/* ============================================
   Scale for Grams — Global Styles
   Design: Günaydın App Studio Design Language
   Palette: Cream (#FFFEF5), Turquoise (#00D4C7), Charcoal (#1A1A1A)
   Font: Urbanist (ultra-light headings, regular body)
   ============================================ */

/* --- CSS Variables --- */
:root {
  --cream: #FFFEF5;
  --cream-dark: #F5F4EB;
  --turquoise: #00FFEF;
  --turquoise-muted: #00D4C7;
  --turquoise-deep: #00B3A6;
  --charcoal: #1A1A1A;
  --gray-900: #2D2D2D;
  --gray-700: #555555;
  --gray-500: #888888;
  --gray-300: #CCCCCC;
  --gray-100: #F0F0F0;
  --white: #FFFFFF;
  --font-primary: 'Urbanist', sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 40px rgba(0,212,199,0.15);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--cream);
  color: var(--charcoal);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--turquoise-muted);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 200;
  line-height: 1.2;
  color: var(--charcoal);
}

h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); letter-spacing: -0.01em; }
h4 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
p { font-size: 1rem; color: var(--gray-700); }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 60px 0;
}

@media (min-width: 768px) {
  .container { padding: 0 40px; }
  section { padding: 100px 0; }
}

@media (min-width: 1024px) {
  .container { padding: 0 60px; }
  section { padding: 120px 0; }
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(255, 254, 245, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  padding: 12px 0;
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--charcoal);
}

.navbar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.navbar-links {
  display: none;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.navbar-links a {
  color: var(--gray-700);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.navbar-links a:hover {
  color: var(--charcoal);
}

@media (min-width: 768px) {
  .navbar-links { display: flex; }
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--charcoal);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}

.btn-nav-cta:hover {
  background: var(--gray-900);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* --- Hero Section --- */
.hero {
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    min-height: 100vh;
    padding-top: 100px;
    padding-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding-top: 120px;
  }
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 255, 239, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 212, 199, 0.1);
  border: 1px solid rgba(0, 212, 199, 0.2);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--turquoise-deep);
  letter-spacing: 0.02em;
}

.hero-title {
  max-width: 700px;
}

.hero-title span {
  color: var(--turquoise-muted);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--gray-700);
  max-width: 540px;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--charcoal);
  color: var(--white);
  padding: 16px 32px;
  border-radius: 16px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
}

.btn-appstore:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.btn-appstore svg {
  width: 24px;
  height: 24px;
}

.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--gray-500);
}

.hero-stars {
  display: flex;
  gap: 2px;
  color: #FFB800;
}

.hero-phone-mockup {
  width: 260px;
  max-width: 70vw;
  filter: drop-shadow(0 20px 60px rgba(0,0,0,0.12));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

@media (min-width: 768px) {
  .hero .container {
    flex-direction: row;
    text-align: left;
    gap: 60px;
  }
  .hero-content {
    flex: 1;
    align-items: flex-start;
    gap: 28px;
  }
  .hero-visual { flex: 0 0 auto; }
  .hero-phone-mockup { width: 300px; }
  .hero-cta-group { flex-direction: row; }
}

@media (min-width: 1024px) {
  .hero .container { gap: 80px; }
  .hero-content { gap: 32px; }
  .hero-phone-mockup { width: 340px; }
}

@media (min-width: 1280px) {
  .hero-phone-mockup { width: 380px; }
}

/* --- Features Section --- */
.features {
  background: var(--white);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 40px;
}

@media (min-width: 768px) {
  .section-header { margin: 0 auto 60px; }
}

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--turquoise-muted);
  margin-bottom: 16px;
}

.section-header p {
  margin-top: 16px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  background: var(--cream);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition);
  border: 1px solid transparent;
}

@media (min-width: 768px) {
  .feature-card { padding: 36px 28px; }
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 212, 199, 0.15);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(0, 212, 199, 0.1);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-weight: 500;
}

.feature-card p {
  font-size: 0.92rem;
  line-height: 1.7;
}

/* --- Screenshots Section --- */
.screenshots {
  overflow: hidden;
}

.screenshots-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 20px 0;
  scrollbar-width: none;
}

.screenshots-scroll::-webkit-scrollbar { display: none; }

.screenshot-item {
  flex: 0 0 auto;
  width: 220px;
  scroll-snap-align: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition);
}

.screenshot-item:hover {
  transform: scale(1.03);
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}

@media (min-width: 768px) {
  .screenshot-item { width: 260px; }
}

@media (min-width: 1024px) {
  .screenshot-item { width: 300px; }
}

/* --- Video Section --- */
.video-section {
  background: var(--white);
}

.video-wrapper {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--gray-100);
}

@media (min-width: 1024px) {
  .video-wrapper { max-width: 900px; }
}

.video-wrapper iframe,
.video-wrapper video {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border: none;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: linear-gradient(135deg, var(--charcoal) 0%, var(--gray-900) 100%);
  color: var(--white);
  cursor: pointer;
  position: absolute;
  top: 0;
  left: 0;
}

