/* ===== Config: use CSS variables for theme ===== */
:root {
  --bg: #0f0f14;
  --surface: #1a1a24;
  --text: #e8e8ed;
  --text-muted: #9898a6;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --secondary: #3b82f6;
  --font-en: 'Inter', sans-serif;
  --font-fa: 'Vazirmatn', 'Inter', sans-serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

/* ===== Skip link (a11y + SEO) ===== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 1000;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 16px;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* ===== Base ===== */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-en);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

[lang="fa"] body {
  font-family: var(--font-fa);
}

[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] .hero-actions,
[dir="rtl"] .nav {
  flex-direction: row-reverse;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.lang-toggle {
  background: var(--surface);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
}

.lang-toggle:hover {
  background: rgba(255,255,255,0.06);
}

/* ===== Hero ===== */
.hero {
  padding: 48px 0 64px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-actions {
    justify-content: center;
  }
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 16px;
  line-height: 1.25;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin: 0 0 28px;
  max-width: 480px;
}

[dir="rtl"] .hero-subtitle {
  max-width: 100%;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
}

.hero-media {
  position: relative;
}

.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--surface);
}

.video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-caption {
  margin: 10px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ===== Features ===== */
.features {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  font-size: 1.75rem;
  margin: 0 0 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}

.feature-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== CTA ===== */
.cta {
  padding: 64px 0;
}

.cta-inner {
  text-align: center;
  background: var(--surface);
  padding: 48px 32px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}

.cta-title {
  margin: 0 0 12px;
  font-size: 1.5rem;
}

.cta-text {
  color: var(--text-muted);
  margin: 0 0 24px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.cta-inner .btn {
  margin: 0 8px 8px 0;
}

[dir="rtl"] .cta-inner .btn {
  margin: 0 0 8px 8px;
}

/* ===== Footer ===== */
.footer {
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-text {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Modal (Trial form) ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.2s, opacity 0.2s;
}

.modal[aria-hidden="false"] {
  visibility: visible;
  opacity: 1;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
}

.modal-box {
  position: relative;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
}

.modal-title {
  margin: 0 0 8px;
  font-size: 1.35rem;
}

.modal-desc {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.trial-form label {
  display: block;
  margin: 12px 0 4px;
  font-size: 0.9rem;
  font-weight: 500;
}

.trial-form label:first-of-type {
  margin-top: 0;
}

.trial-form input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.trial-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.form-error {
  margin: 10px 0 0;
  color: #ef4444;
  font-size: 0.9rem;
}

.modal-actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.modal-actions .btn {
  flex: 1;
  min-width: 120px;
}