/* --- NOBS Premium Dark Design System & Layout --- */
:root {
  --bg-dark: #0D1314;       /* Deepest space teal-black */
  --bg-card: rgba(50, 75, 76, 0.15); /* Semi-transparent Slate-Teal */
  --bg-card-hover: rgba(50, 75, 76, 0.3);
  --border-color: rgba(255, 255, 255, 0.05);
  --border-hover: #E4FF24;  /* Electric Lime */
  --accent-lime: #E4FF24;
  --accent-lime-dim: rgba(228, 255, 36, 0.15);
  --text-primary: #FFFFFF;
  --text-secondary: #A7B8B9;
  --text-dark: #0D1314;
  --font-family: 'Geist', sans-serif;
  --nav-height: 80px;
  --max-width: 1200px;
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Language Toggle Display Logic --- */
body.lang-en .lang-tr {
  display: none !important;
}
body.lang-tr .lang-en {
  display: none !important;
}

/* --- Reset & Base Styles --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  font-family: var(--font-family);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Custom Selection */
::selection {
  background: var(--accent-lime-dim);
  color: var(--accent-lime);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-card);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-lime);
}

/* --- Container Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  width: 100%;
}

/* --- BACKGROUND GLOW GRAPHICS --- */
.ambient-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 1;
  opacity: 0.15;
  mix-blend-mode: screen;
}
.glow-lime {
  background: radial-gradient(circle, var(--accent-lime) 0%, rgba(228,255,36,0) 70%);
  top: -200px;
  right: -100px;
}
.glow-teal {
  background: radial-gradient(circle, #324B4C 0%, rgba(50,75,76,0) 70%);
  bottom: 10%;
  left: -200px;
}

/* --- PERSISTENT HEADER --- */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(13, 19, 20, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.header-nav.scrolled {
  height: 70px;
  background: rgba(13, 19, 20, 0.95);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.logo-svg {
  width: 86px;
  height: 24px;
  display: block;
}

.logo-svg .logo-text-path {
  fill: var(--text-primary);
}

.logo-svg .logo-dot-path {
  fill: var(--accent-lime);
}

.logo span {
  color: var(--accent-lime);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  text-transform: lowercase;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:not(.btn-cta)::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-lime);
  transition: var(--transition);
}

.nav-links a:not(.btn-cta):hover::after,
.nav-links a:not(.btn-cta).active::after {
  width: 100%;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.lang-btn {
  cursor: pointer;
  transition: var(--transition);
  opacity: 0.5;
  text-transform: lowercase;
}

.lang-btn:hover {
  opacity: 0.8;
  color: var(--text-primary);
}

body.lang-en .lang-btn-en,
body.lang-tr .lang-btn-tr {
  color: var(--accent-lime);
  opacity: 1;
}

.divider {
  color: var(--border-color);
  font-weight: 300;
}

/* Header Button */
.btn-cta {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(228, 255, 36, 0.4);
  background: transparent;
  color: var(--accent-lime);
  font-weight: 600;
  font-size: 0.75rem;
  text-decoration: none;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  transition: var(--transition);
  cursor: pointer;
}

.btn-cta:hover {
  background: var(--accent-lime);
  color: var(--text-dark);
  border-color: var(--accent-lime);
  box-shadow: 0 4px 15px rgba(228, 255, 36, 0.15);
}

/* Burger Menu (Mobile only) */
.burger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  z-index: 1001;
}

.burger div {
  width: 25px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
}

/* --- HERO SECTION --- */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 40px);
  display: flex;
  align-items: center;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-content {
  z-index: 10;
}

.hero h1 {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 span {
  color: var(--accent-lime);
}

.hero p {
  font-size: 1.15rem;
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 600px;
}

.hero-btn {
  padding: 16px 36px;
  border-radius: 30px;
  font-size: 1rem;
  border-color: var(--accent-lime);
  box-shadow: 0 8px 25px rgba(228, 255, 36, 0.15);
}

/* Watermark Graphic */
.hero-graphic {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  opacity: 0.15;
  pointer-events: none;
  z-index: 1;
}

.hero-graphic svg {
  width: 100%;
  max-width: 450px;
  height: auto;
}

@media (min-width: 993px) {
  .hero-graphic {
    height: calc(100vh - var(--nav-height) - 120px);
    align-items: center;
  }
  .hero-graphic svg {
    max-height: 100%;
    width: auto;
  }
}

/* --- SECTION GENERAL STYLES --- */
.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  margin-bottom: 60px;
}

