/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --white:    #ffffff;
  --bg:       #f7f9f8;
  --bg-2:     #eef2f0;
  --surface:  #ffffff;
  --border:   #e2eae6;
  --border-2: #c8d9d2;

  --teal:     #0f9b77;
  --teal-2:   #0d8567;
  --teal-3:   #0a6e54;
  --teal-light: #e6f5f1;
  --teal-mid:   #b3dfd4;
  --teal-dim:   rgba(15,155,119,0.08);
  --teal-glow:  rgba(15,155,119,0.18);

  --text:     #0f1f1a;
  --text-2:   #3d5a52;
  --text-3:   #7a9e94;
  --text-inv: #ffffff;

  --danger:   #dc2626;
  --warning:  #d97706;
  --success:  #0f9b77;
  --info:     #2563eb;

  --font-sans:    -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-serif:   Georgia, 'Times New Roman', serif;
  --font-mono:    'Courier New', Courier, monospace;

  --nav-h:    68px;
  --sidebar-w:240px;
  --r:        8px;
  --rl:       14px;
  --rxl:      20px;
  --rf:       9999px;
  --t:        0.2s cubic-bezier(0.4,0,0.2,1);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.06), 0 2px 12px rgba(0,0,0,0.04);
  --shadow:     0 4px 20px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-teal:0 4px 24px rgba(15,155,119,0.2);
}

/* ─── Reset ──────────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:15px;scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}
input,textarea,select{font:inherit;color:inherit}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:var(--teal-mid);border-radius:4px}

/* ═══════════════════════════════════════════════════════════════════════════
   PUBLIC HOMEPAGE
═══════════════════════════════════════════════════════════════════════════ */

/* ── Navbar ── */
.navbar {
  height: var(--nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 5%;
  gap: 32px;
}
.navbar-brand {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  background-color: var(--teal);
  border-radius: 20px;
}
.navbar-logo-img { height: 36px; width: auto; object-fit: contain; }
.navbar-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.navbar-name { font-size: 1.1rem; font-weight: 800; color: var(--teal); letter-spacing: -0.01em; }
.navbar-sub  { font-size: 0.58rem; color: var(--text-3); letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--font-mono); }

.navbar-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-link {
  padding: 6px 14px;
  border-radius: var(--rf);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  transition: all var(--t);
}
.nav-link:hover { background: var(--teal-light); color: var(--teal); }
.nav-link.active { background: var(--teal-light); color: var(--teal); font-weight: 600; }

.navbar-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

/* ── Hero ── */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: 80px 5% 80px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #ffffff 0%, #f0f9f6 50%, #e6f5f0 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(15,155,119,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(15,155,119,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { max-width: 680px; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: var(--teal-light);
  border: 1px solid var(--teal-mid);
  border-radius: var(--rf);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  font-family: var(--font-mono);
}
.hero-badge span { width: 6px; height: 6px; background: var(--teal); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(0.8)} }

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.12;
  color: var(--text);
  margin-bottom: 8px;
}
.hero h1 em { color: var(--teal); font-style: italic; }
.hero-acronym {
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 20px;
  font-family: var(--font-mono);
}
.hero p {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 540px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 630px;
  height: 630px;
  opacity: 0.55;
  pointer-events: none;
}

/* ── Section base ── */
.section { padding: 88px 5%; }
.section-alt { background: var(--white); }
.section-dark { background: var(--text); }
.section-teal { background: var(--teal); }

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
  font-family: var(--font-mono);
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 48px;
}

/* ── Stats strip ── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--rl);
  overflow: hidden;
}
.stat-item {
  background: var(--white);
  padding: 28px 24px;
  text-align: center;
  transition: background var(--t);
}
.stat-item:hover { background: var(--teal-light); }
.stat-num {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-lbl { font-size: 0.78rem; color: var(--text-3); font-weight: 500; letter-spacing: 0.03em; }

