/* Lab B4 — Apple-inspired aesthetic */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --bg-light: #ffffff;
  --bg-gray: #f5f5f7;
  --bg-dark: #000000;
  --border: #d2d2d7;
  --nav-dark: #1d1d1f;
  --radius: 12px;
  --radius-lg: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

html, body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.47059;
  font-weight: 400;
  font-size: 17px;
  letter-spacing: -0.022em;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============ TOP NAV (Apple style) ============ */
.topnav {
  position: fixed; top: 0; left: 0; right: 0;
  height: 44px;
  background: rgba(29, 29, 31, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.topnav-inner {
  max-width: 980px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  color: #f5f5f7; text-decoration: none;
}
.brand-mark {
  width: 24px; height: 24px;
  background: #7B00FF; color: #fff;
  border-radius: 6px;
  font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.brand-name { font-size: 13px; font-weight: 500; letter-spacing: -0.01em; }
.nav-links {
  display: flex; gap: 28px; list-style: none;
}
.nav-links a {
  color: #f5f5f7; font-size: 12px; opacity: 0.88;
  letter-spacing: -0.01em; transition: opacity .2s;
  text-decoration: none;
}
.nav-links a:hover { opacity: 1; }
.nav-logout {
  background: transparent; border: none; color: #f5f5f7;
  font-size: 12px; cursor: pointer; opacity: 0.88;
  font-family: var(--font);
}
.nav-logout:hover { opacity: 1; }

/* ============ LOGIN ============ */
.login-hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
  padding: 20px;
}
.login-card {
  width: 100%; max-width: 380px;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.login-mark {
  width: 56px; height: 56px;
  background: #7B00FF; color: #fff;
  border-radius: 14px;
  font-weight: 800; font-size: 22px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.login-card h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.003em;
  color: var(--text);
}
.login-sub {
  color: var(--text-muted);
  font-size: 17px;
  margin: 8px 0 32px;
}
.login-form { display: flex; flex-direction: column; gap: 12px; }
.login-form input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font);
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.login-form input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0,113,227,0.15);
}
.login-err {
  color: #e30000;
  font-size: 13px;
  min-height: 18px;
  text-align: left;
}

/* ============ BUTTONS (Apple style pill) ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 400;
  font-family: var(--font);
  cursor: pointer;
  transition: background .2s, border-color .2s, color .2s, transform .1s;
  border: 1px solid transparent;
  min-width: 28px;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.btn-primary:hover:not(:disabled) { background: var(--blue-hover); border-color: var(--blue-hover); text-decoration: none; }
.btn-outline {
  background: transparent;
  color: var(--blue);
  border: 1px solid var(--blue);
}
.btn-outline:hover:not(:disabled) { background: rgba(0,113,227,0.08); text-decoration: none; }
.cta-row {
  display: flex; gap: 16px; justify-content: center;
  margin-top: 24px; flex-wrap: wrap;
}

/* ============ HERO ============ */
.hero {
  padding: 120px 22px 80px;
  text-align: center;
  background: var(--bg-light);
}
.hero-eyebrow, .section-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: none;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.hero-title {
  font-size: 80px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 12px;
}
.hero-sub {
  font-size: 28px;
  font-weight: 400;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
  letter-spacing: 0;
  line-height: 1.2;
}

/* Status cards under hero */
.hero-visual { margin-top: 60px; }
.status-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
}
.status-card {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: left;
  transition: transform .2s;
}
.status-card:hover { transform: translateY(-2px); }
.status-card .label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.status-card .value {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.status-card .meta {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ============ SECTIONS ============ */
.section {
  padding: 100px 22px;
  text-align: center;
}
.section-light { background: var(--bg-light); }
.section-gray  { background: var(--bg-gray); }
.section-dark  { background: var(--bg-dark); color: #f5f5f7; }
.section-dark .section-title { color: #fff; }
.section-dark .section-sub   { color: #a1a1a6; }
.section-dark .section-eyebrow { color: #86868b; }
.section-title {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.07;
  color: var(--text);
  margin-bottom: 12px;
}
.section-sub {
  font-size: 24px;
  font-weight: 400;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.25;
}

/* ============ MODULE GRID ============ */
.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 60px auto 0;
}
.module-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: left;
  transition: transform .2s, box-shadow .2s;
  cursor: pointer;
}
.section-gray .module-card { background: #fff; border-color: transparent; }
.section-dark .module-card {
  background: #1d1d1f;
  border-color: #2c2c2e;
  color: #f5f5f7;
}
.module-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
.module-card .mod-eyebrow {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 10px;
}
.module-card .mod-title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--text);
}
.section-dark .module-card .mod-title { color: #fff; }
.module-card .mod-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}
.mod-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 980px;
  font-weight: 500;
}
.mod-status.pending     { background: #f5f5f7; color: #6e6e73; }
.mod-status.in_progress { background: #fff4cd; color: #8c6d00; }
.mod-status.completed   { background: #d4edda; color: #0f5132; }
.section-dark .mod-status.pending { background: #2c2c2e; color: #a1a1a6; }