.section-subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-lime);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* --- PHILOSOPHY SECTION --- */
.philo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.philo-body {
  font-size: 1.1rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.philo-body p strong {
  color: var(--text-primary);
  font-weight: 500;
}

.quote-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.quote-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(10px);
}

.quote-text {
  font-size: 0.95rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.quote-author {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-lime);
}

/* --- CONSTANTS SECTION (GRID) --- */
.constants-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 48px;
}

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

.constant-card {
  perspective: 1000px;
  height: 230px;
  cursor: pointer;
  position: relative;
  background: transparent;
  border: none;
  padding: 0;
  overflow: visible;
  transition: transform 0.3s ease;
}

.constant-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.85s cubic-bezier(0.25, 1, 0.5, 1);
  transform-style: preserve-3d;
}

.constant-card:hover .constant-card-inner {
  transform: rotateY(180deg);
}

.constant-card-front,
.constant-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 16px;
  padding: 28px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

/* Front Face */
.constant-card-front {
  justify-content: center;
  z-index: 2;
}

.constant-card-front::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 0% 0%, rgba(228, 255, 36, 0.03) 0%, rgba(228, 255, 36, 0) 60%);
  border-radius: 16px;
  pointer-events: none;
}

/* Back Face */
.constant-card-back {
  transform: rotateY(180deg);
  justify-content: center;
  border-color: var(--accent-lime);
  box-shadow: 0 0 20px rgba(228, 255, 36, 0.08);
}

.constant-card:hover .constant-card-front,
.constant-card:hover .constant-card-back {
  border-color: var(--accent-lime);
}

.constant-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.constant-diamond {
  color: var(--accent-lime);
  font-size: 1rem;
}

.constant-name {
  font-size: 1.4rem;
  font-weight: 800;
  text-transform: lowercase;
  color: var(--text-primary);
}

.constant-short {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.constant-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- METHODOLOGY PAGE STYLES --- */
.methodology-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.method-card:hover {
  border-color: var(--accent-lime);
  transform: translateY(-3px);
}

.method-icon {
  margin-bottom: 8px;
  width: 36px;
  height: 36px;
  color: var(--accent-lime);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.method-icon svg {
  width: 100%;
  height: 100%;
}

.method-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.method-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- WORKS PAGE STYLES --- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  position: relative;
  backdrop-filter: blur(10px);
}

.work-dashboard {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 20px;
}

.dash-item {
  border-left: 2px solid var(--accent-lime);
  padding-left: 20px;
}

.dash-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-lime);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.dash-value {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.works-soon {
  text-align: center;
  padding: 80px 0;
  border: 1px dashed var(--border-color);
  border-radius: 20px;
}

.soon-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.soon-desc {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* --- CONTACT FORM STYLES --- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.info-item-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-lime);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.info-item-val {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group {
  margin-bottom: 24px;
  position: relative;
}

.form-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 20px;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-lime);
  background: var(--bg-card-hover);
}

textarea.form-input {
  min-height: 150px;
  resize: vertical;
}

.form-submit-btn {
  width: 100%;
  padding: 16px;
  border-radius: 12px;
  border: none;
  background: var(--accent-lime);
  color: var(--text-dark);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.form-submit-btn:hover {
  background: #FFFFFF;
  box-shadow: 0 8px 25px rgba(255,255,255,0.1);
}

/* --- FOOTER --- */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  background: rgba(13, 19, 20, 0.5);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-dot {
  color: var(--accent-lime);
}

/* --- SCROLL REVEAL ANIMATIONS --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 992px) {
  .hero-grid, .philo-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .hero h1 {
    font-size: 2.8rem;
  }
  .constants-grid, .methodology-grid, .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-graphic {
    order: -1;
    max-width: 300px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .constants-grid, .methodology-grid, .works-grid {
    grid-template-columns: 1fr;
  }
  .burger {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 100%;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: var(--bg-dark);
    flex-direction: column;
    padding-top: 60px;
    gap: 40px;
    transition: var(--transition);
    border-top: 1px solid var(--border-color);
  }
  .nav-links.active {
    left: 0;
  }
  .container {
    padding: 0 24px;
  }
}

/* --- CONTACT PAGE ENHANCEMENTS --- */
.contact-pledges {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}

.pledge-card {
  display: flex;
  gap: 16px;
  align-items: start;
}

.pledge-icon {
  color: var(--accent-lime);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.pledge-content h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: lowercase;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pledge-content p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}