/* ==========================================================================
   FEYZ DIGITAL — Ortak Stil Sayfası
   Tasarım dili: "Sıcak Otorite"
   Tipografi: Fraunces (serif başlık) + Inter (sans gövde)
   ========================================================================== */

/* ---------- 1. CSS Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-ink);
  background: var(--color-cream);
}

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

a {
  color: inherit;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 2. Tasarım Sistemi (CSS Değişkenleri) ---------- */
:root {
  /* Renkler */
  --color-cream: #F5F1EA;          /* Ana zemin */
  --color-cream-deep: #EDE6DA;     /* Bölüm ayırıcı koyu krem */
  --color-ink: #1A1F1A;            /* Birincil metin (yeşilimsi siyah) */
  --color-ink-soft: #3A3A35;       /* İkincil metin */
  --color-ink-mute: #4A4A45;       /* Üçüncül metin */
  --color-mute: #888;              /* Etiket / küçük metin */
  --color-mute-soft: #B0B0AC;      /* Çok soluk metin */
  --color-clay: #B85C3C;           /* Vurgu — toprak/terracotta */
  --color-stone: #D4CCC0;          /* Açık nötr — koyu zeminde metin */
  --color-line: rgba(26, 31, 26, 0.08);
  --color-line-soft: rgba(26, 31, 26, 0.12);
  --color-line-mid: rgba(26, 31, 26, 0.15);
  --color-line-dark: rgba(245, 241, 234, 0.12);

  /* Tipografi */
  --font-serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  /* Layout */
  --container-padding-x: 56px;
  --container-padding-x-mobile: 24px;
}

/* ---------- 3. Tipografi Yardımcı Sınıfları ---------- */
.serif {
  font-family: var(--font-serif);
}

.italic {
  font-style: italic;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
}

.eyebrow-line {
  width: 40px;
  height: 0.5px;
  background: var(--color-clay);
}

.eyebrow-text {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-clay);
}

.label-mute {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-mute);
}

/* ---------- 4. Navigasyon (Üst Menü) ---------- */
.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px var(--container-padding-x);
  border-bottom: 0.5px solid var(--color-line);
  background: var(--color-cream);
}

.nav-logo {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: -0.01em;
  font-style: italic;
  color: var(--color-ink);
  text-decoration: none;
}

.nav-logo .dot {
  color: var(--color-clay);
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 13px;
  letter-spacing: 0.02em;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-links a.is-active {
  color: var(--color-ink);
  font-weight: 500;
  border-bottom: 0.5px solid var(--color-ink);
  padding-bottom: 2px;
}

.nav-cta {
  font-size: 13px;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 1px;
  background: var(--color-ink);
  display: block;
}

/* ---------- 5. Bölüm Yapısı ---------- */
.section {
  padding: 96px var(--container-padding-x);
}

.section-cream-deep {
  background: var(--color-cream-deep);
  border-top: 0.5px solid var(--color-line);
}

.section-divider {
  border-top: 0.5px solid var(--color-line);
}

/* ---------- 6. Başlıklar ---------- */
.h-display {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 88px;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin: 0 0 40px;
}

.h1 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 80px;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin: 0 0 36px;
}

.h2 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin: 0 0 24px;
}

.h3 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 48px;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin: 0 0 24px;
}

/* ---------- 7. Butonlar ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.85;
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-cream);
}

.btn-secondary {
  background: var(--color-cream);
  color: var(--color-ink);
}

.btn-link {
  color: var(--color-ink);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 0.5px solid var(--color-ink);
  padding-bottom: 4px;
}

.btn-arrow {
  font-size: 16px;
}

/* ---------- 8. Alıntı Kutuları ---------- */
.pull-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 19px;
  line-height: 1.5;
  color: var(--color-ink);
  padding-left: 24px;
  border-left: 1.5px solid var(--color-clay);
}

.pull-quote-large {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 21px;
  line-height: 1.45;
  color: var(--color-ink);
  padding: 32px 36px;
  background: var(--color-cream-deep);
  border-left: 2px solid var(--color-clay);
}

/* ---------- 9. Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-stone);
  padding: 80px var(--container-padding-x) 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 56px;
  margin-bottom: 80px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 36px;
  letter-spacing: -0.02em;
  font-style: italic;
  color: var(--color-cream);
  margin-bottom: 24px;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--color-stone);
  max-width: 320px;
}

.footer-heading {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-mute);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
  line-height: 2;
}

