/* ===== Variables – Colour palette & theme ===== */
:root {
  --dark: #1C2128;
  --medium: #3D4F66;
  --accent: #3D5A80;
  --accent-soft: #8A734A;
  --light: #ffffff;
  --white: #ffffff;
  --font: 'Manrope', system-ui, sans-serif;
  --font-display: 'Fraunces', Georgia, serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow: 0 2px 16px rgba(28, 33, 40, 0.06);
  --shadow-hover: 0 8px 24px rgba(28, 33, 40, 0.1);
  --transition: 0.2s ease;

  --bg-page: #ffffff;
  --text-primary: #1C2128;
  --text-secondary: #5C6570;
  --bg-card: #ffffff;
  --bg-section-alt: #ffffff;
  --border-card: rgba(28, 33, 40, 0.1);
  --tag-bg: rgba(61, 90, 128, 0.1);
  --tag-bg-muted: rgba(61, 90, 128, 0.08);
  --about-code-bg: #F5F5F5;
  --timeline-marker-border: #ffffff;
  --modal-bg: #ffffff;
  --modal-footer-bg: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.92);
  --header-text: #1C2128;
  --header-border: rgba(28, 33, 40, 0.08);
  --footer-bg: #ffffff;
  --footer-text: #1C2128;
  --about-code-text: #1C2128;
  --code-key: #5C4B8A;
  --code-class: #8A5A28;
  --code-fn: #3D5A80;
  --code-var: #8A3D3D;
  --code-str: #3D6B4F;
  --contact-bg: #ffffff;
  --contact-text: #1C2128;
  --contact-card-bg: #ffffff;
  --contact-card-inner: #ffffff;
  --contact-card-border: rgba(28, 33, 40, 0.1);
  --contact-btn-outline: rgba(28, 33, 40, 0.28);
  --contact-btn-outline-hover: #3D5A80;
  --contact-note-code-bg: rgba(28, 33, 40, 0.06);
  --hero-bg: #ffffff;
  --hero-text: #1C2128;
  --hero-label: #5C6570;
  --hero-scroll: rgba(28, 33, 40, 0.45);
  --hero-scroll-border: rgba(28, 33, 40, 0.22);
  --hero-btn-outline: rgba(28, 33, 40, 0.28);
  --btn-primary-bg: #1C2128;
  --btn-primary-text: #ffffff;
  --btn-primary-hover: #2A313C;
}

[data-theme="light"] {
  --bg-page: #ffffff;
  --bg-section-alt: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.92);
  --footer-bg: #ffffff;
  --about-code-bg: #F5F5F5;
  --timeline-marker-border: #ffffff;
  --modal-footer-bg: #ffffff;
  --contact-bg: #ffffff;
  --contact-text: #1C2128;
  --contact-card-bg: #ffffff;
  --contact-card-inner: #ffffff;
  --contact-card-border: rgba(28, 33, 40, 0.1);
  --contact-btn-outline: rgba(28, 33, 40, 0.28);
  --contact-btn-outline-hover: #3D5A80;
  --hero-bg: #ffffff;
  --hero-text: #1C2128;
  --hero-label: #5C6570;
  --hero-scroll: rgba(28, 33, 40, 0.45);
  --hero-scroll-border: rgba(28, 33, 40, 0.22);
  --hero-btn-outline: rgba(28, 33, 40, 0.28);
}

