/* =========================
   Base
=========================== */
:root {
  --clr-bg: #f9f9f9;
  --clr-bg-card: #ffffff;
  --clr-text: #333;
  --clr-primary: #000080;
  --radius: 12px;
  --shadow: 0 4px 10px rgba(0, 0, 0, .08);
}

/* ダークテーマ用 */
[data-theme="dark"] {
  --clr-bg: #1c1c1e;
  --clr-bg-card: #2c2c2e;
  --clr-text: #e5e5e7;
  --shadow: 0 4px 12px rgba(0, 0, 0, .5);
  --clr-primary: #5b8dff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  transition: background .3s, color .3s;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* =========================
   Header
=========================== */
.header {
  background: var(--clr-bg-card);
  box-shadow: var(--shadow);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  /* padding: .8rem 1rem; */
}

.header__logo {
  font-size: 1.3rem;
  color: var(--clr-primary);
}

.header__nav button {
  border: 0;
  background: none;
  color: var(--clr-text);
  font-size: 1.1rem;
  cursor: pointer;
}

/* =========================
   Hero
=========================== */
.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  margin: 2rem 0;
}

.hero__avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 3px solid var(--clr-primary);
  object-fit: cover;
}

.hero__text {
  flex: 1 1 260px;
}

/* =========================
   Sections
=========================== */
.section-title {
  font-size: 1.6rem;
  margin: 2.5rem 0 1rem;
  color: var(--clr-primary);
}

/* Timeline */
.timeline {
  list-style: none;
  padding-left: 0;
  border-left: 3px solid var(--clr-primary);
}

.timeline__item {
  position: relative;
  padding: .5rem 0 .5rem 1rem;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: .9rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clr-primary);
}

.timeline time {
  font-weight: 600;
  margin-right: .5rem;
}

/* Cards (Projects) */
.grid {
  display: grid;
  gap: 1.2rem;
}

@media (min-width:600px) {
  .grid.cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--clr-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .25s;
}

.card:hover {
  transform: translateY(-4px);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .9rem 1rem;
  cursor: pointer;
}

.card__title {
  font-size: 1.05rem;
  margin: 0;
}

.card__toggle {
  border: 0;
  background: none;
  font-size: 1rem;
  color: var(--clr-text);
}

.card__body {
  margin: 1rem;
  /* padding: 1.2rem 1rem; */
  list-style: disc;
  display: none;
}

.card.open .card__body {
  display: block;
}

/* Skills */
.skills .skill {
  background: var(--clr-bg-card);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  text-align: center;
}

@media(min-width:700px) {
  .grid.skills {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

.skill__icon {
  font-size: 2rem;
  margin-bottom: .5rem;
  color: var(--clr-primary);
}

.skill__icon {
  color: var(--clr-primary);
}

.skill__icon[style] {
  color: var(--clr);
}

/* インライン style で色変更 */
.skill__title {
  margin: .3rem 0 .6rem;
  font-size: 1.1rem;
}

.skill__tags {
  font-size: .9rem;
}

/* List */
.list {
  padding-left: 1.2rem;
}

.list li {
  margin: .4rem 0;
}

/* Footer */
.footer {
  text-align: center;
  font-size: .8rem;
  padding: 2rem 0;
  color: var(--clr-text);
}