.footer-links a {
  color: var(--color-stone);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-cream);
}

.footer-address {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-stone);
}

.footer-manifesto {
  padding: 32px 0;
  border-top: 0.5px solid var(--color-line-dark);
  border-bottom: 0.5px solid var(--color-line-dark);
  margin-bottom: 32px;
}

.footer-manifesto-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.footer-manifesto-item {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--color-cream);
  line-height: 1.4;
}

.footer-manifesto-numeral {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--color-clay);
  margin-bottom: 6px;
  display: block;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--color-mute);
}

.footer-bottom-links {
  display: flex;
  gap: 28px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-bottom-links a {
  color: var(--color-mute);
  text-decoration: none;
}

.footer-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-mute);
}

/* ---------- 10. Form Stilleri ---------- */
.form-field {
  display: flex;
  flex-direction: column;
}

.form-field label {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13px;
  color: var(--color-clay);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 14px 0;
  border: none;
  border-bottom: 0.5px solid rgba(26, 31, 26, 0.3);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-ink);
  outline: none;
  transition: border-color 0.2s ease;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-mute);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-bottom-color: var(--color-clay);
}

.form-field textarea {
  resize: vertical;
  line-height: 1.6;
  min-height: 80px;
}

.form-field select {
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%231A1F1A' stroke-width='1' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0 center;
  padding-right: 24px;
}

.form-help {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  color: var(--color-mute);
  margin-top: 8px;
}

/* ---------- 11. Yardımcı sınıflar ---------- */
.text-center { text-align: center; }
.text-right { text-align: right; }

.back-to-top { display: none; }

/* ==========================================================================
   RESPONSIVE — Mobil (≤768px)
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --container-padding-x: var(--container-padding-x-mobile);
  }

  .site-nav {
    padding: 14px 24px 12px;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
    background: rgba(245, 241, 234, 0.88);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    transition: background 0.3s ease, box-shadow 0.3s ease;
  }

  .site-nav.is-scrolled {
    box-shadow: 0 1px 8px rgba(26, 31, 26, 0.06);
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  /* Back to top button */
  .back-to-top {
    position: fixed;
    bottom: 28px;
    right: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(245, 241, 234, 0.9);
    border: 0.5px solid rgba(26, 31, 26, 0.12);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    z-index: 90;
    text-decoration: none;
    color: var(--color-ink);
  }

  .back-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .back-to-top:active {
    transform: scale(0.92);
  }

  .back-to-top svg {
    width: 14px;
    height: 14px;
  }

  .site-nav.is-open .nav-links {
    display: flex;
    flex-direction: column;
    order: 10;
    flex-basis: 100%;
    padding: 24px 0 16px;
    gap: 20px;
    border-top: 0.5px solid var(--color-line);
  }

  .site-nav.is-open .nav-links a {
    font-size: 15px;
  }

  .site-nav.is-open .nav-cta {
    display: inline-block;
    order: 11;
    flex-basis: 100%;
    padding: 16px 0 8px;
    border-top: 0.5px solid var(--color-line);
    font-size: 14px;
  }

  .nav-toggle span {
    transition: transform 0.25s ease;
  }

  .nav-toggle.is-open span:first-child {
    transform: rotate(45deg) translate(2px, 2px);
  }

  .nav-toggle.is-open span:last-child {
    transform: rotate(-45deg) translate(2px, -2px);
  }

  .nav-logo {
    font-size: 20px;
  }

  .section {
    padding: 48px 24px;
  }

  /* Tipografi mobilde küçülür */
  .h-display {
    font-size: 42px;
    margin-bottom: 24px;
  }

  .h1 {
    font-size: 38px;
    margin-bottom: 22px;
  }

  .h2 {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .h3 {
    font-size: 30px;
  }

  .eyebrow-line {
    width: 24px;
  }

  .eyebrow-text {
    font-size: 9px;
    letter-spacing: 0.16em;
  }

  /* Footer mobilde alt alta */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 40px;
  }

  .footer-logo {
    font-size: 28px;
  }

  .footer-manifesto-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Buton mobilde tam genişlik */
  .btn-primary {
    padding: 16px 24px;
    font-size: 13px;
  }

  /* Alıntı */
  .pull-quote {
    font-size: 15px;
    padding-left: 16px;
  }

  .pull-quote-large {
    font-size: 16px;
    padding: 24px 22px;
  }
}