[data-theme="dark"] {
  --bg-page: #14181E;
  --text-primary: #EEF0F3;
  --text-secondary: #9AA4B2;
  --bg-card: #1C222B;
  --bg-section-alt: #191E26;
  --border-card: rgba(238, 240, 243, 0.1);
  --tag-bg: rgba(139, 163, 199, 0.14);
  --tag-bg-muted: rgba(139, 163, 199, 0.1);
  --about-code-bg: #191E26;
  --about-code-text: #EEF0F3;
  --code-key: #B8A6D9;
  --code-class: #D4B483;
  --code-fn: #8BA3C7;
  --code-var: #D4A0A0;
  --code-str: #8FBF9F;
  --timeline-marker-border: #1C222B;
  --modal-bg: #1C222B;
  --modal-footer-bg: #191E26;
  --shadow: 0 2px 18px rgba(0, 0, 0, 0.28);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.36);
  --header-bg: rgba(20, 24, 30, 0.9);
  --header-text: #EEF0F3;
  --header-border: rgba(238, 240, 243, 0.08);
  --footer-bg: #191E26;
  --footer-text: #EEF0F3;
  --contact-bg: #14181E;
  --contact-text: #EEF0F3;
  --contact-card-bg: #1C222B;
  --contact-card-inner: #1C222B;
  --contact-card-border: rgba(238, 240, 243, 0.1);
  --contact-btn-outline: rgba(238, 240, 243, 0.28);
  --contact-btn-outline-hover: #C4B49A;
  --contact-note-code-bg: rgba(255, 255, 255, 0.08);
  --hero-bg: #14181E;
  --hero-text: #EEF0F3;
  --hero-label: #9AA4B2;
  --hero-scroll: rgba(238, 240, 243, 0.55);
  --hero-scroll-border: rgba(238, 240, 243, 0.28);
  --hero-btn-outline: rgba(238, 240, 243, 0.28);
  --accent: #8BA3C7;
  --medium: #8BA3C7;
  --accent-soft: #C4B49A;
  --btn-primary-bg: #EEF0F3;
  --btn-primary-text: #14181E;
  --btn-primary-hover: #ffffff;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-page);
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Erişilebilirlik: klavye ile ilk odakta görünür */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-weight: 600;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--light);
  outline-offset: 2px;
}

/* ===== Header & Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--header-border);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.logo-mark {
  display: block;
  height: auto;
}

.nav-logo .logo-mark {
  height: 28px;
  width: auto;
}

.logo-mark-dark {
  display: none;
}

[data-theme="dark"] .logo-mark-light {
  display: none;
}

[data-theme="dark"] .logo-mark-dark {
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--header-text);
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--accent);
}

.nav-cta {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text) !important;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}

.nav-cta:hover {
  background: var(--btn-primary-hover);
  color: var(--btn-primary-text) !important;
}

.nav-link.is-active {
  color: var(--accent);
}

/* Language switcher (TR / EN) */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.lang-btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--header-text);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.lang-btn:hover {
  color: var(--accent);
}
.lang-btn.is-active {
  color: var(--accent);
  background: var(--tag-bg);
}
.lang-sep {
  color: var(--header-text);
  opacity: 0.5;
  font-weight: 500;
  user-select: none;
}

/* Theme toggle (light/dark) */
.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid var(--header-border);
  border-radius: var(--radius);
  color: var(--header-text);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

[data-theme="dark"] .theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-icon {
  position: absolute;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-icon-moon {
  opacity: 0;
}

.theme-icon-sun {
  opacity: 1;
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
}

.theme-toggle .theme-icon-sun,
.theme-toggle .theme-icon-moon {
  position: absolute;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--header-text);
  border-radius: 2px;
  transition: background var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: auto;
  display: flex;
  align-items: center;
  padding: 8.5rem 0 3.5rem;
  background: var(--hero-bg);
  color: var(--hero-text);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  width: 42rem;
  height: 42rem;
  right: -12rem;
  top: -10rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 90, 128, 0.12) 0%, transparent 68%);
}

[data-theme="dark"] .hero-orb {
  background: radial-gradient(circle, rgba(139, 163, 199, 0.12) 0%, transparent 68%);
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.7fr);
  gap: 4rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-soft);
  margin-bottom: 1.1rem;
  font-weight: 600;
}

.hero-title {
  margin: 0 0 0.85rem;
  line-height: 0;
}

.hero-title .logo-mark {
  width: min(100%, 22rem);
  height: auto;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--hero-label);
  font-weight: 500;
  margin-bottom: 1.15rem;
}

.hero-desc {
  max-width: 34rem;
  font-size: 1.05rem;
  line-height: 1.7;
  opacity: 0.88;
  margin-bottom: 2rem;
  color: var(--hero-text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-panel {
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 1.6rem 1.7rem;
}

