/* ==========================================================================
   BASE RESET, TYPOGRAPHY & LAYOUT UTILITIES — APPLE-INSPIRED CLARITY
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  background-color: var(--color-canvas-primary);
  color: var(--color-text-primary);
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  letter-spacing: -0.011em;
  color: var(--color-text-primary);
  background-color: var(--color-canvas-primary);
  /* `clip` (not `hidden`) prevents horizontal overflow without breaking position: sticky */
  overflow-x: clip;
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background-color: rgba(0, 113, 227, 0.18);
  color: #1D1D1F;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

img {
  font-style: italic;
  background-repeat: no-repeat;
  background-size: cover;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

ul,
ol {
  list-style: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  touch-action: manipulation;
}

:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 3px;
  border-radius: 6px;
}

/* --------------------------------------------------------------------------
   Typography Hierarchy — SF Pro–style semibold display, calm tracking
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.03em;
}

h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
}

h3 {
  font-size: var(--text-2xl);
  line-height: 1.18;
}

h4 {
  font-size: var(--text-xl);
  line-height: 1.25;
}

p {
  color: var(--color-text-secondary);
  line-height: 1.55;
  text-wrap: pretty;
}

/* Apple Signature Two-Tone Headline Contrast (replaces yellow highlighter strip) */
.text-highlight-yellow,
.apple-headline-muted {
  color: #86868B;
  background: none;
  padding: 0;
}

.text-gradient-dark {
  background: linear-gradient(135deg, #1D1D1F 0%, #434347 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   Container & Section Rhythm
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: max(22px, env(safe-area-inset-left));
  padding-right: max(22px, env(safe-area-inset-right));
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: max(22px, env(safe-area-inset-left));
  padding-right: max(22px, env(safe-area-inset-right));
}

.section-spacing {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
  position: relative;
}

.section-spacing-sm {
  padding-top: var(--section-py-sm);
  padding-bottom: var(--section-py-sm);
  position: relative;
}

.bg-subtle {
  background-color: var(--color-canvas-subtle);
}

.bg-canvas {
  background-color: var(--color-canvas-primary);
}

.bg-dark {
  background-color: var(--color-canvas-dark);
  color: var(--color-text-on-dark);
}

.bg-dark h1,
.bg-dark h2,
.bg-dark h3,
.bg-dark h4 {
  color: var(--color-text-on-dark);
}

.bg-dark p {
  color: var(--color-text-muted-on-dark);
}

/* Section Headers — Apple centers every section headline */
.section-header-block,
.section-header-centered {
  max-width: 780px;
  margin: 0 auto clamp(2.5rem, 5vw, 3.75rem);
  text-align: center;
}

.section-header-block .section-desc,
.section-header-centered .section-lead,
.section-header-centered .section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* Eyebrow label — plain semibold caption (no pill), like Apple product eyebrows */
.section-tag {
  display: inline-block;
  padding: 0;
  border: none;
  background: none;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.section-title {
  margin-bottom: 16px;
}

.section-desc,
.section-lead {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.5;
  max-width: 680px;
}

.section-link-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

/* Apple text link with chevron ("Daha fazla bilgi ›") */
.apple-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-link);
}

.apple-link:hover {
  text-decoration: underline;
}

.apple-link svg {
  width: 0.8em;
  height: 0.8em;
}

/* --------------------------------------------------------------------------
   Accessibility & Utility Helpers
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 5000;
  padding: 10px 16px;
  border-radius: 12px;
  background: #1D1D1F;
  color: #FFFFFF;
  font-size: 0.9rem;
  font-weight: 600;
}

.skip-link:focus {
  top: 12px;
}

main:focus {
  outline: none;
}

.visually-hidden,
.hp-field {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.flash-container {
  padding-top: calc(var(--header-height) + 16px);
  margin-bottom: -24px;
  position: relative;
  z-index: 5;
}

.flash-message {
  padding: 14px 20px;
  border-radius: 14px;
  font-weight: 500;
  font-size: 0.94rem;
}

.flash-success {
  background: #EAF7EE;
  color: #14532D;
}

.flash-error {
  background: #FDECEC;
  color: #7F1D1D;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }
}