/* style.css - 端點星基地｜星球留言板 (PLANET TRANSMISSION BOARD) */

:root {
  color-scheme: dark;
  --bg-deep: #030812;
  --bg-surface: #061322;
  --bg-panel: #091a2e;
  --bg-card: rgba(8, 24, 43, 0.85);
  --border-cyan: rgba(112, 228, 255, 0.35);
  --border-gold: rgba(255, 207, 86, 0.45);
  --border-subtle: rgba(73, 114, 138, 0.3);
  --cyan: #70e4ff;
  --gold: #ffcf56;
  --purple: #b98aff;
  --green: #52ffb8;
  --danger: #ff6b6b;
  --ink: #eaf6fc;
  --muted: #8eaec0;
  --font-main: "Inter", system-ui, -apple-system, "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  --font-tech: "Orbitron", "Share Tech Mono", monospace, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(ellipse at 50% 0%, #102d4d 0%, #040e1b 45%, #020710 100%);
  color: var(--ink);
  font-family: var(--font-main);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* 背景星塵與深空網格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: 
    radial-gradient(#bdeaff77 0.75px, transparent 1px),
    radial-gradient(#8cbaff66 0.65px, transparent 1px);
  background-size: 88px 88px, 137px 137px;
  background-position: 20px 30px, 50px 70px;
  opacity: 0.3;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: repeating-linear-gradient(0deg, rgba(112, 228, 255, 0.012) 0px, rgba(112, 228, 255, 0.012) 1px, transparent 1px, transparent 3px);
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; }
input, select, textarea { font: inherit; }

.container {
  width: min(1240px, calc(100% - 36px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* 頂部全域導航列 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(3, 11, 20, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-cyan);
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.6);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: radial-gradient(circle, rgba(112, 228, 255, 0.3), rgba(6, 26, 45, 0.9));
  border: 1px solid var(--cyan);
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 22px;
  box-shadow: 0 0 15px rgba(112, 228, 255, 0.4);
}

.brand-text strong {
  display: block;
  font-size: 19px;
  letter-spacing: 0.06em;
  color: #fff;
}

.brand-text small {
  display: block;
  font-size: 9.5px;
  font-family: var(--font-tech);
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #b5d5e8;
}

.nav-links a:hover {
  color: #fff;
}

.btn-open-post {
  background: linear-gradient(135deg, #1d699e, #0c3e60);
  border: 1px solid var(--cyan);
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 0 16px rgba(112, 228, 255, 0.3);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-open-post:hover {
  background: #257fb8;
  box-shadow: 0 0 24px rgba(112, 228, 255, 0.6);
  transform: translateY(-2px);
}

/* 主視覺區塊 */
.hero {
  padding: 45px 0 25px;
}

.hero-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 25px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-tech);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  background: rgba(112, 228, 255, 0.08);
  border: 1px solid rgba(112, 228, 255, 0.4);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.signal-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulseSignal 2s infinite;
}

@keyframes pulseSignal {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.85); }
}

.hero h1 {
  font-size: clamp(28px, 3.8vw, 48px);
  line-height: 1.25;
  margin: 0 0 12px;
  letter-spacing: 0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(112, 228, 255, 0.35);
}

.hero-p {
  font-size: 14.5px;
  line-height: 1.85;
  color: #adc9dc;
  max-width: 680px;
  margin: 0;
}

/* 狀態 HUD 矩陣 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.stat-item {
  background: linear-gradient(180deg, rgba(9, 28, 48, 0.8), rgba(4, 15, 27, 0.9));
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px 18px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.stat-k {
  display: block;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.stat-v {
  font-size: 24px;
  font-family: var(--font-tech);
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.stat-v small {
  font-size: 11px;
  color: var(--cyan);
  font-weight: 400;
}

/* 快速發言列 */
.quick-post-bar {
  margin: 25px 0 15px;
  background: linear-gradient(135deg, rgba(14, 38, 65, 0.7), rgba(8, 21, 37, 0.8));
  border: 1px solid var(--border-cyan);
  border-radius: 12px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.quick-post-left {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #d1e7f6;
  font-size: 13.5px;
}

.quick-post-icon {
  font-size: 22px;
}

/* 篩選與搜尋欄 */
.filter-section {
  margin: 20px 0 30px;
  background: rgba(6, 18, 32, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 16px 20px;
  backdrop-filter: blur(10px);
}