/* ============ SESSIONS ============ */
.session-list {
  max-width: 820px;
  margin: 60px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.session-item {
  background: #1d1d1f;
  border: 1px solid #2c2c2e;
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  text-align: left;
}
.session-item .s-date { font-size: 13px; color: #86868b; margin-bottom: 6px; }
.session-item .s-title { font-size: 22px; font-weight: 600; color: #fff; margin-bottom: 10px; letter-spacing: -0.01em; }
.session-item .s-block { margin-top: 12px; }
.session-item .s-block-label { font-size: 12px; color: #86868b; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.session-item .s-block-body { font-size: 15px; color: #d1d1d6; line-height: 1.5; white-space: pre-wrap; }
.session-empty { color: #86868b; font-size: 15px; max-width: 560px; margin: 60px auto 0; }

/* ============ FOOTER ============ */
.lab-footer {
  padding: 40px 22px;
  text-align: center;
  background: #000;
  color: #6e6e73;
  font-size: 12px;
}

/* ============ MODAL ============ */
.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 2000;
  padding: 20px;
}
.modal-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  width: 100%;
  max-width: 520px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal-card h3 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.modal-card input, .modal-card textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font);
  margin-bottom: 12px;
  resize: vertical;
}
.modal-card textarea { min-height: 72px; }
.modal-card input:focus, .modal-card textarea:focus {
  outline: none; border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0,113,227,0.15);
}
.modal-actions {
  display: flex; justify-content: flex-end; gap: 10px;
  margin-top: 10px;
}

/* ============ PROJECTS LIST ============ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.project-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: left;
  position: relative;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  border: 1px solid transparent;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.1);
}
.project-card .urgency-tag {
  position: absolute;
  top: 18px; right: 18px;
  background: #ff3b30;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 980px;
  letter-spacing: -0.01em;
}
.project-card .p-eyebrow {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 12px;
}
.project-card .p-name {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.1;
}
.project-card .p-tagline {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 20px;
  min-height: 44px;
}
.project-card .p-meta {
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* ============ PROJECT DETAIL ============ */
.hero-project { padding: 140px 22px 60px; }

.briefing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 60px auto 0;
  text-align: left;
}
.brief-card {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}
.brief-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 10px;
}
.brief-body {
  font-size: 15px;
  color: var(--text);
  line-height: 1.55;
  white-space: pre-wrap;
}

.asset-list {
  max-width: 860px;
  margin: 50px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}
.asset-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  border: 1px solid var(--border);
}
.asset-card.pinned { border-color: #ffc400; border-width: 2px; }
.asset-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.asset-kind {
  font-size: 11px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.08em;
}
.asset-del {
  background: transparent;
  border: none;
  color: #c8c8cd;
  font-size: 22px;
  cursor: pointer;
  padding: 0 6px;
  line-height: 1;
}
.asset-del:hover { color: #ff3b30; }
.asset-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.asset-body {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.55;
  white-space: pre-wrap;
}

/* ============ AI LOG ============ */
.ai-log {
  max-width: 820px;
  margin: 50px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}
.ai-log-item {
  background: #1d1d1f;
  border: 1px solid #2c2c2e;
  border-radius: var(--radius-lg);
  padding: 24px 28px;
}
.ai-log-date {
  font-size: 12px;
  color: #86868b;
  margin-bottom: 10px;
}
.ai-log-q {
  font-size: 15px;
  color: #c8c8cd;
  margin-bottom: 14px;
  font-style: italic;
}
.ai-log-a {
  font-size: 15px;
  color: #f5f5f7;
  line-height: 1.6;
}

/* ============ AI MODAL ============ */
.modal-card-lg { max-width: 720px; }
.modal-sub { color: var(--text-muted); font-size: 14px; margin: -10px 0 16px; }
.modal-select, .modal-check {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--text-muted);
}
.modal-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 15px;
  background: #fff;
  color: var(--text);
}
.ai-answer { margin-top: 20px; }
.ai-loading {
  background: var(--bg-gray);
  border-radius: var(--radius);
  padding: 16px;
  color: var(--text-muted);
  text-align: center;
  font-size: 14px;
}
.ai-response {
  background: var(--bg-gray);
  border-radius: var(--radius);
  padding: 20px;
  text-align: left;
}
.ai-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 10px;
}
.ai-text {
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}
.ai-err {
  background: #ffebee;
  color: #c62828;
  border-radius: var(--radius);
  padding: 14px;
  font-size: 14px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 820px) {
  .hero-title { font-size: 48px; }
  .hero-sub, .section-sub { font-size: 20px; }
  .section-title { font-size: 40px; }
  .status-cards, .module-grid, .project-grid, .briefing-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding: 90px 22px 60px; }
  .section { padding: 70px 22px; }
}