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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #034e52 0%, #0e9490 50%, #2dd4bf 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 1rem;
}

/* ── Card container ── */
.center {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    width: 960px;
    max-width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(3, 78, 82, 0.4);
}

/* ── Left panel ── */
.half-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    flex: 1;
    background: #f0fafa;
    padding: 48px 40px;
}

.logo-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-mark {
    width: 38px;
    height: 38px;
    background: #0e9490;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-mark::before {
    content: '';
    display: block;
    width: 14px;
    height: 14px;
    border: 2.5px solid white;
    border-radius: 4px;
    transform: rotate(16deg);
}

h1 {
    color: #034e52;
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 2px;
    margin: 0;
}

h2 {
    color: #0e9490;
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    margin: 0;
    line-height: 1.5;
}

.divider {
    width: 40px;
    height: 2.5px;
    background: linear-gradient(90deg, #2dd4bf, #0e9490);
    border-radius: 2px;
}

.purpose {
    background: rgba(14, 148, 144, 0.06);
    border: 1px solid rgba(14, 148, 144, 0.2);
    border-radius: 12px;
    font-size: 12px;
    color: #2c5f5e;
    padding: 14px 18px;
    line-height: 1.7;
    text-align: center;
    font-style: italic;
}

.signup-label {
    font-size: 11px;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: -6px;
}

.buttons {
    display: flex;
    flex-direction: row;
    gap: 10px;
}

#btnGoogle,
#btnApple {
    height: 40px;
    width: 130px;
    background: linear-gradient(135deg, #2dd4bf 0%, #0e9490 100%);
    border-radius: 10px;
    border: none;
    color: white;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px rgba(14, 148, 144, 0.3);
}

#btnGoogle:hover,
#btnApple:hover {
    background: linear-gradient(135deg, #0e9490 0%, #034e52 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(14, 148, 144, 0.4);
}

/* ── Right panel ── */
.half-image {
    width: 400px;
    flex-shrink: 0;
    background: linear-gradient(160deg, #0e9490 0%, #034e52 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
}

.half-image::before {
    content: '';
    position: absolute;
    width: 320px;
    height: 320px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.half-image::after {
    content: '';
    position: absolute;
    width: 220px;
    height: 220px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    bottom: -70px;
    left: -50px;
}

.img-frame {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 2.5px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tagline {
    color: rgba(255, 255, 255, 0.95);
    font-size: 15px;
    font-weight: 700;
    text-align: center;
    position: relative;
    z-index: 1;
    letter-spacing: 0.3px;
}

.features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.features li {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 9px 14px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #a8ede8;
    flex-shrink: 0;
}

/* ── Responsive ── */
@media (max-width: 700px) {
    .center {
        flex-direction: column;
        width: 100%;
        border-radius: 16px;
    }

    .half-image {
        width: 100%;
        padding: 32px 24px;
    }

    .half-welcome {
        padding: 36px 24px;
    }
}