/**
 * SESİN İşitme Cihazları — Base Styles, Typography & Reset
 */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,600&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--text-main);
  background-color: var(--bg-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

/* Typography Hierarchy — Clean Scandinavian / Swiss Medical Precision */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-slate-900);
  font-weight: 700;
  line-height: var(--line-height-snug);
  letter-spacing: -0.025em;
  text-wrap: balance;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.display-title {
  font-size: var(--font-size-display);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: -0.035em;
}

h1, .h1 {
  font-size: var(--font-size-h1);
  letter-spacing: -0.03em;
}

h2, .h2 {
  font-size: var(--font-size-h2);
  letter-spacing: -0.025em;
}

h3, .h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  letter-spacing: -0.015em;
}

h4, .h4 {
  font-size: var(--font-size-h4);
  font-weight: 600;
}

p {
  color: var(--text-muted);
  line-height: 1.68;
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

p.lead {
  font-size: var(--font-size-body-lg);
  line-height: 1.7;
  color: var(--color-slate-700);
}

small, .text-small {
  font-size: var(--font-size-body-sm);
  line-height: 1.5;
}

.caption {
  font-size: var(--font-size-caption);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-600);
}

a {
  color: var(--color-accent-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-800);
}

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Accessibility & Focus Outlines */
:focus-visible {
  outline: 2px solid var(--color-accent-500);
  outline-offset: 3px;
}

.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-slate-900);
  color: var(--color-white);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 1rem;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: clamp(3.5rem, 6vw, 6rem);
  position: relative;
}

.section-sm {
  padding-block: clamp(2rem, 4vw, 3.5rem);
}

.section-dark {
  background-color: var(--color-primary-950);
  color: var(--color-white);
}

.section-dark h1, 
.section-dark h2, 
.section-dark h3, 
.section-dark h4 {
  color: var(--color-white);
}

.section-dark p {
  color: var(--color-slate-300);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 4vw, 4rem);
}

.section-header.text-left {
  text-align: left;
  margin-inline: 0;
}

.section-title {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: var(--font-size-body-lg);
  color: var(--text-muted);
  line-height: 1.6;
}

/* Reduced Motion Preference */
@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;
  }
}