-md: 8px;
            --rounded-lg: 12px;
            --rounded-xl: 16px;
            --rounded-xxl: 24px;
            --rounded-pill: 9999px;
            --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.04);
        }

        /* ============================================================
           RESET & BASE
           ============================================================ */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
            height: 100%;
        }
        body {
            font-family: 'Inter', sans-serif;
            font-weight: 400;
            font-size: 16px;
            line-height: 1.5;
            letter-spacing: 0.16px;
            color: var(--color-body);
            background-color: var(--color-canvas);
            min-height: 100%;
            display: flex;
            flex-direction: column;
        }
        img { display: block; max-width: 100%; height: auto; }
        a { color: inherit; text-decoration: none; }

        /* ============================================================
           TOP NAVIGATION (minimal)
           ============================================================ */
        .top-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--color-hairline-soft);
            backdrop-filter: blur(12px);
            background-color: rgba(245, 245, 245, 0.92);
        }
        .top-nav__inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-lg);
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-brand {
            font-family: 'EB Garamond', serif;
            font-size: 22px;
            font-weight: 300;
            color: var(--color-ink);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            text-decoration: none;
        }
        .nav-brand .brand-icon {
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: var(--rounded-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-on-primary);
            font-size: 14px;
            font-weight: 600;
            font-family: 'Inter', sans-serif;
        }
        .nav-back {
            font-family: 'Inter', sans-serif;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
        }
        .nav-back:hover { color: var(--color-ink); }
        .nav-back svg { width: 16px; height: 16px; }

        /* ============================================================
           REGISTER PAGE LAYOUT
           ============================================================ */
        .register-page {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: calc(64px + var(--space-xxl)) var(--space-lg) var(--space-xxl);
            position: relative;
            overflow: hidden;
        }

        /* Atmospheric gradient orbs */
        .register-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.4;
            pointer-events: none;
        }
        .register-orb--sky {
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, var(--color-gradient-sky) 0%, transparent 70%);
            top: -90px;
            left: -70px;
            animation: orbDrift1 20s ease-in-out infinite;
        }
        .register-orb--rose {
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, var(--color-gradient-rose) 0%, transparent 70%);
            bottom: -70px;
            right: -50px;
            animation: orbDrift2 24s ease-in-out infinite;
        }
        .register-orb--mint {
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, var(--color-gradient-mint) 0%, transparent 70%);
            top: 55%;
            right: 20%;
            transform: translateY(-50%);
            animation: orbDrift3 18s ease-in-out infinite;
        }

        @keyframes orbDrift1 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(-30px, 20px) scale(1.05); }
            66% { transform: translate(20px, -15px) scale(0.95); }
        }
        @keyframes orbDrift2 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(25px, -20px) scale(1.08); }
            66% { transform: translate(-15px, 25px) scale(0.92); }
        }
        @keyframes orbDrift3 {
            0%, 100% { transform: translateY(-50%) translate(0, 0) scale(1); }
            33% { transform: translateY(-50%) translate(-20px, 15px) scale(1.06); }
            66% { transform: translateY(-50%) translate(15px, -20px) scale(0.94); }
        }

        /* ============================================================
           REGISTER CARD
           ============================================================ */
        .register-card {
            position: relative;
            z-index: 2;
            background: var(--color-surface-card);
            border: 1px solid var(--color-hairline);
            border-radius: var(--rounded-xl);
            padding: var(--space-xxl);
            width: 100%;
            max-width: 420px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);

            /* Entrance animation */
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.7s ease 0.1s forwards;
        }

        @keyframes fadeInUp {
            to { opacity: 1; transform: translateY(0); }
        }

        /* Card header */
        .register-card__header {
            text-align: center;
            margin-bottom: var(--space-xl);
        }
        .register-card__icon {
            width: 48px;
            height: 48px;
            background: var(--color-primary);
            border-radius: var(--rounded-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-md);
            color: var(--color-on-primary);
        }
        .register-card__icon svg {
            width: 24px;
            height: 24px;
        }
        .register-card__title {
            font-family: 'EB Garamond', 'Times New Roman', serif;
            font-size: 32px;
            font-weight: 300;
            line-height: 1.13;
            letter-spacing: -0.32px;
            color: var(--color-ink);
            margin-bottom: var(--space-xs);
        }
        .register-card__subtitle {
            font-family: 'Inter', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.47;
            letter-spacing: 0.15px;
            color: var(--color-muted);
        }