.video-play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  border: 2px solid rgba(255,255,255,0.2);
}

.video-play-btn:hover {
  background: var(--turquoise-muted);
  border-color: var(--turquoise-muted);
  transform: scale(1.08);
}

/* --- Reviews Section --- */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .reviews-grid { grid-template-columns: repeat(3, 1fr); }
}

.review-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.review-card:hover {
  box-shadow: var(--shadow-md);
}

.review-stars {
  display: flex;
  gap: 2px;
  color: #FFB800;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: 16px;
}

.review-author {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-500);
}

/* --- FAQ Section --- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--gray-100);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-family: var(--font-primary);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--charcoal);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--turquoise-deep); }

.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding-bottom: 24px;
  font-size: 0.95rem;
  color: var(--gray-700);
  line-height: 1.8;
}

/* --- SEO Expandable Text --- */
.seo-text-section {
  padding: 40px 0;
}

.seo-text-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.seo-text-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.6s ease;
}

.seo-text-content.expanded {
  max-height: 8000px;
}

.seo-text-content article {
  padding-top: 24px;
}

.seo-text-content h2 {
  font-size: 1.4rem;
  font-weight: 400;
  margin: 32px 0 12px;
}

.seo-text-content h3 {
  font-size: 1.15rem;
  font-weight: 500;
  margin: 24px 0 10px;
}

.seo-text-content p {
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.85;
}

.seo-text-content ul {
  margin-bottom: 16px;
  padding-left: 20px;
}

.seo-text-content li {
  font-size: 0.95rem;
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 6px;
}

.seo-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--turquoise-deep);
  cursor: pointer;
  padding: 12px 0;
  transition: color var(--transition);
}

.seo-toggle-btn:hover { color: var(--turquoise-muted); }

.seo-toggle-btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition);
}

.seo-toggle-btn.expanded svg {
  transform: rotate(180deg);
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--charcoal);
  color: var(--white);
  text-align: center;
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .cta-banner { padding: 100px 0; }
}

@media (min-width: 1024px) {
  .cta-banner { padding: 120px 0; }
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 255, 239, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: 16px;
}

.cta-banner p {
  color: rgba(255,255,255,0.65);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.btn-appstore-light {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  color: var(--charcoal);
  padding: 16px 32px;
  border-radius: 16px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
}

.btn-appstore-light:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: var(--charcoal);
}

/* --- Footer --- */
.footer {
  background: var(--cream-dark);
  padding: 48px 0 24px;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--gray-500);
  margin-top: 8px;
  max-width: 280px;
}

.footer-links {
  display: flex;
  gap: 40px;
}

.footer-links-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 16px;
}

.footer-links-col ul {
  list-style: none;
}

.footer-links-col li {
  margin-bottom: 10px;
}

.footer-links-col a {
  font-size: 0.9rem;
  color: var(--gray-700);
}

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

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.footer-legal {
  font-size: 0.75rem;
  color: var(--gray-500);
  line-height: 1.6;
  max-width: 600px;
}

/* --- Blog Listing --- */
.blog-hero {
  padding: 140px 0 60px;
  text-align: center;
}

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-bottom: 80px;
}

@media (min-width: 640px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .blog-grid { grid-template-columns: repeat(3, 1fr); }
}

.blog-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-card-image {
  aspect-ratio: 16/10;
  background: var(--gray-100);
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card-body {
  padding: 24px;
}

.blog-card-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--turquoise-deep);
  margin-bottom: 10px;
}

.blog-card-body h3 {
  font-weight: 500;
  margin-bottom: 8px;
}

.blog-card-body h3 a {
  color: var(--charcoal);
}

.blog-card-body h3 a:hover {
  color: var(--turquoise-deep);
}

.blog-card-meta {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* --- Blog Post --- */
.blog-post-header {
  padding: 140px 0 40px;
  text-align: center;
}

.blog-post-header h1 {
  max-width: 720px;
  margin: 0 auto 16px;
}

.blog-post-meta {
  font-size: 0.88rem;
  color: var(--gray-500);
}

.blog-post-body {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 80px;
}

.blog-post-body h2 {
  font-weight: 400;
  margin: 48px 0 16px;
}

.blog-post-body h3 {
  font-weight: 500;
  margin: 32px 0 12px;
}

.blog-post-body p {
  margin-bottom: 20px;
  font-size: 1.02rem;
  line-height: 1.85;
}

.blog-post-body img {
  border-radius: var(--radius-md);
  margin: 32px 0;
  box-shadow: var(--shadow-md);
}

.blog-post-body ul, .blog-post-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.blog-post-body li {
  font-size: 1.02rem;
  color: var(--gray-700);
  line-height: 1.85;
  margin-bottom: 8px;
}

/* --- Utilities --- */
.text-center { text-align: center; }

.section-title-visual {
  font-family: var(--font-primary);
  font-weight: 200;
  line-height: 1.2;
  color: var(--charcoal);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Print --- */
@media print {
  .navbar, .cta-banner, .seo-text-section { display: none; }
}