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.about-tag {
  padding: 5px 14px;
  background: var(--teal-light);
  border: 1px solid var(--teal-mid);
  border-radius: var(--rf);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--teal);
}
.about-visual {
  background: linear-gradient(135deg, var(--teal-light) 0%, #daf0e9 100%);
  border-radius: var(--rxl);
  padding: 40px;
  border: 1px solid var(--teal-mid);
}
.about-visual h3 { font-family: var(--font-serif); font-size: 1.3rem; color: var(--teal-3); margin-bottom: 16px; }
.about-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.55;
}
.about-list li::before { content: '→'; color: var(--teal); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

/* ── Research topics ── */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.topic-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--rxl);
  padding: 36px;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.topic-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.topic-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--teal-mid); }
.topic-card:hover::before { transform: scaleX(1); }
.topic-icon {
  width: 56px; height: 56px;
  background: var(--teal-light);
  border-radius: var(--rl);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  border: 1px solid var(--teal-mid);
}
.topic-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.topic-card p { font-size: 0.875rem; color: var(--text-2); line-height: 1.7; }
.topic-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.topic-tag { padding: 3px 10px; background: var(--teal-light); border-radius: var(--rf); font-size: 0.72rem; font-weight: 600; color: var(--teal); font-family: var(--font-mono); }

/* ── Team ── */
.team-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.team-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--rxl);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--t);
}
.team-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--teal-mid); }
.team-avatar {
  width: 80px; height: 80px;
  border-radius: var(--rf);
  background: linear-gradient(135deg, var(--teal-light), #c8ede5);
  border: 2px solid var(--teal-mid);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--teal-3);
  margin: 0 auto 16px;
  overflow: hidden;
}
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-role-badge {
  display: inline-block;
  padding: 3px 10px;
  background: var(--teal-light);
  border-radius: var(--rf);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  margin-bottom: 8px;
}
.team-name { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.team-spec { font-size: 0.78rem; color: var(--text-3); line-height: 1.5; }
.team-links { display: flex; justify-content: center; gap: 8px; margin-top: 14px; }
.team-link {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--r);
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-3);
  transition: all var(--t);
}
.team-link:hover { background: var(--teal-light); color: var(--teal); border-color: var(--teal-mid); }

/* ── Publications list (public) ── */
.pub-list { display: flex; flex-direction: column; gap: 14px; }
.pub-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--rl);
  padding: 22px 24px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all var(--t);
}
.pub-card:hover { box-shadow: var(--shadow); border-color: var(--teal-mid); }
.pub-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--teal);
  background: var(--teal-light);
  border: 1px solid var(--teal-mid);
  border-radius: var(--r);
  padding: 4px 10px;
  white-space: nowrap;
  flex-shrink: 0;
  height: fit-content;
}
.pub-info { flex: 1; }
.pub-title { font-size: 0.95rem; font-weight: 700; color: var(--text); line-height: 1.45; margin-bottom: 6px; }
.pub-authors { font-size: 0.8rem; color: var(--text-2); margin-bottom: 6px; }
.pub-venue { font-size: 0.78rem; color: var(--text-3); font-style: italic; margin-bottom: 8px; }
.pub-lock {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  color: var(--text-3);
  padding: 3px 10px;
  border-radius: var(--rf);
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 24px;
}
.contact-icon {
  width: 42px; height: 42px;
  background: var(--teal-light);
  border: 1px solid var(--teal-mid);
  border-radius: var(--rl);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  color: var(--teal);
}
.contact-label { font-size: 0.72rem; font-weight: 700; color: var(--teal); letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 3px; font-family: var(--font-mono); }
.contact-value { font-size: 0.875rem; color: var(--text-2); line-height: 1.55; }

/* ── Footer ── */
footer {
  background: var(--text);
  color: rgba(255,255,255,0.5);
  padding: 40px 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
}
footer .footer-brand { font-weight: 700; color: rgba(255,255,255,0.9); font-size: 0.9rem; }
footer .footer-brand span { color: var(--teal); }

