/* ─── Clawschools — educational site stylesheet ─── */

:root {
  --bg:        #0f1320;
  --bg-2:      #131830;
  --bg-3:      #1a2040;
  --surface:   rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --stroke:    rgba(255, 255, 255, 0.10);

  --ink:       #f5f7fb;
  --ink-dim:   #b3bdd1;
  --ink-mute:  #8893ad;

  --brand:     #5a8dee;          /* primary blue */
  --brand-2:   #7aa8ff;
  --accent:    #ffb45a;          /* warm orange */
  --good:      #4cd6a4;
  --rose:      #ff7c95;

  --max-w:     1180px;
  --r-sm:      8px;
  --r:         14px;
  --r-lg:      22px;

  --ease:      cubic-bezier(.2,.7,.2,1);
  --t-fast:    .18s;
  --t-med:     .28s;

  --shadow-1:  0 8px 30px rgba(8, 12, 30, 0.5);
  --shadow-2:  0 18px 60px rgba(8, 12, 30, 0.6);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink);
  background:
    radial-gradient(1100px 700px at 10% -10%, rgba(90, 141, 238, 0.18), transparent 60%),
    radial-gradient(900px 700px at 100% 10%, rgba(255, 180, 90, 0.10), transparent 65%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 70%, var(--bg-3) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.55;
}

img { max-width: 100%; display: block; }

/* ─── HEADER ─── */
.site-header {
  position: sticky;
  top: 12px;
  margin: 12px auto 0;
  max-width: var(--max-w);
  width: calc(100% - 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px 10px 18px;
  background: rgba(20, 25, 50, 0.62);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  box-shadow: var(--shadow-1);
  z-index: 50;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.01em;
}
.brand-mark {
  display: inline-grid; place-items: center;
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(90,141,238,0.45);
  font-size: 18px;
}
.brand-name { font-size: 1.05rem; }

.site-nav {
  display: flex;
  gap: 6px;
}
.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.site-nav a:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.nav-cta { padding: 10px 18px; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease);
}
.btn-primary {
  color: white;
  background: linear-gradient(180deg, var(--brand), #4775d5);
  box-shadow: 0 6px 24px rgba(90,141,238,0.35);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 32px rgba(90,141,238,0.55);
}
.btn-ghost {
  color: var(--ink);
  background: transparent;
  border-color: var(--stroke);
}
.btn-ghost:hover {
  background: var(--surface-2);
  border-color: rgba(255,255,255,0.18);
}

/* ─── HERO ─── */
.hero {
  position: relative;
  max-width: var(--max-w);
  margin: 60px auto 40px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  min-height: 460px;
}

.kicker {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(90, 141, 238, 0.12);
  border: 1px solid rgba(90, 141, 238, 0.25);
  color: var(--brand-2);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 18px;
}

.grad-text {
  background: linear-gradient(90deg, var(--brand-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lede {
  color: var(--ink-dim);
  font-size: 1.1rem;
  margin: 0 0 26px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}

.trust-row {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.trust-row > div {
  display: flex;
  flex-direction: column;
}
.trust-row strong {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.trust-row span {
  color: var(--ink-mute);
  font-size: 0.9rem;
}

.hero-art {
  position: relative;
  min-height: 360px;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: 0.85;
  animation: float 12s ease-in-out infinite;
}
.orb-1 {
  width: 220px; height: 220px;
  right: 6%; top: 8%;
  background: radial-gradient(circle at 30% 30%, #8db4ff, #4d75d2 60%, transparent 70%);
  box-shadow: 0 30px 80px rgba(90,141,238,0.35);
}
.orb-2 {
  width: 140px; height: 140px;
  left: 4%; top: 18%;
  background: radial-gradient(circle at 30% 30%, #ffd28b, #ff9d3a 60%, transparent 70%);
  animation-delay: -3s;
  box-shadow: 0 20px 60px rgba(255,157,58,0.30);
}
.orb-3 {
  width: 110px; height: 110px;
  right: 20%; bottom: 6%;
  background: radial-gradient(circle at 30% 30%, #9af5cf, #4cd6a4 60%, transparent 70%);
  animation-delay: -6s;
  box-shadow: 0 20px 50px rgba(76,214,164,0.25);
}
@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  50%      { transform: translateY(-20px) translateX(8px); }
}

/* ─── SECTIONS ─── */
.section {
  max-width: var(--max-w);
  margin: 80px auto;
  padding: 0 24px;
}
.section-head {
  text-align: center;
  margin-bottom: 36px;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  font-weight: 800;
}
.section-head p {
  color: var(--ink-dim);
  margin: 0;
  max-width: 620px;
  margin-inline: auto;
}

