:root { color-scheme: light; font-family: Inter, ui-sans-serif, system-ui, sans-serif; color: #153f48; background: #eef8f7; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
.page-shell { width: min(960px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0; }
header { margin-bottom: 24px; }
h1, h2, p { margin: 0; }
h1 { font-size: clamp(2.4rem, 7vw, 4.5rem); letter-spacing: -0.06em; }
h2 { font-size: 1.35rem; letter-spacing: -0.03em; }
.eyebrow { margin-bottom: 6px; color: #16807c; font-size: .75rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.intro, .tank-card p { color: #5d7478; margin-top: 10px; }
.message { min-height: 1.5rem; margin: 0 0 12px; color: #357076; font-size: .9rem; }
.message.error { color: #a52f2f; }
.card { background: #fff; border: 1px solid #d6e9e7; border-radius: 18px; box-shadow: 0 10px 30px rgba(22, 87, 90, .06); }
.tank-card { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 28px; margin-bottom: 44px; }
.status { color: #17653a; background: #dff7e8; border-radius: 999px; padding: 8px 12px; white-space: nowrap; font-size: .85rem; font-weight: 700; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.parameter-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.parameter { min-height: 145px; padding: 20px; display: flex; flex-direction: column; }
.parameter span, small { color: #637c80; font-size: .85rem; }
.parameter strong { font-size: 1.55rem; letter-spacing: -.05em; margin: auto 0 5px; }
.activity { margin-top: 44px; padding: 28px; }
ul { list-style: none; padding: 0; margin: 0; }
li { display: flex; gap: 16px; padding: 16px 0; border-top: 1px solid #e4eeee; }
time { color: #16807c; font-weight: 800; width: 58px; }
li span { display: grid; gap: 4px; }
.form-grid { display: grid; grid-template-columns: 3fr 2fr; gap: 20px; margin-top: 44px; }
.entry-form { display: grid; gap: 16px; padding: 28px; }
label { display: grid; gap: 7px; color: #355a60; font-size: .9rem; font-weight: 700; }
input, textarea { width: 100%; border: 1px solid #b9d3d0; border-radius: 8px; padding: 10px; background: #fbfefe; color: #153f48; font: inherit; font-weight: 400; }
textarea { resize: vertical; }
.input-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
button { justify-self: start; border: 0; border-radius: 9px; padding: 10px 13px; background: #16807c; color: #fff; cursor: pointer; font: inherit; font-weight: 700; }
button:hover { background: #0e6865; } button:disabled { background: #a8c5c3; cursor: wait; }
@media (max-width: 720px) { .page-shell { padding: 40px 0; } .parameter-grid { grid-template-columns: repeat(2, 1fr); } .tank-card { align-items: flex-start; flex-direction: column; } .form-grid { grid-template-columns: 1fr; } }