/* ═══════════════════════════════════════════════════════════════════════════
   SHARED BUTTONS
═══════════════════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 22px; border-radius: var(--rf);
  font-size: 0.9rem; font-weight: 600; font-family: var(--font-sans);
  transition: all var(--t); white-space: nowrap; cursor: pointer;
}
.btn-primary   { background: var(--teal); color: #fff; border: 1.5px solid var(--teal); }
.btn-primary:hover { background: var(--teal-2); border-color: var(--teal-2); transform: translateY(-1px); box-shadow: var(--shadow-teal); }
.btn-outline   { background: transparent; border: 1.5px solid var(--border-2); color: var(--text-2); }
.btn-outline:hover { border-color: var(--teal); color: var(--teal); background: var(--teal-dim); }
.btn-ghost     { background: transparent; border: 1.5px solid rgba(255,255,255,0.25); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); }
.btn-danger    { background: rgba(220,38,38,0.08); color: var(--danger); border: 1.5px solid rgba(220,38,38,0.2); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm        { padding: 6px 14px; font-size: 0.82rem; }
.btn-icon      { padding: 8px; border-radius: var(--r); background: var(--bg-2); color: var(--text-2); border: 1px solid var(--border); }
.btn-icon:hover { background: var(--teal-light); color: var(--teal); border-color: var(--teal-mid); }
.w-full { width: 100%; justify-content: center; }

/* ═══════════════════════════════════════════════════════════════════════════
   AUTH MODAL
═══════════════════════════════════════════════════════════════════════════ */
.auth-overlay {
  position: fixed; inset: 0;
  background: rgba(15,31,26,0.6);
  backdrop-filter: blur(8px);
  z-index: 500;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.auth-overlay.open { display: flex; }
.auth-box {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--rxl);
  padding: 40px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: popIn 0.22s ease;
}
@keyframes popIn { from{opacity:0;transform:scale(.95) translateY(10px)} to{opacity:1;transform:none} }
.auth-box-header { text-align: center; margin-bottom: 28px; }
.auth-box-logo { width: 52px; height: 52px; background: var(--teal-light); border: 1.5px solid var(--teal-mid); border-radius: var(--rl); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin: 0 auto 14px; }
.auth-box h2 { font-family: var(--font-serif); font-size: 1.5rem; color: var(--text); margin-bottom: 4px; }
.auth-box p { font-size: 0.82rem; color: var(--text-3); }
.auth-tabs { display: flex; background: var(--bg-2); border-radius: var(--rf); padding: 3px; margin-bottom: 22px; gap: 2px; }
.auth-tab { flex: 1; padding: 8px; border-radius: var(--rf); font-size: 0.82rem; font-weight: 600; color: var(--text-2); transition: all var(--t); text-align: center; }
.auth-tab.active { background: var(--white); color: var(--teal); box-shadow: var(--shadow-sm); }

/* ═══════════════════════════════════════════════════════════════════════════
   DASHBOARD APP (post-login, sidebar layout)
═══════════════════════════════════════════════════════════════════════════ */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.sidebar-logo { padding: 14px; border-bottom: 1px solid var(--border); }
.sidebar-brand { display: flex; align-items: center; background-color: var(--teal);
  border-radius: 20px; justify-content: center;}
.sidebar-brand-name { font-size: 1rem; font-weight: 800; color: var(--teal); letter-spacing: 0.01em; }
.sidebar-brand-sub { font-size: 0.58rem; color: var(--text-3); font-family: var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; }

.sidebar-nav { flex: 1; padding: 10px 10px; overflow-y: auto; }
.snav-label { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); padding: 14px 10px 4px; font-family: var(--font-mono); }
.snav-item {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 12px; border-radius: var(--r);
  color: var(--text-2); font-size: 0.875rem; font-weight: 500;
  transition: all var(--t); margin-bottom: 1px;
  border: 1px solid transparent; cursor: pointer;
}
.snav-item:hover { background: var(--teal-light); color: var(--teal); }
.snav-item.active { background: var(--teal-light); color: var(--teal); border-color: var(--teal-mid); font-weight: 600; }
.snav-item .icon { font-size: 0.95rem; width: 18px; text-align: center; flex-shrink: 0; }

