/*
 * DevFest 2026 高雄場 — 活動預告頁
 * 精簡基礎樣式，方便日後重新設計時整包替換。
 */

:root {
  --color-blue: #4285f4;
  --color-green: #34a853;
  --color-yellow: #f9ab00;
  --color-red: #ea4335;
  --color-text: #1e1e1e;
  --color-muted: #5f6368;
  --color-bg: #ffffff;
  --color-surface: #f6f8fc;
  --radius: 16px;
  --max-width: 960px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Google Sans', 'Roboto', 'Noto Sans TC', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.site {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 0 3rem;
}

.hero__tagline {
  color: var(--color-muted);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.hero__title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-blue), var(--color-green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__meta {
  margin-top: 1.25rem;
  font-size: 1.15rem;
  color: var(--color-text);
}

.hero__dot {
  margin: 0 0.6rem;
  color: var(--color-muted);
}

.hero__review {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.7rem 1.75rem;
  border: 2px solid var(--color-blue);
  border-radius: 999px;
  color: var(--color-blue);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.hero__review:hover {
  background: var(--color-blue);
  border-color: var(--color-blue);
  color: #fff;
}

/* Countdown */
.countdown {
  text-align: center;
  padding: 2rem 0 4rem;
}

.countdown__title {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.countdown__timer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.countdown__segment {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 4.5rem;
  padding: 1rem 0.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
}

.countdown__number {
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-blue);
}

.countdown__label {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

.countdown__separator {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-muted);
}

.countdown__ended {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-green);
}

/* Surveys */
.surveys {
  text-align: center;
  padding: 2rem 0 4rem;
}

.surveys__title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.surveys__subtitle {
  color: var(--color-muted);
  margin-bottom: 2.5rem;
}

.surveys__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.survey-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.survey-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.survey-card__icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.survey-card__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.survey-card__desc {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.survey-card__button {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: var(--color-blue);
  color: #fff;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.95rem;
}

.survey-card:hover .survey-card__button {
  background: var(--color-green);
}

/* Footer */
.footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid #ececec;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.footer__links {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer__links a {
  color: var(--color-blue);
  text-decoration: none;
}

.footer__links a:hover {
  text-decoration: underline;
}

/* RWD */
@media (max-width: 768px) {
  .hero {
    padding: 3.5rem 0 2rem;
  }

  .surveys__grid {
    grid-template-columns: 1fr;
  }

  .countdown__segment {
    min-width: 3.75rem;
  }
}

/* 桌機：當視窗夠寬且夠高時，整頁鎖在單一視窗高度內，不需捲動 */
@media (min-width: 769px) and (min-height: 760px) {
  body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .site {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    min-height: 0;
  }

  .hero {
    padding: 1rem 0 0.5rem;
  }

  .hero__review {
    margin-top: 0.75rem;
    padding: 0.5rem 1.5rem;
    font-size: 0.95rem;
  }

  .countdown {
    padding: 0.5rem 0;
  }

  .countdown__title {
    margin-bottom: 1rem;
  }

  .surveys {
    padding: 0.5rem 0;
  }

  .surveys__subtitle {
    margin-bottom: 1.5rem;
  }

  /* 四張卡片並排一行，壓縮垂直高度 */
  .surveys__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .survey-card {
    padding: 1.5rem 1rem;
  }

  .footer {
    padding: 1.25rem;
  }
}