/* ─── SUBJECTS ─── */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.subject-card {
  display: block;
  padding: 24px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--stroke);
  text-decoration: none;
  color: inherit;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease);
}
.subject-card:hover {
  transform: translateY(-2px);
  background: var(--surface-2);
  border-color: rgba(122, 168, 255, 0.30);
  box-shadow: var(--shadow-1);
}
.subject-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(90,141,238,0.20), rgba(122,168,255,0.10));
  border: 1px solid rgba(122,168,255,0.30);
  font-size: 22px;
  margin-bottom: 14px;
}
.subject-card h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  font-weight: 700;
}
.subject-card p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.95rem;
}

/* ─── COURSES ─── */
.course-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.course-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.course-card:hover {
  transform: translateY(-2px);
  border-color: rgba(122,168,255,0.30);
  box-shadow: var(--shadow-1);
}
.course-cover {
  height: 130px;
  display: grid; place-items: center;
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.c-math { background: linear-gradient(135deg, #4f6dd1, #7aa8ff); }
.c-cs   { background: linear-gradient(135deg, #2f8f7e, #4cd6a4); color: #06311d; }
.c-bio  { background: linear-gradient(135deg, #b14d80, #ff7c95); }
.c-lang { background: linear-gradient(135deg, #c08a3a, #ffb45a); color: #2a1900; }
.course-body { padding: 18px; }
.course-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--surface-2);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--ink-dim);
  margin-bottom: 10px;
}
.course-body h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  line-height: 1.3;
  font-weight: 700;
}
.course-body p {
  margin: 0 0 12px;
  color: var(--ink-dim);
  font-size: 0.92rem;
}
.course-meta {
  display: flex;
  gap: 6px;
  color: var(--ink-mute);
  font-size: 0.85rem;
}

/* ─── CTA BAND ─── */
.cta-band {
  padding: 0 24px;
}
.cta-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 50px 30px;
  text-align: center;
  border-radius: var(--r-lg);
  background:
    radial-gradient(600px 200px at 50% 0%, rgba(255,180,90,0.20), transparent 70%),
    linear-gradient(135deg, rgba(90,141,238,0.18), rgba(122,168,255,0.06));
  border: 1px solid var(--stroke);
}
.cta-inner h2 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.01em;
}
.cta-inner p {
  color: var(--ink-dim);
  margin: 0 0 22px;
}

/* ─── FOOTER ─── */
.site-footer {
  max-width: var(--max-w);
  margin: 60px auto 40px;
  padding: 30px 24px;
  border-top: 1px solid var(--stroke);
}
.footer-cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 22px;
}
.footer-cols strong { display: block; margin-bottom: 8px; }
.footer-cols p { color: var(--ink-dim); margin: 0; max-width: 280px; }
.footer-cols ul { list-style: none; padding: 0; margin: 0; }
.footer-cols ul li { margin: 4px 0; }
.footer-cols a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
.footer-cols a:hover { color: var(--ink); }
.footer-base {
  color: var(--ink-mute);
  font-size: 0.88rem;
  border-top: 1px solid var(--stroke);
  padding-top: 18px;
}

/* ─── SECONDARY PAGES (about, contact, courses) ─── */
.page-hero {
  max-width: var(--max-w);
  margin: 60px auto 30px;
  padding: 0 24px;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.page-hero p {
  color: var(--ink-dim);
  margin: 0;
  max-width: 720px;
  font-size: 1.05rem;
}

.prose {
  max-width: 760px;
  margin: 30px auto 0;
  padding: 0 24px;
}
.prose p,
.prose ul {
  color: var(--ink-dim);
  font-size: 1.02rem;
}
.prose h2 {
  margin-top: 36px;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}
.prose ul { padding-left: 20px; }

/* contact form */
.form-card {
  max-width: 540px;
  margin: 30px auto 0;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
}
.form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-row label { font-size: 0.92rem; color: var(--ink-dim); }
.form-row input,
.form-row textarea {
  font: inherit;
  color: var(--ink);
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--stroke);
  border-radius: var(--r);
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(90,141,238,0.20);
}
.form-row textarea { min-height: 130px; resize: vertical; }

/* course list (full page) */
.courses-page-grid {
  max-width: var(--max-w);
  margin: 40px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.cat-anchor {
  grid-column: 1 / -1;
  margin-top: 30px;
  margin-bottom: 0;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  scroll-margin-top: 90px;
}
.cat-anchor:first-child { margin-top: 0; }

/* ─── RESPONSIVE ─── */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .subject-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .courses-page-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .site-header { flex-wrap: wrap; gap: 8px; padding: 8px 12px; border-radius: 18px; }
  .site-nav { order: 3; width: 100%; justify-content: center; }
  .nav-cta { padding: 8px 14px; }
  .subject-grid,
  .course-grid,
  .courses-page-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  .trust-row { gap: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}