.sidebar-footer { padding: 10px; border-top: 1px solid var(--border); }
.user-chip {
  display: flex; align-items: center; gap: 9px; padding: 9px 11px;
  border-radius: var(--r); background: var(--bg); cursor: pointer;
  transition: all var(--t); border: 1px solid var(--border);
}
.user-chip:hover { border-color: var(--teal-mid); background: var(--teal-light); }
.avatar {
  width: 30px; height: 30px; border-radius: var(--rf);
  background: var(--teal-light); border: 1.5px solid var(--teal-mid);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem; color: var(--teal); flex-shrink: 0;
}
.user-name { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.user-role { font-size: 0.65rem; color: var(--teal); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.04em; }

.app-main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.app-topbar {
  height: 60px; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); display: flex; align-items: center;
  padding: 0 22px; gap: 14px; position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow-sm);
}
.app-topbar-title { font-weight: 700; font-size: 1rem; flex: 1; color: var(--text); }
.search-box {
  display: flex; align-items: center; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--rf); padding: 7px 14px; gap: 8px; width: 280px;
  transition: all var(--t);
}
.search-box:focus-within { border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-dim); }
.search-box input { background: none; border: none; outline: none; flex: 1; font-size: 0.82rem; color: var(--text); }
.search-box input::placeholder { color: var(--text-3); }

/* ── App Pages ── */
.app-page { padding: 24px; flex: 1; display: none; }
.app-page.active { display: block; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.page-title { font-family: var(--font-sans); font-size: 1.6rem; font-weight: 800; color: var(--text); line-height: 1.2; letter-spacing: -0.02em; }
.page-subtitle { font-size: 0.82rem; color: var(--text-3); margin-top: 5px; }

/* ── Stat Cards (app) ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}
@media(max-width:1100px) { .stats-grid { grid-template-columns: repeat(3,1fr); } }
@media(max-width:600px)  { .stats-grid { grid-template-columns: repeat(2,1fr); } }

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--card-color, var(--teal));
  border-radius: var(--rl);
  padding: 20px 16px;
  text-align: center;
  transition: all var(--t);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.stat-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.08);
  transform: translateY(-3px);
  border-color: var(--card-color, var(--teal-mid));
  border-top-color: var(--card-color, var(--teal));
}
.stat-card-icon, .stat-icon {
  font-size: 1.6rem;
  margin-bottom: 6px;
  line-height: 1;
}
.stat-card-value, .stat-value {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--card-color, var(--teal));
  line-height: 1;
  letter-spacing: -0.02em;
  font-family: var(--font-sans);
}
.stat-card-label, .stat-label {
  font-size: 0.72rem;
  color: var(--text-3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* ── Cards grid (app) ── */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 14px; }
.card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--rl);
  padding: 18px; transition: all var(--t); cursor: pointer;
}
.card:hover { border-color: var(--teal-mid); box-shadow: var(--shadow); transform: translateY(-2px); }
.card-title { font-size: 0.95rem; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 6px; }
.card-body { font-size: 0.8rem; color: var(--text-2); line-height: 1.65; }
.card-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; flex-wrap: wrap; gap: 6px; }
.card-meta { font-size: 0.72rem; color: var(--text-3); font-family: var(--font-mono); }

