:root {
    --bg: #f2f5f1;
    --card: #ffffff;
    --text: #15251f;
    --muted: #65736c;
    --primary: #245c4a;
    --primary-dark: #153a2f;
    --accent: #e8b15a;
    --danger: #b84747;
    --warning: #c9871c;
    --ok: #237a54;
    --line: #dfe7e1;
    --shadow: 0 14px 34px rgba(21, 37, 31, 0.09);
    --radius: 22px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background: radial-gradient(circle at top left, #f9edda 0, transparent 34rem), var(--bg);
    min-height: 100vh;
    padding-bottom: 5.5rem;
}

a { color: inherit; }

.app-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: space-between;
    padding: 0.9rem 1rem;
    background: rgba(242, 245, 241, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(223, 231, 225, 0.75);
}

.brand {
    display: flex;
    gap: 0.7rem;
    align-items: center;
    text-decoration: none;
    min-width: max-content;
}

.brand-icon {
    display: grid;
    place-items: center;
    width: 2.6rem;
    height: 2.6rem;
    border-radius: 1rem;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}

.brand small { display: block; color: var(--muted); font-size: 0.78rem; }

.top-nav { display: none; gap: 0.4rem; align-items: center; }
.top-nav a {
    padding: 0.6rem 0.75rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--muted);
    font-weight: 650;
}
.top-nav a:hover { background: #fff; color: var(--text); }
.logout-form { display: flex; }

.page {
    width: min(1080px, 100%);
    margin: 0 auto;
    padding: 1rem;
}

h1, h2, h3 { margin: 0 0 0.5rem; line-height: 1.1; }
h1 { font-size: clamp(2rem, 8vw, 4rem); letter-spacing: -0.05em; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }
p { line-height: 1.55; }

.card, .hero-card, .exercise-card, .timer-card, .notice-card, .stat-card {
    background: var(--card);
    border: 1px solid rgba(223, 231, 225, 0.8);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card { padding: 1.1rem; }
.hero-card {
    display: grid;
    gap: 1rem;
    padding: 1.2rem;
    background: linear-gradient(135deg, #245c4a 0%, #2f765f 100%);
    color: #fff;
}
.hero-card p { color: rgba(255,255,255,0.8); }

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--accent);
    font-weight: 800;
    font-size: 0.75rem;
    margin-bottom: 0.4rem;
}

.muted { color: var(--muted); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.7rem;
    margin: 1rem 0;
}
.stat-card { padding: 1rem; }
.stat-card span { display: block; font-size: 2rem; font-weight: 850; letter-spacing: -0.06em; }
.stat-card strong { display: block; color: var(--muted); font-size: 0.82rem; }

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1rem;
    margin: 1.5rem 0 0.8rem;
}

.card-list { display: grid; gap: 0.9rem; }
.exercise-card {
    display: grid;
    gap: 1rem;
    padding: 1rem;
}
.exercise-card.inactive { opacity: 0.6; }
.goal { color: var(--primary); font-weight: 700; }
.pill-row { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.7rem; }
.pill-row span, .badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0.35rem 0.65rem;
    background: #edf4ef;
    color: var(--primary-dark);
    font-size: 0.82rem;
    font-weight: 700;
}
.badge.ok { background: #e2f4ea; color: var(--ok); }
.badge.warn { background: #fff2dd; color: var(--warning); }

.notice-card {
    display: grid;
    gap: 0.25rem;
    padding: 1rem;
    margin: 1rem 0;
    border-left: 6px solid var(--accent);
}
.notice-card a { color: var(--primary); font-weight: 800; }

.button {
    border: 0;
    border-radius: 999px;
    padding: 0.85rem 1.05rem;
    min-height: 2.75rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.95rem;
    transition: transform 0.15s ease, opacity 0.15s ease;
}
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--primary); color: #fff; }
.button.ghost { background: #edf4ef; color: var(--primary-dark); }
.button.danger { background: #ffe7e7; color: var(--danger); }
.button.small { min-height: 2.25rem; padding: 0.55rem 0.8rem; font-size: 0.83rem; }
.button.large { min-height: 3.4rem; font-size: 1.1rem; }
.button.full { width: 100%; }
.button-row { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; }
.vertical-mobile { align-items: stretch; }
.vertical-mobile .button, .vertical-mobile form, .vertical-mobile button { width: 100%; }

.form-stack, .form-grid { display: grid; gap: 1rem; }
.form-grid { grid-template-columns: 1fr; }
label { display: grid; gap: 0.35rem; font-weight: 750; color: var(--primary-dark); }
input, textarea, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0.85rem 0.9rem;
    font: inherit;
    background: #fbfdfb;
    color: var(--text);
}
textarea { resize: vertical; }
.full-line { grid-column: 1 / -1; }
.check-card {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0.85rem;
    background: #fbfdfb;
}
.check-card input { width: 1.2rem; height: 1.2rem; }

.flash {
    padding: 0.85rem 1rem;
    border-radius: 16px;
    margin: 0 0 1rem;
    background: #edf4ef;
    color: var(--primary-dark);
    font-weight: 700;
}
.flash.error { background: #ffe7e7; color: var(--danger); }
.flash.warning { background: #fff2dd; color: #7b4e00; }
.flash.success { background: #e2f4ea; color: var(--ok); }

.login-shell { display: grid; min-height: 70vh; place-items: center; }
.login-card { width: min(480px, 100%); padding: 1.3rem; }

.list-card { display: grid; gap: 0.8rem; }
.history-row, .admin-user-row, .log-top {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}
.history-row + .history-row, .admin-user-row + .admin-user-row, .log-item + .log-item {
    padding-top: 0.9rem;
    border-top: 1px solid var(--line);
}
.history-row small, .admin-user-row small, .log-top small { display: block; color: var(--muted); margin-top: 0.15rem; }
.log-item { display: grid; gap: 0.55rem; }
.note { background: #fbf7ee; padding: 0.8rem; border-radius: 16px; margin: 0; }

.timer-shell { display: grid; gap: 1rem; }
.timer-card {
    text-align: center;
    padding: 1.2rem;
}
.timer-status {
    display: inline-flex;
    margin: 1rem auto;
    padding: 0.45rem 1rem;
    border-radius: 999px;
    background: #edf4ef;
    color: var(--primary-dark);
    font-weight: 850;
}
.timer-number {
    font-size: clamp(5rem, 34vw, 12rem);
    line-height: 0.9;
    font-weight: 900;
    letter-spacing: -0.08em;
    color: var(--primary-dark);
}
.timer-progress {
    height: 1rem;
    border-radius: 999px;
    background: #e5ece7;
    overflow: hidden;
    margin: 1.2rem 0 0.7rem;
}
.timer-progress span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    transition: width 0.25s linear;
}
.timer-meta { color: var(--muted); font-weight: 800; }
.timer-buttons { justify-content: center; margin-top: 1rem; }
.hidden { display: none !important; }

.bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.2rem;
    padding: 0.5rem 0.55rem env(safe-area-inset-bottom);
    background: rgba(255,255,255,0.92);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(12px);
}
.bottom-nav a {
    display: grid;
    place-items: center;
    gap: 0.1rem;
    color: var(--muted);
    text-decoration: none;
    font-weight: 800;
    font-size: 1.1rem;
}
.bottom-nav span { font-size: 0.72rem; }

@media (min-width: 760px) {
    body { padding-bottom: 0; }
    .page { padding: 2rem; }
    .top-nav, .logout-form { display: flex; }
    .bottom-nav { display: none; }
    .hero-card { grid-template-columns: 1fr auto; align-items: center; padding: 2rem; }
    .exercise-card { grid-template-columns: 1fr auto; align-items: center; padding: 1.25rem; }
    .form-grid { grid-template-columns: repeat(2, 1fr); }
    .vertical-mobile .button, .vertical-mobile form, .vertical-mobile button { width: auto; }
    .timer-card { padding: 2rem; }
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f1714;
        --card: #17211d;
        --text: #f0f6f2;
        --muted: #a9b9b0;
        --line: #2b3933;
        --shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
    }
    body { background: radial-gradient(circle at top left, rgba(232,177,90,0.16), transparent 34rem), var(--bg); }
    .app-header, .bottom-nav { background: rgba(15, 23, 20, 0.88); }
    input, textarea, select, .check-card { background: #111a16; color: var(--text); }
    .top-nav a:hover { background: #17211d; }
    .note { background: #211d16; }
}