/*
  AlkeraERP — Product-focused, professional dark theme
  Hero + interactive module showcase using real screenshots
*/

:root {
  --bg-base:     #0A1020;
  --bg-soft:     #0E1730;
  --bg-card:     #121C36;
  --bg-elevated: #182447;

  --text-primary:   #F1F5FB;
  --text-secondary: #9AA8C2;
  --text-muted:     #5A6884;

  --accent:        #38BDF8;
  --accent-strong: #0EA5E9;
  --accent-soft:   rgba(56, 189, 248, 0.12);
  --accent-glow:   rgba(56, 189, 248, 0.35);
  --gradient-accent: linear-gradient(135deg, #38BDF8 0%, #6366F1 100%);

  --border:        rgba(148, 163, 184, 0.10);
  --border-strong: rgba(148, 163, 184, 0.20);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 10px 30px rgba(0,0,0,0.35);
  --shadow-xl: 0 30px 80px rgba(0,0,0,0.55);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --font-heading: 'Outfit', sans-serif;
  --font-body:    'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.025) 1px, transparent 1px),
    radial-gradient(900px 600px at 80% -10%, rgba(56,189,248,0.10), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(99,102,241,0.10), transparent 60%);
  background-size: 48px 48px, 48px 48px, 100% 100%, 100% 100%;
  background-attachment: fixed;
}

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

a { text-decoration: none; color: inherit; transition: all 0.25s ease; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Utility ───────────────────────────────────────── */
.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(56,189,248,0.25);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
}

.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
}

.text-logo {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  display: inline-flex;
  align-items: baseline;
}
.text-logo .accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
  margin-left: 1px;
}

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--gradient-accent);
  color: #06121f;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(56,189,248,0.25);
}
.btn-primary:hover { box-shadow: 0 14px 40px rgba(56,189,248,0.40); }

.btn-secondary {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: var(--accent); color: var(--accent); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  font-size: 0.85rem;
  padding: 0.55rem 1.1rem;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ── Navbar ────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; width: 100%;
  padding: 1.25rem 0;
  z-index: 100;
  background: rgba(10,16,32,0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: padding 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}
.navbar.scrolled {
  padding: 0.75rem 0;
  background: rgba(10,16,32,0.85);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}
.logo img {
  height: 44px;
  width: auto;
  object-fit: contain;
  border-radius: 8px;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 2.25rem;
  align-items: center;
}
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}
.nav-links a:hover { color: var(--text-primary); }

.lang-switch { display: flex; align-items: center; gap: 0.35rem; color: var(--text-muted); }
.lang-switch button {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-family: var(--font-heading); font-size: 0.82rem; font-weight: 500;
  padding: 0.2rem 0.4rem; border-radius: 4px;
  transition: color 0.2s;
}
.lang-switch button:hover { color: var(--text-primary); }
.lang-switch button.active { color: var(--accent); }
.lang-switch .divider { color: var(--text-muted); }

/* ── Hero ──────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 11rem 0 6rem;
  overflow: hidden;
}


/* Perspective grid */
.hero-grid {
  position: absolute;
  bottom: 0;
  left: -10%;
  right: -10%;
  height: 55%;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(600px) rotateX(55deg);
  transform-origin: bottom center;
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 80%);
          mask-image: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 80%);
  pointer-events: none;
  z-index: 0;
  animation: gridScroll 8s linear infinite;
}

@keyframes gridScroll {
  0%   { background-position: 0 0; }
  100% { background-position: 0 60px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-grid { animation: none !important; }
}

/* Keep content above aurora layer */
.hero-container {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-title {
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  line-height: 1.08;
  font-weight: 500;
  margin: 1.5rem 0 1.5rem;
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 540px;
  margin-bottom: 2.25rem;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-metrics {
  margin-top: 3rem;
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.hero-metric .num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}
.hero-metric .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Hero browser mockup */
.hero-visual {
  position: relative;
  perspective: 1500px;
}
.app-window {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: rotateY(-4deg) rotateX(4deg);
  transition: transform 0.6s ease;
}
.app-window:hover { transform: rotateY(0deg) rotateX(0deg); }
.app-window-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.app-window-bar .dot { width: 10px; height: 10px; border-radius: 50%; background: #2A3553; }
.app-window-bar .dot.red    { background: #FF5F57; }
.app-window-bar .dot.yellow { background: #FEBC2E; }
.app-window-bar .dot.green  { background: #28C840; }
.app-window-bar .url {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.app-window img { display: block; width: 100%; height: auto; }

.hero-visual::after {
  content: "";
  position: absolute;
  inset: -30px;
  background: radial-gradient(60% 60% at 50% 50%, rgba(56,189,248,0.18), transparent 70%);
  z-index: -1;
  filter: blur(20px);
}

/* ── Trust bar ─────────────────────────────────────── */
.trust {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
}
.trust-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  align-items: center;
}
.trust-item {
  text-align: center;
  padding: 0 1rem;
  border-right: 1px solid var(--border);
}
.trust-item:last-child { border-right: none; }
.trust-item .num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}
.trust-item .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* ── Sections ──────────────────────────────────────── */
section { padding: 7rem 0; position: relative; }

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4.5rem;
}
.section-header .eyebrow { margin-bottom: 1.25rem; }
.section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
}


