/* =============================================================
   Ruvion Studio — paylaşılan temel stiller
   Nunito (marka fontu) + Learn Keep renk tokenları ile hizalı.
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,700;0,800;0,900&display=swap');

:root {
  /* Marka (Learn Keep tokenlarıyla birebir) */
  --green: #58CC02;
  --green-bright: #89E219;
  --green-shadow: #46A302;
  --teal: #1CB0F6;
  --sapphire: #1899D6;
  --amber: #FFC800;
  --coral: #FF4B4B;
  --lavender: #CE82FF;

  /* Kurumsal koyu zemin (studio ana sayfa) */
  --bg: #0E0F13;
  --bg-alt: #16181F;
  --surface: #1B1E27;
  --surface-2: #222634;
  --border: #2A2F3D;
  --text: #F4F5F7;
  --text-muted: #A2A8B8;
  --text-faint: #6C7386;

  --radius: 18px;
  --radius-lg: 26px;
  --maxw: 1120px;
  --font: 'Nunito', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-weight: 700;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

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

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--green-bright);
}

h1, h2, h3 { font-weight: 900; line-height: 1.12; letter-spacing: -0.02em; }
h1 { font-size: clamp(38px, 6vw, 68px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(20px, 2.4vw, 26px); }

.muted { color: var(--text-muted); font-weight: 700; }

/* --- Butonlar: tok, 3D katı gölge (Learn Keep tactile) --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.4px;
  padding: 15px 28px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  white-space: nowrap;            /* etiket iki satıra bölünmesin */
  transition: transform .08s ease, box-shadow .08s ease;
}
.btn-primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 5px 0 0 var(--green-shadow);
}
.btn-primary:hover { transform: translateY(1px); box-shadow: 0 4px 0 0 var(--green-shadow); }
.btn-primary:active { transform: translateY(5px); box-shadow: 0 0 0 0 var(--green-shadow); }
.btn-ghost {
  background: var(--surface-2);
  color: var(--text);
  box-shadow: 0 5px 0 0 var(--border);
}
.btn-ghost:hover { transform: translateY(1px); box-shadow: 0 4px 0 0 var(--border); }
.btn-ghost:active { transform: translateY(5px); box-shadow: 0 0 0 0 var(--border); }

/* --- Üst navigasyon --- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 15, 19, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 900; font-size: 19px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green), var(--teal));
  display: grid; place-items: center; color: #fff; font-weight: 900; font-size: 18px;
  box-shadow: 0 3px 0 0 var(--green-shadow);
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-weight: 800; color: var(--text-muted); font-size: 15px; transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { padding: 10px 20px; font-size: 14px; box-shadow: 0 4px 0 0 var(--green-shadow); flex: none; }
.nav-inner { gap: 12px; }
.brand { min-width: 0; }
/* CTA etiketi: geniş ekranda uzun, dar ekranda kısa sürüm */
.cta-short { display: none; }

/* --- Footer --- */
.footer { border-top: 1px solid var(--border); background: var(--bg-alt); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.footer h4 { font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-faint); margin-bottom: 16px; font-weight: 900; }
.footer a { display: block; color: var(--text-muted); font-weight: 700; padding: 5px 0; font-size: 15px; transition: color .15s; }
.footer a:hover { color: var(--green-bright); }
.footer-bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; color: var(--text-faint); font-size: 14px; font-weight: 700; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  /* Dar ekranda "Learn Keep'i Keşfet" sığmıyor → kısa etiket */
  .cta-full { display: none; }
  .cta-short { display: inline; }
}
@media (max-width: 420px) {
  .nav-cta { padding: 9px 14px; font-size: 13px; }
  .brand { font-size: 17px; }
  .footer-grid { gap: 28px; }
}