/* ── Badges ── */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: var(--rf); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.04em; font-family: var(--font-mono); text-transform: uppercase; }
.badge-primary { background: var(--teal-light); color: var(--teal); border: 1px solid var(--teal-mid); }
.badge-warning { background: #fef3c7; color: var(--warning); border: 1px solid #fcd34d; }
.badge-danger  { background: #fee2e2; color: var(--danger); border: 1px solid #fca5a5; }
.badge-gray    { background: var(--bg-2); color: var(--text-2); border: 1px solid var(--border); }
.badge-info    { background: #dbeafe; color: var(--info); border: 1px solid #93c5fd; }
.badge-success { background: var(--teal-light); color: var(--teal); border: 1px solid var(--teal-mid); }
.badge-accent  { background: #d1fae5; color: #059669; border: 1px solid #6ee7b7; }

/* ── Forms ── */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 0.72rem; font-weight: 700; color: var(--text-2); margin-bottom: 5px; letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--font-mono); }
.form-control { width: 100%; padding: 9px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--r); color: var(--text); font-size: 0.875rem; outline: none; transition: all var(--t); }
.form-control:focus { border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-dim); background: var(--white); }
.form-control::placeholder { color: var(--text-3); }
textarea.form-control { resize: vertical; min-height: 85px; line-height: 1.6; }
select.form-control { cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ── Table ── */
.table-wrap { overflow-x: auto; border-radius: var(--rl); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
thead { background: var(--bg); }
th { padding: 10px 14px; text-align: left; font-size: 0.65rem; font-weight: 700; color: var(--text-2); letter-spacing: 0.08em; text-transform: uppercase; white-space: nowrap; font-family: var(--font-mono); }
td { padding: 11px 14px; border-top: 1px solid var(--border); color: var(--text); vertical-align: middle; }
tbody tr:hover { background: var(--teal-dim); }
.td-title { font-weight: 600; max-width: 280px; }
.td-title span { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ── Filters ── */
.filters-row { display: flex; align-items: center; gap: 7px; margin-bottom: 16px; flex-wrap: wrap; }
.filter-select { padding: 7px 10px; background: var(--white); border: 1px solid var(--border); border-radius: var(--r); color: var(--text-2); font-size: 0.78rem; outline: none; cursor: pointer; transition: all var(--t); }
.filter-select:focus { border-color: var(--teal); color: var(--text); }

/* ── Modal (app) ── */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,31,26,0.5); backdrop-filter: blur(5px); z-index: 200; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-backdrop.open { display: flex; }
.modal { background: var(--white); border: 1px solid var(--border); border-radius: var(--rxl); width: 100%; max-width: 620px; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-lg); animation: modalIn .2s ease; }
.modal-lg { max-width: 780px; }
@keyframes modalIn { from{opacity:0;transform:translateY(14px) scale(.97)} to{opacity:1;transform:none} }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px 14px; border-bottom: 1px solid var(--border); }
.modal-title { font-family: var(--font-serif); font-size: 1.1rem; color: var(--text); }
.modal-close { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; border-radius: var(--r); background: var(--bg-2); color: var(--text-3); font-size: 0.95rem; transition: all var(--t); border: 1px solid var(--border); }
.modal-close:hover { background: #fee2e2; color: var(--danger); border-color: #fca5a5; }
.modal-body { padding: 18px 22px; }
.modal-footer { padding: 14px 22px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* ── Detail ── */
.detail-label { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--teal); margin-bottom: 3px; font-family: var(--font-mono); }
.detail-value { font-size: 0.875rem; color: var(--text); line-height: 1.65; }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(170px,1fr)); gap: 16px; margin-top: 16px; }
.abstract-box { background: var(--teal-light); border-radius: var(--r); padding: 14px; font-size: 0.82rem; color: var(--text-2); line-height: 1.75; margin: 12px 0; border-left: 3px solid var(--teal); }

/* ── Upload ── */
.upload-zone { border: 2px dashed var(--border-2); border-radius: var(--rl); padding: 28px; text-align: center; cursor: pointer; transition: all var(--t); background: var(--bg); }
.upload-zone:hover,.upload-zone.dragover { border-color: var(--teal); background: var(--teal-light); }
.upload-zone .upload-icon { font-size: 2rem; margin-bottom: 9px; color: var(--teal); }
.upload-zone p { color: var(--text-2); font-size: 0.82rem; }
.upload-zone strong { color: var(--teal); }

