/* ===================================================
   InnerStack Corporate Website — Global Stylesheet
   Modern · Minimal · Responsive · Bilingual
   =================================================== */

/* ── Variables ────────────────────────────────────── */
:root {
  /* Colors */
  --color-primary: #0a1628;      /* Deep Navy */
  --color-accent: #1a6cf1;       /* Electric Blue */
  --color-accent-light: #3b82f6;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0a1628;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-white: #ffffff;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-accent: 0 8px 30px rgba(26,108,241,0.25);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Container */
  --container: 1200px;
  --container-narrow: 800px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  overflow-wrap: break-word;
}

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

/* Prevent flex children with long text from forcing horizontal overflow */
.contact-info__item > div {
  min-width: 0;
}

.contact-info__item,
.contact-info__value,
.contact-card {
  min-width: 0;
}

.contact-info__value {
  overflow-wrap: break-word;
  word-break: break-word;
}

.header__inner {
  gap: 0.5rem;
}

.header__logo,
.header__actions {
  flex-shrink: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
}

/* ── Scrollbar ────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ── Selection ────────────────────────────────────── */
::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ── Container ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* ── Typography ──────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.125rem; }

p {
  line-height: 1.75;
}

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

/* ── Section Spacing ──────────────────────────────── */
.section {
  padding: var(--space-2xl) 0;
}

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

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-sm);
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  line-height: 1.75;
}

.section--dark .section-desc {
  color: rgba(255,255,255,0.65);
}

/* ── Buttons ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(26,108,241,0.3);
}

.btn--primary:hover {
  background: var(--color-accent-light);
  box-shadow: var(--shadow-accent);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn--outline-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.35);
}

.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

.btn--lg {
  padding: 0.9375rem 2.25rem;
  font-size: 1rem;
}

.btn--sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.875rem;
}

/* ── Header / Navigation ─────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.header__logo-mark {
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: -0.05em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.header__nav a {
  padding: 0.5rem 0.875rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.header__nav a:hover,
.header__nav a.active {
  color: var(--color-accent);
  background: rgba(26,108,241,0.06);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Lang Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 40px;
  padding: 0.25rem;
}

.lang-switcher__btn {
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 40px;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
}

.lang-switcher__btn.active {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.lang-switcher__btn:hover:not(.active) {
  color: var(--color-primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  cursor: pointer;
  background: none;
  border: none;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero Section ────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: var(--color-bg-dark);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(26,108,241,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(26,108,241,0.1) 0%, transparent 50%),
    linear-gradient(180deg, #0a1628 0%, #0f1f3a 100%);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: var(--space-2xl) 0;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(26,108,241,0.15);
  border: 1px solid rgba(26,108,241,0.3);
  color: var(--color-accent-light);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.375rem 1rem;
  border-radius: 40px;
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero__title {
  color: #fff;
  margin-bottom: var(--space-md);
  line-height: 1.1;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent-light);
}

.hero__desc {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-lg);
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.hero__stats {
  display: flex;
  gap: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero__stat {
  text-align: left;
}

.hero__stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.hero__stat-label {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.45);
  font-weight: 500;
}

.hero__visual {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 55%;
  z-index: 1;
  opacity: 0.7;
}

/* ── Features Grid ────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  border-color: rgba(26,108,241,0.2);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  background: rgba(26,108,241,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  font-size: 1.5rem;
  color: var(--color-accent);
  transition: all var(--transition-base);
}

.feature-card:hover .feature-card__icon {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}

.feature-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Products Grid ────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(26,108,241,0.2);
}

.product-card__img {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, #e8f0fe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-accent);
  overflow: hidden;
  position: relative;
}

.product-card__img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(26,108,241,0.05) 100%);
}

.product-card__body {
  padding: var(--space-md);
}

.product-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(26,108,241,0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 40px;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.product-card__title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.product-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-sm);
}

/* ── Cases Grid ──────────────────────────────────── */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.case-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.case-card__img {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, #0a1628 0%, #1a3a6e 50%, #0a1628 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: rgba(255,255,255,0.3);
  position: relative;
  overflow: hidden;
}

.case-card__img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(26,108,241,0.1);
}

.case-card__body {
  padding: var(--space-md);
}

.case-card__industry {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  padding: 0.2rem 0.6rem;
  border-radius: 40px;
  margin-bottom: 0.75rem;
}

.case-card__title {
  font-size: 1.0625rem;
  margin-bottom: 0.5rem;
}

.case-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── News Grid ───────────────────────────────────── */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.news-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.news-card__img {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--color-bg-alt), #e0e8f8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--color-accent);
  opacity: 0.7;
}

.news-card__body {
  padding: var(--space-md);
}

.news-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.news-card__title {
  font-size: 1.0625rem;
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.news-card:hover .news-card__title {
  color: var(--color-accent);
}

.news-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── CTA Section ──────────────────────────────────── */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f2744 50%, var(--color-primary) 100%);
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 50% 50%, rgba(26,108,241,0.2) 0%, transparent 70%);
}

