/* ============================================================
   Kalviyogi marketing — landing + glass auth
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700;9..144,800&family=Sora:wght@400;500;600;700&display=swap');

:root {
  --m-ink: #0f1c2e;
  --m-ink-2: #2a3d55;
  --m-muted: #6b7c93;
  --m-paper: #f3f0e8;
  --m-sand: #e8e2d4;
  --m-teal: #0d9488;
  --m-teal-deep: #0f766e;
  --m-gold: #c4a35a;
  --m-glass: rgba(255, 255, 255, 0.14);
  --m-glass-strong: rgba(255, 255, 255, 0.55);
  --m-line: rgba(255, 255, 255, 0.22);
  --m-font: 'Sora', system-ui, sans-serif;
  --m-display: 'Fraunces', Georgia, serif;
}

/* ---------- shared page shell ---------- */
.m-body {
  margin: 0;
  font-family: var(--m-font);
  color: var(--m-ink);
  background: var(--m-paper);
  -webkit-font-smoothing: antialiased;
}
.m-body a { color: var(--m-teal-deep); text-decoration: none; }
.m-body a:hover { text-decoration: underline; }

.m-wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

/* ---------- landing atmosphere ---------- */
.m-landing {
  min-height: 100vh;
  background:
    radial-gradient(900px 520px at 12% -10%, rgba(13, 148, 136, 0.18), transparent 55%),
    radial-gradient(800px 480px at 92% 8%, rgba(196, 163, 90, 0.16), transparent 50%),
    linear-gradient(180deg, #eef4f2 0%, var(--m-paper) 42%, #ebe6da 100%);
  overflow-x: hidden;
}

.m-landing::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(15, 28, 46, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 28, 46, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
}

/* ---------- nav ---------- */
.m-nav {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 10px;
  animation: m-fade-down 0.7s ease both;
}
.m-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none !important;
  color: inherit;
}
.m-brand img {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 10px 28px rgba(15, 28, 46, 0.12);
}
.m-brand-text strong {
  display: block;
  font-family: var(--m-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--m-ink);
}
.m-brand-text span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--m-muted);
  margin-top: 2px;
}
.m-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* ---------- buttons ---------- */
.m-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--m-font);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  white-space: nowrap;
}
.m-btn:hover { transform: translateY(-1px); }
.m-btn-primary {
  background: linear-gradient(135deg, var(--m-teal) 0%, var(--m-teal-deep) 100%);
  color: #fff !important;
  box-shadow: 0 10px 24px rgba(13, 148, 136, 0.28);
}
.m-btn-ghost {
  background: rgba(255, 255, 255, 0.55);
  border-color: rgba(15, 28, 46, 0.1);
  color: var(--m-ink-2) !important;
  backdrop-filter: blur(10px);
}
.m-btn-lg { padding: 14px 22px; font-size: 1rem; }

/* ---------- hero ---------- */
.m-hero {
  position: relative;
  z-index: 2;
  min-height: auto;
  display: grid;
  align-content: center;
  padding: 28px 0 36px;
  animation: m-fade-up 0.85s ease 0.08s both;
}
.m-hero-brand {
  font-family: var(--m-display);
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.95;
  color: var(--m-ink);
  margin: 0 0 18px;
}
.m-hero-brand em {
  font-style: normal;
  background: linear-gradient(120deg, var(--m-teal-deep), #1d4e89 55%, var(--m-gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.m-hero h2 {
  font-family: var(--m-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.25;
  color: var(--m-ink-2);
  margin: 0 0 12px;
  max-width: 22ch;
}
.m-hero p {
  margin: 0;
  max-width: 38ch;
  color: var(--m-muted);
  font-size: 1.05rem;
  line-height: 1.55;
}
.m-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.m-hero-visual {
  position: absolute;
  right: -4%;
  top: 12%;
  width: min(46vw, 520px);
  aspect-ratio: 4/5;
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(15, 28, 46, 0.88), rgba(13, 148, 136, 0.55)),
    url('../img/icons/icon-512.png') center 42%/62% no-repeat;
  box-shadow: 0 30px 80px rgba(15, 28, 46, 0.22);
  overflow: hidden;
  animation: m-float 7s ease-in-out infinite;
}
.m-hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 45%, rgba(15, 28, 46, 0.55) 100%),
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.18), transparent 45%);
}
.m-hero-visual span {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 28px;
  z-index: 1;
  color: #fff;
  font-family: var(--m-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

@media (max-width: 900px) {
  .m-hero-visual { display: none; }
  .m-hero { min-height: auto; padding-top: 36px; }
}

/* ---------- sections ---------- */
.m-section {
  position: relative;
  z-index: 2;
  padding: 72px 0;
}
.m-section h3 {
  font-family: var(--m-display);
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
  color: var(--m-ink);
}
.m-section .m-lead {
  margin: 0 0 28px;
  max-width: 52ch;
  color: var(--m-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}
.m-kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--m-teal-deep);
  margin-bottom: 10px;
}

.m-about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: stretch;
}
@media (max-width: 800px) {
  .m-about-grid { grid-template-columns: 1fr; }
}

