/* ===== Reset / Base ===== */
* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: #222;
  background: #fff;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

button, input, select, textarea {
  font: inherit;
}

hr {
  border: none;
  border-top: 1px solid #eee;
  margin: 24px 0;
}

/* ===== Layout ===== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

/* ===== Header ===== */
header {
  border-bottom: 1px solid #eee;
  background: #fff;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

header h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.02em;
}

nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

nav a {
  font-size: 14px;
  color: #444;
  padding: 6px 8px;
  border-radius: 8px;
}

nav a:hover {
  background: #f6f6f6;
}

/* ===== Footer ===== */
footer {
  border-top: 1px solid #eee;
  padding: 18px 0;
  text-align: center;
  font-size: 13px;
  color: #666;
}

footer a {
  color: #666;
}

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

/* ===== Buttons ===== */
.btn,
button {
  cursor: pointer;
}

.btn-primary {
  display: inline-block;
  border: none;
  background: #111;
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-outline {
  display: inline-block;
  border: 1px solid #ddd;
  background: #fff;
  color: #222;
  padding: 10px 16px;
  border-radius: 10px;
}

.btn-outline:hover {
  background: #fafafa;
}

/* ===== Like button common ===== */
.js-like-btn {
  background: none;
  border: none;
  padding: 6px 10px;
  border-radius: 999px;
  color: #666;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.js-like-btn:hover {
  background: #f6f6f6;
}

.js-like-btn.liked {
  color: #e25555;
  font-weight: 600;
}

/* ===== Forms common ===== */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="file"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 10px;
  border: 1px solid #ddd;
  border-radius: 10px;
  font-size: 14px;
  outline: none;
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: #bbb;
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  nav {
    flex-wrap: wrap;
  }
}