.filter-row {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
}

.search-box {
  flex: 1 1 280px;
  position: relative;
}

.search-input {
  width: 100%;
  background: rgba(4, 14, 25, 0.9);
  border: 1px solid #2f5670;
  color: #fff;
  padding: 10px 14px 10px 38px;
  border-radius: 8px;
  font-size: 13px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 14px rgba(112, 228, 255, 0.3);
}

.search-icon-symbol {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
  font-size: 14px;
}

.filter-selects {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.select-control {
  background: rgba(4, 14, 25, 0.9);
  border: 1px solid #2f5670;
  color: #e2f2fc;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 12.5px;
}

.select-control:focus {
  outline: none;
  border-color: var(--cyan);
}

/* 頻道標籤切換列 */
.channel-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(73, 114, 138, 0.3);
}

.channel-btn {
  background: rgba(10, 27, 46, 0.6);
  border: 1px solid #284c66;
  color: #adc7d8;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.channel-btn:hover {
  background: #15395a;
  color: #fff;
  border-color: var(--cyan);
}

.channel-btn.active {
  background: var(--cyan);
  color: #03121f;
  border-color: var(--cyan);
  font-weight: 700;
  box-shadow: 0 0 12px rgba(112, 228, 255, 0.4);
}

/* 留言網格 */
.messages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
  margin-bottom: 50px;
}

/* 留言卡片 */
.msg-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  backdrop-filter: blur(12px);
}

.msg-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.6), 0 0 20px rgba(112, 228, 255, 0.15);
}

/* 置頂卡片特殊光暈 */
.msg-card.pinned {
  border-color: var(--gold);
  background: linear-gradient(180deg, rgba(23, 40, 28, 0.6) 0%, rgba(8, 24, 43, 0.9) 100%);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5), 0 0 25px rgba(255, 207, 86, 0.2);
}

.pinned-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  background: linear-gradient(135deg, #e6b422, #a87e08);
  color: #05101a;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 999px;
  box-shadow: 0 0 12px rgba(255, 207, 86, 0.5);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  letter-spacing: 0.05em;
}

.msg-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.sender-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sender-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #184166, #091a2b);
  border: 1px solid var(--border-cyan);
  display: grid;
  place-items: center;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(112, 228, 255, 0.25);
}

.sender-meta {
  min-width: 0;
}

.sender-name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.planet-tag {
  font-size: 11px;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.channel-tag {
  font-size: 10.5px;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(112, 228, 255, 0.1);
  border: 1px solid rgba(112, 228, 255, 0.3);
  color: var(--cyan);
  white-space: nowrap;
}

.channel-tag.announce { border-color: var(--gold); color: var(--gold); background: rgba(255, 207, 86, 0.1); }
.channel-tag.explore { border-color: var(--cyan); color: var(--cyan); background: rgba(112, 228, 255, 0.1); }
.channel-tag.combat { border-color: var(--danger); color: var(--danger); background: rgba(255, 107, 107, 0.1); }
.channel-tag.tech { border-color: var(--purple); color: var(--purple); background: rgba(185, 138, 255, 0.1); }
.channel-tag.sos { border-color: #ff922b; color: #ff922b; background: rgba(255, 146, 43, 0.1); }

.msg-body {
  font-size: 14px;
  line-height: 1.75;
  color: #dbeaf4;
  margin: 12px 0 16px;
  word-break: break-word;
  white-space: pre-wrap;
}

.msg-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: #7d9cb0;
  font-family: var(--font-mono);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(73, 114, 138, 0.25);
  margin-bottom: 12px;
}

.msg-footer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.btn-like {
  background: rgba(11, 33, 56, 0.7);
  border: 1px solid #2e5977;
  color: #cde7f7;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-like:hover {
  background: rgba(255, 207, 86, 0.15);
  border-color: var(--gold);
  color: var(--gold);
  transform: scale(1.05);
}

.btn-like.liked {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(255, 207, 86, 0.2);
}

.btn-toggle-replies {
  background: none;
  border: 1px solid transparent;
  color: #92b7ce;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all 0.2s;
}