.cta-section__inner {
  position: relative;
  z-index: 2;
}

.cta-section__title {
  color: #fff;
  margin-bottom: var(--space-sm);
}

.cta-section__desc {
  color: rgba(255,255,255,0.6);
  font-size: 1.0625rem;
  margin-bottom: var(--space-lg);
}

/* ── Footer ──────────────────────────────────────── */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.65);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__brand p {
  font-size: 0.875rem;
  margin-top: var(--space-sm);
  line-height: 1.7;
  max-width: 280px;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: #fff;
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.03em;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__links a {
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.8125rem;
}

.footer__social {
  display: flex;
  gap: 0.75rem;
}

.footer__social a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.footer__social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ── Page Hero (Inner pages) ─────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f2744 100%);
  padding: calc(72px + var(--space-2xl)) 0 var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 70% at 70% 50%, rgba(26,108,241,0.15) 0%, transparent 60%),
    linear-gradient(180deg, transparent 0%, rgba(26,108,241,0.05) 100%);
}

.page-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-hero__inner {
  position: relative;
  z-index: 2;
}

.page-hero__title {
  color: #fff;
  margin-bottom: var(--space-xs);
}

.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
}

.page-hero__breadcrumb a {
  transition: color var(--transition-fast);
}

.page-hero__breadcrumb a:hover {
  color: var(--color-accent-light);
}

/* ── Contact Form ────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-layout > * {
  min-width: 0;
}

@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

.contact-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: var(--space-md);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26,108,241,0.12);
}

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

/* ── Form status / consent / spam trap ─────────── */
.form-status {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  font-weight: 500;
  min-height: 1.25rem;
}
.form-status--ok { color: #16a34a; }
.form-status--err { color: #dc2626; }

.form-consent { margin-top: 0.25rem; }
.consent-label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.consent-label input[type="checkbox"] {
  margin-top: 0.2rem;
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
}
.consent-label a { color: var(--color-accent); }

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.contact-info {
  padding: var(--space-lg);
}

.contact-info__item {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  background: rgba(26,108,241,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.125rem;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

.contact-info__value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ── About / Team ─────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about-visual {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f3a6e 50%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-visual::after {
  content: 'INNERSTACK';
  position: absolute;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  color: rgba(255,255,255,0.08);
  letter-spacing: 0.1em;
  user-select: none;
}

.values-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.value-item {
  padding: var(--space-md);
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.value-item__title {
  font-weight: 700;
  margin-bottom: 0.375rem;
  color: var(--color-primary);
}

.value-item__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── Responsive: Tablet & Mobile ──────────────────── */

/* Large Tablet / Small Laptop (≤1100px) */
@media (max-width: 1100px) {
  .container {
    max-width: 100%;
    padding: 0 var(--space-md);
  }

  .header__nav {
    gap: 0;
  }

  .header__nav a {
    padding: 0.5rem 0.6rem;
    font-size: 0.875rem;
  }
}

/* Tablet Portrait (≤992px) → hamburger menu + single-column layouts */
@media (max-width: 992px) {
  .header__nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
    gap: 0;
  }

  .header__nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .header__nav a {
    padding: 0.875rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .menu-toggle {
    display: flex;
  }

  .header__actions {
    gap: 0.75rem;
  }

  .hero__visual {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

/* Tablet & Below (≤768px) */
@media (max-width: 768px) {
  :root {
    --space-2xl: 3.5rem;
    --space-xl: 2.5rem;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

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

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

  .features-grid,
  .products-grid,
  .cases-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .contact-layout {
    grid-template-columns: 1fr !important;
    gap: var(--space-lg) !important;
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .hero__stats {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .hero__stat {
    flex: 1 1 calc(50% - var(--space-md));
    min-width: 120px;
  }

  .hero__stat-num {
    font-size: 1.5rem;
  }
}

/* Large Phone (≤640px) */
@media (max-width: 640px) {
  .header__logo {
    font-size: 1.0625rem;
  }

  .header__logo-mark {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }

  .hero__content {
    padding: var(--space-xl) 0;
  }

  .hero__desc {
    font-size: 1rem;
  }

  .section-desc {
    font-size: 0.9375rem;
  }

  .cta-section__inner > div {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-section__inner .btn {
    width: 100%;
  }
}

/* Phone (≤480px) */
@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .page-hero {
    padding: calc(72px + var(--space-xl)) 0 var(--space-xl);
  }

  .product-card__body,
  .case-card__body,
  .news-card__body,
  .contact-form,
  .feature-card {
    padding: var(--space-md);
  }
}

/* Small Phone (≤380px) */
@media (max-width: 380px) {
  .header__logo {
    font-size: 0.9375rem;
  }

  .lang-switcher__btn {
    padding: 0.3rem 0.5rem;
    font-size: 0.75rem;
  }

  h1,
  .hero__title {
    font-size: 1.875rem;
  }

  .hero__stat {
    min-width: 100px;
  }
}

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

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

.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger.visible > *:nth-child(6) { transition-delay: 0.6s; }

.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ── Utility ──────────────────────────────────────── */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }