:root {
    --blue: #1677db;
    --deep: #102a43;
    --soft: #eef8ff;
    --line: #d9e5ef;
}
* {
    box-sizing: border-box;
}
body {
    margin: 0;
    background: #f7fbfe;
    color: var(--deep);
    font: 16px/1.5 system-ui, sans-serif;
}
header {
    height: 68px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 max(5vw, 24px);
}
.brand {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--deep);
    text-decoration: none;
}
nav {
    display: flex;
    gap: 18px;
}
a {
    color: var(--blue);
}
nav a {
    text-decoration: none;
    color: #48617a;
}
main {
    max-width: 960px;
    margin: 0 auto;
    padding: 56px 24px;
}
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 26px;
    box-shadow: 0 10px 30px #1778b50a;
}
.auth {
    max-width: 510px;
    margin: 0 auto;
}
.auth h1 {
    margin-top: 0;
}
.auth form {
    display: grid;
    gap: 16px;
}
label {
    display: grid;
    gap: 6px;
    font-weight: 650;
}
input,
textarea {
    font: inherit;
    border: 1px solid #b8cad9;
    border-radius: 8px;
    padding: 10px 12px;
    resize: vertical;
}
button,
.button {
    background: var(--blue);
    color: white;
    border: 0;
    border-radius: 8px;
    padding: 11px 16px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}
.secondary {
    background: #e9f4ff;
    color: #1262b4;
}
.flash {
    max-width: 650px;
    margin: 0 auto 20px;
    border-radius: 8px;
    padding: 12px 15px;
}
.flash.error {
    background: #fff0f0;
    color: #941b1b;
}
.flash.success {
    background: #edfff4;
    color: #176b42;
}
.dashboard-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 28px;
}
.dashboard-head h1 {
    margin: 2px 0 0;
}
.eyebrow {
    font-size: 0.73rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #55718a;
    margin: 0;
}
.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.stats span {
    display: block;
    color: #55718a;
}
.stats strong {
    display: block;
    font-size: 2.3rem;
    margin: 9px 0;
}
.stats small {
    font-size: 1rem;
    color: #668099;
    font-weight: 500;
}
.stats em {
    color: #55718a;
    font-style: normal;
    font-size: 0.9rem;
}
.progress {
    height: 9px;
    background: #e6f0f6;
    border-radius: 99px;
    overflow: hidden;
    margin: 12px 0;
}
.progress i {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, #30b6ed, var(--blue));
    border-radius: inherit;
}
.log {
    margin-top: 22px;
}
.log h2 {
    margin-top: 0;
}
.log form {
    display: flex;
    gap: 10px;
}
.log input {
    max-width: 220px;
}
.quick {
    margin-top: 14px;
    display: flex;
    gap: 14px;
    font-size: 0.9rem;
}
.profile {
    display: grid;
    gap: 34px;
}
.profile-hero {
    background: linear-gradient(135deg, #e5f5ff, #fff);
    border-radius: 20px;
    padding: 44px;
    display: flex;
    align-items: center;
    gap: 22px;
}
.profile-hero h1 {
    margin: 3px 0;
}
.profile-hero p:last-child {
    margin-bottom: 0;
    color: #48617a;
    white-space: pre-wrap;
}
.avatar {
    background: var(--blue);
    color: #fff;
    width: 74px;
    height: 74px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 2rem;
    font-weight: 800;
}
.landing-hero {
    min-height: 390px;
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    gap: 48px;
}
.landing-hero h1 {
    font-size: clamp(2.6rem, 6vw, 4.6rem);
    line-height: 1.04;
    letter-spacing: -0.05em;
    margin: 10px 0 18px;
}
.lead {
    font-size: 1.12rem;
    color: #48617a;
    max-width: 570px;
}
.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 27px;
}
.water-card {
    padding: 32px;
    background: linear-gradient(145deg, #1a91e3, #0f57b6);
    border-radius: 22px;
    color: #fff;
    box-shadow: 0 20px 45px #1677db45;
}
.water-card span {
    font-size: 3.5rem;
}
.water-card p {
    margin: 18px 0 0;
    opacity: 0.82;
}
.water-card strong {
    display: block;
    font-size: 2rem;
}
.water-card .progress {
    background: #ffffff42;
}
.water-card .progress i {
    background: #fff;
}
.water-card em {
    opacity: 0.85;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 42px;
}
.feature-grid h2 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}
.feature-grid p {
    color: #55718a;
    margin: 0;
}
.feature-icon {
    color: var(--blue);
    font-size: 1.5rem;
}
.profile-actions {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-end;
    gap: 10px;
    color: #555;
    margin-top: 16px;
}
.report-button {
    background: transparent;
    height: 46px;
    color: #7a3b3b;
    border: 1px solid #e6c6c6;
    padding: 8px 12px;
    font-size: 0.87rem;
}
@media (max-width: 600px) {
    nav {
        gap: 10px;
        font-size: 0.85rem;
    }
    .dashboard-head,
    .log form {
        align-items: stretch;
        flex-direction: column;
    }
    .stats,
    .feature-grid,
    .landing-hero {
        grid-template-columns: 1fr;
    }
    .landing-hero {
        gap: 28px;
    }
    .profile-hero {
        padding: 26px;
        align-items: flex-start;
    }
    main {
        padding-top: 35px;
    }
}