.btn-toggle-replies:hover {
  color: var(--cyan);
  background: rgba(112, 228, 255, 0.08);
}

/* 回覆抽屜區塊 */
.replies-wrap {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed rgba(73, 114, 138, 0.3);
  display: none;
}

.replies-wrap.open {
  display: block;
}

.reply-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.reply-item {
  background: rgba(4, 14, 25, 0.85);
  border-left: 2px solid var(--cyan);
  padding: 8px 12px;
  border-radius: 0 6px 6px 0;
  font-size: 12.5px;
}

.reply-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
}

.reply-sender {
  color: #fff;
  font-weight: 700;
}

.reply-form {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.reply-input {
  flex: 1 1 200px;
  background: rgba(3, 11, 20, 0.9);
  border: 1px solid #2a4c66;
  color: #fff;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 12px;
}

.reply-input:focus {
  outline: none;
  border-color: var(--cyan);
}

.btn-reply-send {
  background: #174e75;
  border: 1px solid var(--cyan);
  color: #fff;
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 12px;
  transition: all 0.2s;
}

.btn-reply-send:hover {
  background: #236c9e;
}

/* 發送新廣播模態對話框 */
.post-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(2, 7, 16, 0.85);
  backdrop-filter: blur(14px);
  display: grid;
  place-items: center;
  padding: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.post-modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.post-modal-box {
  width: min(640px, 100%);
  max-height: min(92vh, 850px);
  background: radial-gradient(circle at 50% 0%, rgba(112, 228, 255, 0.15), transparent 50%), linear-gradient(180deg, #091e35, #051221);
  border: 1px solid var(--cyan);
  border-radius: 16px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.85), 0 0 35px rgba(112, 228, 255, 0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.92) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.post-modal-overlay.open .post-modal-box {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(112, 228, 255, 0.25);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(3, 13, 24, 0.9);
}

.modal-title-wrap h3 {
  font-size: 20px;
  margin: 0;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-title-wrap small {
  font-size: 10px;
  font-family: var(--font-tech);
  color: var(--cyan);
  letter-spacing: 0.15em;
}

.btn-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid #3d637c;
  background: rgba(7, 23, 40, 0.8);
  color: #fff;
  font-size: 15px;
  display: grid;
  place-items: center;
  transition: all 0.2s;
}

.btn-modal-close:hover {
  background: var(--danger);
  border-color: var(--danger);
}

.modal-body {
  padding: 22px 24px;
  overflow-y: auto;
  font-size: 13.5px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #b5d5e9;
  margin-bottom: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-control {
  width: 100%;
  background: rgba(3, 13, 23, 0.85);
  border: 1px solid #2f5979;
  color: #fff;
  padding: 10px 12px;
  border-radius: 7px;
  font-size: 13px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(112, 228, 255, 0.3);
}

.textarea-control {
  min-height: 120px;
  resize: vertical;
  line-height: 1.7;
}

.char-counter {
  text-align: right;
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid rgba(112, 228, 255, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(3, 13, 24, 0.95);
}

.btn-submit-post {
  background: linear-gradient(135deg, #1b6da7, #0a3d62);
  border: 1px solid var(--cyan);
  color: #fff;
  padding: 10px 22px;
  border-radius: 7px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 0 16px rgba(112, 228, 255, 0.35);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-submit-post:hover {
  background: #2481bf;
  box-shadow: 0 0 25px rgba(112, 228, 255, 0.6);
  transform: translateY(-2px);
}

/* 狀態通知 Toast */
.pb-toast {
  position: fixed;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(6, 21, 38, 0.95);
  border: 1px solid var(--cyan);
  color: #eaf8ff;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 13.5px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7), 0 0 20px rgba(112, 228, 255, 0.3);
  z-index: 200;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.pb-toast.show {
  transform: translateX(-50%) translateY(0);
}

/* 頁尾 */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 30px 0 45px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.footer-links a:hover {
  color: #fff;
}

/* RWD 響應式佈局適應 */
@media (max-width: 820px) {
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .messages-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.btn-open-post) { display: none; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .stats-bar { grid-template-columns: 1fr; }
  .hero { padding: 30px 0 15px; }
  .quick-post-bar { flex-direction: column; align-items: stretch; text-align: center; }
  .quick-post-bar button { width: 100%; justify-content: center; }
}