*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        :root {
            --navy:       #1A3A4A;
            --teal:       #4A9B8E;
            --teal-hover: #3D8578;
            --bg:         #F8F7F4;
            --surface:    #FFFFFF;
            --border:     #E8E4DC;
            --text:       #1A1A1A;
            --muted:      #6B7280;
            --error-bg:   #FEF2F2;
            --error-bd:   #FECACA;
            --error-tx:   #C0392B;
            --font-d: 'DM Serif Display', serif;
            --font-b: 'Inter', sans-serif;
        }

        html, body { height: 100%; font-family: var(--font-b); color: var(--text); }
        body { display: flex; min-height: 100vh; }

        /* ── Painel esquerdo (marca) ── */
        .brand {
            width: 44%;
            background-color: var(--navy);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 52px 56px;
            position: relative;
            overflow: hidden;
        }

        /* Círculos decorativos sutis */
        .brand::before, .brand::after {
            content: '';
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(74, 155, 142, 0.18);
        }
        .brand::before { width: 480px; height: 480px; top: -160px; right: -180px; }
        .brand::after  { width: 300px; height: 300px; bottom: 40px;  left: -100px; }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            position: relative;
            z-index: 1;
        }
        .brand-logo svg { width: 28px; height: 28px; stroke: var(--teal); }
        .brand-logo span {
            font-family: var(--font-d);
            font-size: 17px;
            color: rgba(255,255,255,0.9);
        }

        .brand-body {
            position: relative;
            z-index: 1;
        }
        .brand-body h1 {
            font-family: var(--font-d);
            font-size: 46px;
            line-height: 1.08;
            color: #fff;
            margin-bottom: 20px;
        }
        .brand-body h1 em {
            color: var(--teal);
            font-style: normal;
        }
        .brand-body p {
            font-size: 15px;
            line-height: 1.65;
            color: rgba(255,255,255,0.55);
            max-width: 300px;
        }

        .brand-footer {
            font-size: 12px;
            color: rgba(255,255,255,0.25);
            position: relative;
            z-index: 1;
        }

        /* ── Painel direito (formulário) ── */
        .form-side {
            flex: 1;
            background-color: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 48px 40px;
        }

        .form-card {
            width: 100%;
            max-width: 380px;
        }

        .form-card h2 {
            font-family: var(--font-d);
            font-size: 34px;
            color: var(--navy);
            margin-bottom: 6px;
        }
        .form-card .subtitle {
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 36px;
        }

        .error {
            background: var(--error-bg);
            border: 1px solid var(--error-bd);
            color: var(--error-tx);
            padding: 10px 14px;
            border-radius: 8px;
            font-size: 13px;
            margin-bottom: 20px;
        }

        .field { margin-bottom: 18px; }
        .field label {
            display: block;
            font-size: 12px;
            font-weight: 600;
            color: var(--navy);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 7px;
        }
        .field input {
            width: 100%;
            padding: 12px 15px;
            border: 1.5px solid var(--border);
            border-radius: 8px;
            font-size: 15px;
            font-family: var(--font-b);
            background: var(--surface);
            color: var(--text);
            transition: border-color 0.15s, box-shadow 0.15s;
        }
        .field input::placeholder { color: #C0BAB2; }
        .field input:focus {
            outline: none;
            border-color: var(--teal);
            box-shadow: 0 0 0 3px rgba(74,155,142,0.14);
        }

        .btn {
            width: 100%;
            padding: 13px;
            background-color: var(--teal);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            font-family: var(--font-b);
            cursor: pointer;
            margin-top: 8px;
            transition: background-color 0.15s, transform 0.1s;
        }
        .btn:hover  { background-color: var(--teal-hover); }
        .btn:active { transform: scale(0.99); }

        .form-foot {
            text-align: center;
            margin-top: 28px;
            font-size: 13px;
            color: var(--muted);
        }
        .form-foot a { color: var(--teal); text-decoration: none; font-weight: 500; }
        .form-foot a:hover { text-decoration: underline; }

        /* ── Tema Dark ── */
        [data-theme="dark"] {
            --navy:       #F3F4F6;
            --teal:       #56B3A6;
            --teal-hover: #4A9B8E;
            --bg:         #111827;
            --surface:    #1F2937;
            --border:     #374151;
            --text:       #F9FAFB;
            --muted:      #9CA3AF;
            --error-bg:   rgba(192,57,43,0.15);
            --error-bd:   rgba(192,57,43,0.4);
            --error-tx:   #FCA5A5;
        }
        [data-theme="dark"] .brand { background-color: #1F2937; }

        .btn-theme {
            position: absolute;
            top: 20px; right: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--muted);
            width: 34px; height: 34px;
            border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            cursor: pointer; transition: all 0.15s;
        }
        .btn-theme:hover { color: var(--navy); border-color: var(--teal); }
        .btn-theme svg { width: 15px; height: 15px; stroke: currentColor; fill: none;
                         stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

        @media (max-width: 768px) {
            .brand    { display: none; }
            .form-side { padding: 40px 24px; }
        }