.hero-panel-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent-soft);
  margin-bottom: 1.1rem;
}

.hero-panel-list {
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.hero-panel-list li {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-card);
}

.hero-panel-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.hero-panel-list span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-soft);
  min-width: 1.6rem;
}

.hero-panel-list strong {
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: var(--btn-primary-hover);
  color: var(--btn-primary-text);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--hero-btn-outline);
}

.hero .btn-outline {
  color: var(--hero-text);
  border-color: var(--hero-btn-outline);
}

.hero .btn-outline:hover,
.btn-outline:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

@media (max-width: 900px) {
  .hero {
    padding-top: 7rem;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ===== Sections ===== */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--bg-section-alt);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-lead {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.about-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.about-meta a {
  color: inherit;
}

.about-meta a:hover {
  color: var(--accent);
}

.about-visual {
  margin: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-visual img {
  width: 100%;
  height: auto;
  display: block;
}

.about-visual-caption {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 0.9rem 1.15rem 1.1rem;
  border-top: 1px solid var(--border-card);
}

.about-visual-caption span {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-soft);
}

/* ===== Skills (kart + çerçeve animasyonu) ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.skill-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.skill-category {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags li {
  background: var(--tag-bg);
  color: var(--text-primary);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* ===== Experience (Timeline) ===== */
.timeline {
  position: relative;
  max-width: 640px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-soft), var(--accent));
  border-radius: 2px;
}

.timeline-heading {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem 3rem;
  padding-bottom: 0.25rem;
}
.timeline-heading:first-child {
  margin-top: 0;
}

.timeline-item {
  position: relative;
  padding-left: 3rem;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: 0;
  top: 0.25rem;
  width: 26px;
  height: 26px;
  background: var(--medium);
  border: 4px solid var(--timeline-marker-border);
  border-radius: 50%;
  box-shadow: var(--shadow);
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.timeline-content h4 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.timeline-date {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-content p {
  font-size: 0.95rem;
  color: var(--text-primary);
  opacity: 0.9;
}

.timeline-heading {
  color: var(--text-secondary);
}

/* ===== Projects (kart + çerçeve animasyonu) ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.project-card-wide {
  grid-column: 1 / -1;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.project-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.project-year {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}

.project-card p {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.project-tags li {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: var(--tag-bg-muted);
  color: var(--text-secondary);
  border-radius: 4px;
}

.project-link {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent);
  margin-top: auto;
}

.project-link:hover {
  color: var(--text-secondary);
}

/* ===== Achievements (card + frame animation) ===== */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.achievement-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.achievement-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.achievement-icon {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  display: block;
  margin-bottom: 0.75rem;
}

.achievement-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.achievement-card p {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.achievement-card p:last-child {
  margin-bottom: 0;
}

/* ===== Contact / CTA (theme-aware) ===== */
.section-cta {
  background: var(--contact-bg);
  color: var(--contact-text);
  transition: background var(--transition), color var(--transition);
}

.section-cta .section-title {
  color: var(--contact-text);
}

.section-cta .container {
  max-width: 640px;
}

.contact-card {
  position: relative;
  background: var(--contact-card-bg);
  border: 1px solid var(--contact-card-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.contact-lead {
  max-width: 100%;
  margin-bottom: 2rem;
  opacity: 0.95;
  color: var(--contact-text);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-cta .btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.section-cta .btn-outline {
  color: var(--contact-text);
  border-color: var(--contact-btn-outline);
}

.section-cta .btn-outline:hover {
  border-color: var(--contact-text);
  color: var(--contact-text);
}

.contact-note {
  font-size: 0.85rem;
  opacity: 0.8;
  color: var(--contact-text);
}

.contact-note code {
  background: var(--contact-note-code-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  color: var(--contact-text);
}

/* ===== Proje detay modal (açılır pencere) ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(28, 33, 40, 0.55);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: var(--modal-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 48px rgba(20, 24, 30, 0.28), 0 0 0 1px var(--border-card);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.3s ease, background var(--transition);
  overflow: hidden;
}

.modal-overlay.is-open .modal-window {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--dark);
  color: var(--light);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--light);
}