/* ── File list ── */
.file-list { display: flex; flex-direction: column; gap: 6px; }
.file-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px; background: var(--bg); border-radius: var(--r); border: 1px solid var(--border); }
.file-name { font-size: 0.8rem; font-weight: 600; flex: 1; font-family: var(--font-mono); color: var(--text); }
.file-size { font-size: 0.7rem; color: var(--text-3); font-family: var(--font-mono); }

/* ── Members (app) ── */
.member-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(170px,1fr)); gap: 13px; }
.member-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--rl); padding: 18px 13px; text-align: center; transition: all var(--t); }
.member-card:hover { border-color: var(--teal-mid); transform: translateY(-2px); box-shadow: var(--shadow); }
.member-avatar { width: 60px; height: 60px; border-radius: var(--rf); background: var(--teal-light); border: 2px solid var(--teal-mid); display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 1.4rem; color: var(--teal-3); margin: 0 auto 11px; overflow: hidden; }
.member-avatar img { width: 100%; height: 100%; object-fit: cover; }
.member-name { font-size: 0.88rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.member-role { font-size: 0.65rem; color: var(--teal); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }

/* ── Toast ── */
#toast-container { position: fixed; bottom: 18px; right: 18px; z-index: 999; display: flex; flex-direction: column; gap: 7px; }
.toast { padding: 10px 16px; border-radius: var(--r); font-size: 0.82rem; font-weight: 500; border-left: 3px solid; background: var(--white); box-shadow: var(--shadow); animation: toastIn .22s ease; max-width: 300px; border-top: 1px solid var(--border); border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
@keyframes toastIn { from{opacity:0;transform:translateX(12px)} to{opacity:1;transform:none} }
.toast-success { border-left-color: var(--teal); }
.toast-error   { border-left-color: var(--danger); }
.toast-info    { border-left-color: var(--info); }

/* ── Empty ── */
.empty-state { text-align: center; padding: 52px 20px; }
.empty-state .empty-icon { font-size: 2.2rem; margin-bottom: 12px; opacity: .5; }
.empty-state h3 { font-family: var(--font-serif); font-size: 1.2rem; color: var(--text-2); margin-bottom: 6px; }
.empty-state p { font-size: 0.82rem; color: var(--text-3); font-family: var(--font-mono); }

/* ── Loading ── */
.loading-spinner { display: inline-block; width: 18px; height: 18px; border: 2px solid var(--border); border-top-color: var(--teal); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to{transform:rotate(360deg)} }
.loading-overlay { display: flex; align-items: center; justify-content: center; padding: 52px; }

/* ── Pagination ── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 4px; margin-top: 22px; }
.page-btn { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: var(--r); border: 1px solid var(--border); background: var(--white); color: var(--text-2); font-size: 0.78rem; font-weight: 600; transition: all var(--t); }
.page-btn:hover,.page-btn.active { background: var(--teal); border-color: var(--teal); color: #fff; }
.page-btn:disabled { opacity: .3; cursor: not-allowed; }

/* ── Responsive ── */
@media(max-width:900px) {
  .hero { flex-direction: column; }
  .hero-visual { display: none; }
  .about-grid,.contact-grid,.topics-grid { grid-template-columns: 1fr; }
}
@media(max-width:768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .app-main { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .app-page { padding: 14px; }
  .navbar-links { display: none; }
  .topics-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Misc ── */
.text-mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-2); }
.text-dim { color: var(--text-3); }
.text-teal { color: var(--teal); }
.mt-1{margin-top:6px}.mt-2{margin-top:12px}.mt-3{margin-top:20px}
.mb-1{margin-bottom:6px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:20px}
.flex{display:flex}.flex-center{display:flex;align-items:center}
.gap-1{gap:6px}.gap-2{gap:12px}.ml-auto{margin-left:auto}