.m-panel {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(15, 28, 46, 0.08);
  border-radius: 22px;
  padding: 28px 26px;
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 40px rgba(15, 28, 46, 0.05);
}
.m-panel p {
  margin: 0 0 14px;
  color: var(--m-ink-2);
  line-height: 1.65;
}
.m-panel p:last-child { margin-bottom: 0; }
.m-company {
  background:
    linear-gradient(155deg, rgba(15, 28, 46, 0.94), rgba(15, 92, 86, 0.88));
  color: #e8f3f1;
  border: none;
}
.m-company h4 {
  font-family: var(--m-display);
  font-size: 1.45rem;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.m-company p { color: rgba(232, 243, 241, 0.86); }
.m-company .m-kicker { color: var(--m-gold); }

/* ---------- features ---------- */
.m-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 800px) {
  .m-features { grid-template-columns: 1fr; }
}
.m-feature {
  padding: 22px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(15, 28, 46, 0.07);
}
.m-feature .ic {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(13, 148, 136, 0.12);
  color: var(--m-teal-deep);
  margin-bottom: 14px;
}
.m-feature strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--m-ink);
}
.m-feature span {
  display: block;
  color: var(--m-muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* ---------- books ---------- */
.m-books {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}
.m-book {
  display: block;
  text-decoration: none !important;
  color: inherit;
  transition: transform 0.2s ease;
}
.m-book:hover { transform: translateY(-4px); }
.m-book img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(15, 28, 46, 0.12);
  margin-bottom: 10px;
  background: #dfe7e4;
}
.m-section-books {
  padding-top: 36px;
}
.m-book-cat {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--m-teal-deep);
  margin: 0 0 4px;
}
.m-book strong {
  display: block;
  font-size: 0.92rem;
  line-height: 1.3;
}
.m-book small { color: var(--m-muted); font-size: 0.78rem; }

/* ---------- footer ---------- */
.m-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(15, 28, 46, 0.08);
  padding: 28px 0 40px;
  color: var(--m-muted);
  font-size: 0.88rem;
}
.m-footer strong { color: var(--m-ink-2); }
.m-footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
}

/* ---------- glass auth ---------- */
.glass-auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 18px;
  font-family: var(--m-font);
  color: #f4f7fb;
  background:
    radial-gradient(900px 520px at 15% 10%, rgba(13, 148, 136, 0.45), transparent 55%),
    radial-gradient(700px 480px at 90% 85%, rgba(196, 163, 90, 0.28), transparent 50%),
    linear-gradient(145deg, #0b1726 0%, #12353a 48%, #0f1c2e 100%);
  position: relative;
  overflow: hidden;
}
.glass-auth::before {
  content: '';
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 30% 40%, rgba(255,255,255,0.06) 0 1px, transparent 2px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,0.05) 0 1px, transparent 2px);
  background-size: 56px 56px, 72px 72px;
  animation: m-drift 28s linear infinite;
  pointer-events: none;
}
.glass-card {
  position: relative;
  z-index: 2;
  width: min(420px, 100%);
  padding: 32px 28px 28px;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(255,255,255,0.18), rgba(255,255,255,0.08));
  border: 1px solid var(--m-line);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255,255,255,0.25);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  animation: m-fade-up 0.65s ease both;
}
.glass-card .brand {
  flex-direction: column;
  text-align: center;
  justify-content: center;
  margin-bottom: 8px;
  gap: 10px;
}
.glass-card .brand-name {
  font-family: var(--m-display);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}
.glass-card .brand-sub {
  color: rgba(244, 247, 251, 0.72);
  font-size: 0.9rem;
  margin-top: 2px;
}
.glass-card img.brand-mark {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}
.glass-card label.field > span {
  color: rgba(244, 247, 251, 0.78);
}
.glass-card .input {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.22);
  color: #fff;
  border-radius: 12px;
}
.glass-card .input::placeholder { color: rgba(255,255,255,0.4); }
.glass-card .input:focus {
  border-color: rgba(13, 148, 136, 0.8);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.25);
  background: rgba(255, 255, 255, 0.14);
}
.glass-card .btn-primary {
  background: linear-gradient(135deg, var(--m-teal), var(--m-teal-deep));
  border: none;
  box-shadow: 0 12px 28px rgba(13, 148, 136, 0.35);
  border-radius: 12px;
  padding: 12px 16px;
}
.glass-card .muted,
.glass-card .small { color: rgba(244, 247, 251, 0.65) !important; }
.glass-card a { color: #9ee7df; }
.glass-card .flash {
  border-radius: 12px;
  backdrop-filter: blur(8px);
}
.glass-card .flash.err {
  background: rgba(255, 107, 122, 0.18);
  border: 1px solid rgba(255, 107, 122, 0.35);
  color: #ffd4d8;
}
.glass-meta {
  text-align: center;
  margin-top: 18px;
  font-size: 0.78rem;
  color: rgba(244, 247, 251, 0.5);
  letter-spacing: 0.02em;
}
.glass-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  color: rgba(244, 247, 251, 0.7) !important;
  font-size: 0.85rem;
  text-decoration: none !important;
}
.glass-back:hover { color: #fff !important; }

@keyframes m-fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes m-fade-down {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes m-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes m-drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-40px, 30px, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .m-hero, .m-nav, .glass-card, .m-hero-visual { animation: none !important; }
}