        /* ============================================================
           FORM ELEMENTS
           ============================================================ */
        .form-group {
            margin-bottom: var(--space-md);
        }
        .form-label {
            display: block;
            font-family: 'Inter', sans-serif;
            font-size: 14px;
            font-weight: 500;
            line-height: 1.5;
            letter-spacing: 0;
            color: var(--color-body-strong);
            margin-bottom: var(--space-xs);
        }
        .form-input {
            width: 100%;
            background-color: var(--color-surface-card);
            color: var(--color-ink);
            font-family: 'Inter', sans-serif;
            font-size: 16px;
            font-weight: 400;
            line-height: 1.5;
            letter-spacing: 0.16px;
            border: 1px solid var(--color-hairline-strong);
            border-radius: var(--rounded-md);
            padding: 12px 16px;
            height: 44px;
            outline: none;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-input::placeholder {
            color: var(--color-muted-soft);
        }
        .form-input:focus {
            border-color: var(--color-ink);
            border-width: 2px;
            padding: 11px 15px;
            box-shadow: 0 0 0 3px rgba(41, 37, 36, 0.06);
        }
        .form-input--error {
            border-color: var(--color-semantic-error);
        }
        .form-input--error:focus {
            border-color: var(--color-semantic-error);
            box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
        }
        .form-error {
            font-family: 'Inter', sans-serif;
            font-size: 13px;
            font-weight: 400;
            color: var(--color-semantic-error);
            margin-top: var(--space-xxs);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .form-error svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        /* ============================================================
           BUTTONS
           ============================================================ */
        .btn-primary {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            background-color: var(--color-primary);
            color: var(--color-on-primary);
            font-family: 'Inter', sans-serif;
            font-size: 15px;
            font-weight: 500;
            line-height: 1.0;
            letter-spacing: 0;
            padding: 10px 20px;
            height: 44px;
            border-radius: var(--rounded-pill);
            border: none;
            cursor: pointer;
            transition: background-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
            margin-top: var(--space-lg);
        }
        .btn-primary:hover {
            background-color: var(--color-primary-active);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(12, 10, 9, 0.15);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* ============================================================
           FORM FOOTER
           ============================================================ */
        .register-card__footer {
            margin-top: var(--space-lg);
            text-align: center;
        }
        .register-card__footer-link {
            font-family: 'Inter', sans-serif;
            font-size: 14px;
            font-weight: 400;
            color: var(--color-muted);
            transition: color 0.2s ease;
        }
        .register-card__footer-link:hover {
            color: var(--color-ink);
        }

        /* Divider */
        .register-card__divider {
            display: flex;
            align-items: center;
            gap: var(--space-base);
            margin: var(--space-lg) 0;
            color: var(--color-muted-soft);
            font-family: 'Inter', sans-serif;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .register-card__divider::before,
        .register-card__divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--color-hairline);
        }

        /* ============================================================
           PAGE FOOTER
           ============================================================ */
        .page-footer {
            text-align: center;
            padding: var(--space-lg);
            font-family: 'Inter', sans-serif;
            font-size: 13px;
            color: var(--color-muted-soft);
        }

        /* ============================================================
           RESPONSIVE
           ============================================================ */
        @media (max-width: 640px) {
            .register-page {
                padding: calc(64px + var(--space-lg)) var(--space-base) var(--space-lg);
            }
            .register-card {
                padding: var(--space-xl) var(--space-lg);
                border-radius: var(--rounded-lg);
            }
            .register-card__title {
                font-size: 28px;
            }
            .register-orb--sky { width: 250px; height: 250px; }
            .register-orb--rose { width: 200px; height: 200px; }
            .register-orb--mint { width: 180px; height: 180px; }
        }