:root {
    font-family: "Segoe UI", sans-serif;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
}

body {
    --page: #e8f4f2;
    --surface: rgba(255, 255, 255, 0.9);
    --ink: #173b42;
    --muted: #56747a;
    --accent: #087e83;
    --accent-hover: #05666b;
    --border: #c7deda;
    --table-border: #b2cfcb;
    --soft: #f1f8f6;
    min-height: 100vh;
    margin: 0;
    padding: 48px 20px;
    box-sizing: border-box;
    color: var(--ink);
    background-color: var(--page);
    background-image:
        radial-gradient(ellipse at 80% 0%, rgba(244, 190, 120, .42), transparent 35%),
        linear-gradient(155deg, #f7fbf8 0%, #dcefeb 52%, #b5d9d9 100%);
    transition: background-color .25s, color .25s;
}

.page-shell {
    width: min(760px, 100%);
    margin: 0 auto;
}

.site-navigation { margin: 0 0 8px; }
.site-navigation ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    list-style: none;
}
.site-navigation li { flex: 1 1 0; min-width: 0; text-align: center; }
.site-navigation a {
    display: block;
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}
.site-navigation a:hover { text-decoration: underline; }
.site-navigation-current {
    display: block;
    color: var(--ink);
    font-weight: 800;
    text-decoration: none;
}
.account-greeting {
    margin: 0 0 24px;
    color: var(--accent);
    font-size: 1.15rem;
    font-weight: 800;
}
[hidden] { display: none !important; }

.masthead { margin-bottom: 30px; }
.eyebrow {
    margin: 0 0 9px;
    color: var(--accent);
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
}
h1 { margin: 0; font-size: clamp(2rem, 6vw, 3.4rem); letter-spacing: -.045em; }
.intro { max-width: 540px; margin: 12px 0 0; color: var(--muted); line-height: 1.6; }
.billing-link { display: inline-block; margin-top: 12px; color: var(--accent); font-weight: 700; }

.panel {
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: 0 16px 45px rgba(15, 49, 57, .09);
    backdrop-filter: blur(12px);
    padding: clamp(22px, 5vw, 36px);
}

.submit-button {
    display: inline-block;
    min-height: 44px;
    padding: 10px 16px;
    border: 0;
    border-radius: 9px;
    color: #fff;
    background: var(--accent);
    font: inherit;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}
.submit-button:hover { background: var(--accent-hover); }
.submit-button:disabled { opacity: .65; cursor: wait; }
.submit-button:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
    outline-offset: 2px;
}
button[hidden] { display: none; }

.billing-message { min-height: 1.5em; color: var(--muted); }
.plans { display: grid; gap: 14px; margin: 24px 0; }
.plans[hidden], #accountDetails[hidden], #emailConfirmForm[hidden] { display: none; }
.plan {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--soft);
}
#portalButton[hidden], #plans[hidden] { display: none; }

.account-details { display: grid; gap: 26px; margin-top: 24px; }
.account-section { padding-top: 22px; border-top: 1px solid var(--border); }
.account-section h2 { margin: 0 0 10px; font-size: 1.2rem; }
.account-help { color: var(--muted); font-size: .92rem; line-height: 1.5; }
.account-form { display: grid; gap: 10px; margin-top: 16px; }
.account-form label { font-size: .92rem; font-weight: 700; }
.account-form input {
    width: 100%;
    min-height: 46px;
    box-sizing: border-box;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--ink);
    background: var(--surface);
    font: inherit;
}
.account-form input:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
    outline-offset: 2px;
}
.account-form .submit-button { justify-self: start; }

@media (max-width: 600px) {
    body { padding: 24px 12px; }
    .masthead { margin-bottom: 22px; }
    .eyebrow { font-size: .72rem; }
    .intro { margin-top: 10px; }
    .panel { padding: 20px 16px; border-radius: 16px; }
}

@media (max-width: 520px) {
    .plan { align-items: stretch; flex-direction: column; }
}