/* ── Why Alkera (feature grid with icons) ──────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transform-style: preserve-3d;
  /* transition sadece mouse leave için JS tarafından set edilir */
  will-change: transform;
}
/* Hover renk geçişini JS'den bağımsız tutuyoruz */
.feature-card:hover {
  border-color: var(--accent);
  background: var(--bg-elevated);
}
/* İçerik aurora'nın önünde görünsün */
.feature-card > * {
  position: relative;
  z-index: 1;
}
/* Kart üzerine ince ışık yansıması */
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    rgba(56, 189, 248, 0.08) 0%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 0;
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 1.25rem;
  border: 1px solid rgba(56,189,248,0.2);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.feature-card p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Module Showcase (tabbed) ──────────────────────── */
.modules { background: linear-gradient(180deg, transparent, rgba(56,189,248,0.03) 50%, transparent); }

.module-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 3rem;
  padding: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  max-width: max-content;
  margin-left: auto;
  margin-right: auto;
}
.module-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-body);
  white-space: nowrap;
}
.module-tab .tab-num {
  font-family: var(--font-heading);
  color: var(--text-muted);
  font-size: 0.78rem;
}
.module-tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.03); }
.module-tab.active {
  background: var(--gradient-accent);
  color: #06121f;
  font-weight: 600;
}
.module-tab.active .tab-num { color: rgba(6,18,31,0.6); }

.module-panel {
  display: none;
  grid-template-columns: 5fr 7fr;
  gap: 3rem;
  align-items: center;
}
.module-panel.active { display: grid; animation: panelIn 0.5s ease; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.module-info h3 {
  font-size: clamp(1.7rem, 2.5vw, 2.25rem);
  font-weight: 500;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.module-info p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.75rem;
}
.module-bullets { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.module-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
}
.module-bullets li::before {
  content: "";
  flex: 0 0 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 5px;
  background:
    var(--gradient-accent)
    url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23062032' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='20 6 9 17 4 12'/%3e%3c/svg%3e") center/12px no-repeat;
}

.module-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  box-shadow: var(--shadow-xl);
}
.module-visual::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(56,189,248,0.25), transparent 50%);
  pointer-events: none;
  mix-blend-mode: overlay;
}
.module-visual .app-window-bar { background: var(--bg-elevated); }
.module-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* ── CTA banner ────────────────────────────────────── */
.cta-banner {
  margin: 4rem auto 0;
  background: linear-gradient(135deg, rgba(56,189,248,0.12), rgba(99,102,241,0.12));
  border: 1px solid rgba(56,189,248,0.25);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.cta-banner h3 {
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.cta-banner p {
  color: var(--text-secondary);
  max-width: 560px;
}

/* ── Contact ───────────────────────────────────────── */
.contact { background: var(--bg-soft); border-top: 1px solid var(--border); }

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4rem;
  align-items: start;
}
.contact-info h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1.25rem;
  line-height: 1.15;
}
.contact-info p { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 2rem; }

.contact-channels { display: flex; flex-direction: column; gap: 1rem; }
.contact-channel {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.contact-channel .ico {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(56,189,248,0.2);
}
.contact-channel .ico svg { width: 18px; height: 18px; }
.contact-channel .label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.12em; }
.contact-channel .value { color: var(--text-primary); font-weight: 500; }

.contact-form-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-submit { width: 100%; margin-top: 0.5rem; padding: 1rem 1.5rem; }

/* ── Footer ────────────────────────────────────────── */
.footer { padding: 3rem 0; border-top: 1px solid var(--border); background: var(--bg-base); }
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer-bottom { color: var(--text-muted); font-size: 0.85rem; }

.social-icons { display: flex; gap: 1rem; }
.social-icons a {
  color: var(--text-muted);
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: inline-flex; align-items: center; justify-content: center;
  transition: all 0.2s ease;
}
.social-icons a:hover { color: var(--accent); border-color: var(--accent); }
.social-icons svg { width: 16px; height: 16px; }

/* ── Grid anomaly spotlight ────────────────────────── */
.grid-anomaly {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.15) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: 24px 24px; /* yarım hücre offset — anomali */
  -webkit-mask-image: radial-gradient(
    280px circle at var(--gx, -999px) var(--gy, -999px),
    black 0%, black 30%, transparent 100%
  );
  mask-image: radial-gradient(
    280px circle at var(--gx, -999px) var(--gy, -999px),
    black 0%, black 30%, transparent 100%
  );
}

/* ── Reduced motion ────────────────────────────────── */

/* ── Reveal ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.2, 0, 0, 1), transform 0.7s cubic-bezier(0.2, 0, 0, 1);
}
.reveal.active { opacity: 1; transform: translateY(0); }

.fade-in-up { opacity: 0; transform: translateY(20px); animation: fadeInUp 0.9s ease forwards; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* ── Select arrow ──────────────────────────────────── */
select {
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239AA8C2' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
}
select option { background: var(--bg-card); color: var(--text-primary); padding: 10px; }

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero { padding: 9rem 0 4rem; }
  .hero-container,
  .module-panel,
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-container { grid-template-columns: repeat(2, 1fr); gap: 2.5rem 1rem; }
  .trust-item:nth-child(2n) { border-right: none; }
  .app-window { transform: none; }
  section { padding: 5rem 0; }
}

@media (max-width: 720px) {
  .container { padding: 0 1.25rem; }
  .nav-links { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .module-tabs { padding: 0.35rem; gap: 0.2rem; }
  .module-tab { padding: 0.55rem 0.75rem; font-size: 0.8rem; }
  .module-tab .tab-num { display: none; }
  .cta-banner { padding: 2rem; flex-direction: column; align-items: flex-start; text-align: left; }
  .hero-cta { width: 100%; }
  .hero-cta .btn { flex: 1; }
}