:root {
 color-scheme: light;
 --bg: #f4f7fb;
 --card: #ffffff;
 --text: #10233a;
 --accent: #1266f1;
 --error-bg: #ffe8e8;
 --error-text: #b3261e;
 --border: #d9e2ee;
}

* { box-sizing: border-box; }

body {
 margin: 0;
 font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
 background: radial-gradient(circle at top right, #e7f0ff 0%, #f4f7fb 40%);
 color: var(--text);
 line-height: 1.5;
}

.container {
 width: min(1200px, 94vw);
 margin: 20px auto 32px;
 display: grid;
 gap: 12px;
}

h1, h2 { margin: 0; }

h1 {
 font-size: clamp(1.3rem, 2.6vw, 1.85rem);
 line-height: 1.25;
 letter-spacing: 0.01em;
}

.note {
 background: #e9f1ff;
 border-left: 4px solid var(--accent);
 padding: 8px 10px;
 border-radius: 8px;
 margin: 0;
}

.card {
 background: var(--card);
 border: 1px solid var(--border);
 border-radius: 12px;
 padding: 12px;
 box-shadow: 0 6px 18px rgba(10, 28, 54, 0.06);
}


.page-tabs {
 display: grid;
 grid-template-columns: repeat(3, minmax(0, 1fr));
 gap: 8px;
}

.tab-link {
 display: inline-block;
 text-align: center;
 padding: 8px 12px;
 border: 1px solid #c9d8ec;
 border-radius: 999px;
 background: #f2f7ff;
 color: #285389;
 text-decoration: none;
 font-weight: 700;
 font-size: 0.9rem;
}

.tab-link.active {
 background: #1266f1;
 border-color: #1266f1;
 color: #ffffff;
}

.page-content-card p,
.page-content-card ul {
 margin: 0;
}

.page-content-card ul {
 padding-left: 20px;
 display: grid;
 gap: 6px;
}

.result-card { display: grid; gap: 10px; }

.trajectory-panel {
 border: 1px solid #d6dfeb;
 border-radius: 10px;
 overflow: hidden;
 background: #f7f9fc;
}

canvas { display: block; width: 100%; height: auto; }

.result-list {
 margin: 0;
 padding: 0;
 list-style: none;
 display: grid;
 gap: 6px;
}

.result-list li {
 display: flex;
 justify-content: space-between;
 align-items: center;
 border: 1px solid #e0e6ef;
 border-radius: 10px;
 padding: 8px 10px;
 background: #fbfdff;
}

.compare-values {
 display: grid;
 grid-template-columns: repeat(2, minmax(84px, auto));
 gap: 14px;
 text-align: right;
}

.result-list strong { color: #0d4fb3; }

.input-grid {
 display: grid;
 grid-template-columns: repeat(2, minmax(0, 1fr));
 gap: 12px;
 position: relative;
}

.input-grid::after {
 content: "";
 position: absolute;
 top: 0;
 bottom: 0;
 left: 50%;
 width: 1px;
 background: #e5ecf5;
 transform: translateX(-6px);
}

.input-grid.single-input {
 grid-template-columns: 1fr;
}

.input-grid.single-input::after {
 display: none;
}

.card-head {
 display: flex;
 align-items: center;
 justify-content: space-between;
 margin-bottom: 4px;
}

.distance-form { display: grid; gap: 8px; }
.field { display: grid; gap: 4px; }

.field-head {
 display: flex;
 justify-content: space-between;
 align-items: baseline;
 gap: 8px;
}

label { font-weight: 700; font-size: 0.95rem; }
.range-note { font-size: 0.78rem; color: #5b7089; white-space: nowrap; }

.range-row {
 display: grid;
 grid-template-columns: 1fr auto;
 align-items: center;
 gap: 8px;
}

input[type="range"] { width: 100%; margin: 0; }

output {
 min-width: 66px;
 text-align: right;
 font-weight: 700;
 color: var(--accent);
 font-size: 0.92rem;
}

.inline-metric {
 display: flex;
 justify-content: space-between;
 align-items: center;
 background: #edf5ff;
 border: 1px solid #d7e5ff;
 border-radius: 9px;
 padding: 8px 10px;
 font-weight: 700;
 font-size: 0.9rem;
}

.inline-metric strong { color: var(--accent); font-size: 1rem; }

.wind-help {
 font-size: 0.76rem;
 color: #5b7089;
 line-height: 1.3;
}

.range-input-stack {
 position: relative;
 padding-bottom: 20px;
}

.range-input-stack input[type="range"] {
 display: block;
 width: 100%;
}

.launch-angle-marks {
 position: absolute;
 left: 0;
 right: 0;
 bottom: 0;
 height: 16px;
 font-size: 0.72rem;
 color: #5b7089;
}

.launch-angle-marks span {
 position: absolute;
 left: var(--pos);
 transform: translateX(-50%);
 white-space: nowrap;
 line-height: 1;
}

.launch-angle-marks span::before {
 content: "";
 position: absolute;
 left: 50%;
 transform: translateX(-50%);
 top: -9px;
 width: 1px;
 height: 6px;
 background: #9fb0c4;
}

.error {
 display: none;
 margin: 0;
 background: var(--error-bg);
 color: var(--error-text);
 border-left: 4px solid var(--error-text);
 padding: 6px 8px;
 border-radius: 8px;
 font-size: 0.88rem;
}

.error.show { display: block; }

.action-row {
 display: grid;
 grid-template-columns: 1fr auto;
 gap: 8px;
}

button {
 border: none;
 border-radius: 8px;
 background: var(--accent);
 color: #fff;
 font-size: 14px;
 font-weight: 700;
 padding: 9px 10px;
 cursor: pointer;
}

button:hover { opacity: 0.94; }

button.secondary-btn {
 border: 1px solid #b8c8df;
 background: #eef4ff;
 color: #214f93;
 font-size: 12px;
 padding: 8px 10px;
 white-space: nowrap;
}

button.secondary-btn:hover { opacity: 1; background: #e4efff; }

button.copy-btn {
 border: 1px solid #b8c8df;
 background: #eef4ff;
 color: #214f93;
 font-size: 12px;
 padding: 8px 10px;
 white-space: nowrap;
}

button.copy-btn:hover { opacity: 1; background: #e4efff; }

@media (max-width: 960px) {
 .input-grid { grid-template-columns: 1fr; }
 .input-grid::after { display: none; }
 .compare-values { grid-template-columns: 1fr; gap: 2px; }
 .page-tabs { grid-template-columns: 1fr; }
 h1 { font-size: 1.2rem; }
}


.ad-space {
 display: grid;
 gap: 8px;
}

.ad-placeholder {
 min-height: 110px;
 border: 1px dashed #b7c7de;
 border-radius: 10px;
 background: repeating-linear-gradient(
   -45deg,
   #f6f9ff,
   #f6f9ff 10px,
   #edf3ff 10px,
   #edf3ff 20px
 );
 color: #4a6283;
 display: grid;
 place-items: center;
 font-weight: 700;
 letter-spacing: 0.02em;
}

.site-footer {
 border-top: 1px solid #d7e1ef;
 background: #f8fbff;
 margin-top: 10px;
}

.footer-inner {
 width: min(1200px, 94vw);
 margin: 0 auto;
 padding: 12px 0 16px;
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 10px;
}

.footer-inner small {
 color: #59708e;
}

.footer-inner nav {
 display: flex;
 gap: 12px;
}

.footer-inner a {
 color: #1f4f95;
 text-decoration: none;
 font-weight: 600;
 font-size: 0.9rem;
}

.footer-inner a:hover {
 text-decoration: underline;
}

@media (max-width: 960px) {
 .footer-inner {
  flex-direction: column;
  align-items: flex-start;
 }
}