.modal-year {
  font-size: 0.85rem;
  color: var(--accent-soft);
  font-weight: 600;
  flex-shrink: 0;
}

.modal-close {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: var(--radius);
  color: var(--light);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.25);
  color: var(--white);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.modal-desc {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-primary);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  list-style: none;
}

.modal-tags li {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: var(--tag-bg-muted);
  color: var(--text-secondary);
  border-radius: 4px;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-card);
  background: var(--modal-footer-bg);
  transition: background var(--transition), border-color var(--transition);
}

.modal-link {
  display: inline-flex;
}

/* Kart tıklanabilir görünsün */
.project-card[data-project] {
  cursor: pointer;
}

.project-card[data-project] .project-link {
  pointer-events: auto;
}

/* ===== Footer ===== */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 2rem 0;
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition);
}

.footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--footer-text);
  transition: color var(--transition);
}

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 4rem;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - 4rem);
    background: var(--header-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1rem;
    transition: right var(--transition);
    border-left: 1px solid var(--header-border);
  }

  .nav-menu.is-open {
    right: 0;
  }

  .nav-menu {
    border-left: 1px solid var(--header-border);
  }

  .nav-toggle {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-visual {
    order: -1;
  }

  .timeline::before {
    left: 8px;
  }

  .timeline-marker {
    width: 18px;
    height: 18px;
    left: -1px;
  }

  .timeline-item {
    padding-left: 2.5rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .contact-actions {
    flex-direction: column;
  }

  .contact-actions .btn {
    width: 100%;
  }
}

/* ===== SAM: metrics band ===== */
.metrics-band {
  position: relative;
  z-index: 2;
  margin-top: 0;
  padding: 0 0 2rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.metric-card:hover {
  border-color: var(--accent);
}

.metric-card strong {
  display: block;
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.metric-card span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== SAM: checklist ===== */
.checklist {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.checklist li,
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.check-mark {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--tag-bg);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.1rem;
}

/* ===== SAM: contact layout + form ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1.5rem;
  align-items: start;
}

.section-cta .container.container-wide {
  max-width: 1100px;
}

.contact-info-list {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.contact-info-list div {
  font-size: 0.95rem;
  color: var(--contact-text);
}

.contact-info-list b {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.contact-info-list a {
  color: var(--contact-text);
}

.contact-info-list a:hover {
  color: var(--accent);
}

.contact-phones {
  display: grid;
  gap: 0.35rem;
}

.contact-person {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.contact-form {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--contact-text);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--contact-card-border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(61, 90, 128, 0.18);
}

.form-consent {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--contact-text);
}

.form-consent input {
  margin-top: 0.2rem;
}

.form-status {
  min-height: 1.25rem;
  font-size: 0.9rem;
  color: var(--accent);
}

.form-status.is-error {
  color: #c2410c;
}

[data-theme="dark"] .form-status.is-error {
  color: #fb7185;
}

.form-status.is-success {
  color: #15803d;
  font-weight: 600;
}

[data-theme="dark"] .form-status.is-success {
  color: #4ade80;
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

/* ===== SAM: footer grid ===== */
.footer .container.footer-wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.footer-brand p {
  margin-top: 0.75rem;
  max-width: 320px;
  opacity: 0.85;
}

.footer-col h4 {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.footer-col a,
.footer-col p {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--footer-text);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--header-border);
  font-size: 0.85rem;
  opacity: 0.8;
}

@media (max-width: 900px) {
  .metrics-grid,
  .contact-layout,
  .form-row,
  .footer .container.footer-wrap {
    grid-template-columns: 1fr;
  }

  .metrics-band {
    margin-top: 0;
  }
}

/* WhatsApp Icon Link */
.contact-phone-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.whatsapp-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #25D366 !important;
  transition: transform 0.2s ease, opacity 0.2s ease;
  line-height: 1;
  text-decoration: none;
}

.whatsapp-icon-link:hover {
  transform: scale(1.22);
  opacity: 0.88;
}

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

  .modal-overlay,
  .modal-window {
    transition: none;
  }
}