/* =========================================================
   سمیم — Landing (همراه با لینک داکا)
========================================================= */
@font-face {
  font-family: 'Dinar';
  src: url('../assets/fonts/Dinar.ttf') format('truetype');
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: 'IRANYekanX';
  src: url('../assets/fonts/IRANYekanX-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}

:root {
  --void: #04070a;

  --samanet-deep: #06231d;
  --samanet-mid: #0e5646;
  --samanet-accent: #2fe0ac;
  --samanet-accent-2: #7cf0cf;
  --samanet-text: #eafbf4;
  --samanet-muted: #a9d9c9;

  --nazemnet-deep: #050f22;
  --nazemnet-mid: #14459b;
  --nazemnet-accent: #4c8fff;
  --nazemnet-accent-2: #8fbaff;
  --nazemnet-text: #eaf2ff;
  --nazemnet-muted: #a9c2ea;

  --glass-fill: rgba(255, 255, 255, 0.08);
  --glass-fill-hi: rgba(255, 255, 255, 0.17);
  --glass-border: rgba(255, 255, 255, 0.28);

  --header-h: 250px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  background: var(--void);
  color: #fff;
  font-family: 'IRANYekanX', system-ui, sans-serif;
  overflow-x: hidden;
  position: relative;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 20;
  padding: 1.6rem 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(3, 6, 5, 0.65) 0%, rgba(3, 6, 5, 0.28) 60%, transparent 100%);
}
.site-header__mark {
  width: 190px;
  height: 190px;
  object-fit: contain;
  filter: drop-shadow(0 10px 32px rgba(0, 0, 0, .5));
}
.site-header__tagline {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 400;
  color: rgba(255, 255, 255, .86);
  letter-spacing: .01em;
}

/* ===== Split layout ===== */
.split {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 100dvh;
}

.split__seam {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 50%;
  width: 1px;
  transform: translateX(50%);
  background: linear-gradient(to bottom,
      transparent,
      color-mix(in srgb, var(--samanet-accent) 55%, var(--nazemnet-accent) 45%),
      transparent);
  opacity: .6;
  z-index: 5;
  pointer-events: none;
}

.panel {
  position: relative;
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 2.5rem 1.75rem;
  overflow: hidden;
  isolation: isolate;
  transition: filter .5s var(--ease);
}

.panel__net {
  position: absolute;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  opacity: .55;
}

.panel__glow {
  position: absolute;
  inset: -10%;
  z-index: -2;
  opacity: .8;
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(60% 55% at 50% 46%, rgba(0, 0, 0, .34) 0%, transparent 72%);
  pointer-events: none;
}

.panel--samanet {
  background:
    radial-gradient(130% 95% at 100% 105%, var(--samanet-mid) 0%, transparent 58%),
    radial-gradient(90% 70% at -10% -10%, color-mix(in srgb, var(--samanet-accent) 22%, transparent) 0%, transparent 55%),
    linear-gradient(155deg, var(--samanet-deep) 0%, #041912 62%, var(--void) 100%);
}
.panel--samanet .panel__glow {
  background: radial-gradient(closest-side, color-mix(in srgb, var(--samanet-accent) 38%, transparent) 0%, transparent 72%);
  transform: translate(-6%, 6%);
}
.panel--nazemnet {
  background:
    radial-gradient(130% 95% at 0% 105%, var(--nazemnet-mid) 0%, transparent 58%),
    radial-gradient(90% 70% at 110% -10%, color-mix(in srgb, var(--nazemnet-accent) 22%, transparent) 0%, transparent 55%),
    linear-gradient(205deg, var(--nazemnet-deep) 0%, #040c1b 62%, var(--void) 100%);
}
.panel--nazemnet .panel__glow {
  background: radial-gradient(closest-side, color-mix(in srgb, var(--nazemnet-accent) 38%, transparent) 0%, transparent 72%);
  transform: translate(6%, 6%);
}

.panel:hover .panel__glow {
  opacity: 1;
}
.panel:hover {
  filter: brightness(1.07);
}
.split:has(.panel:hover) .panel:not(:hover) {
  filter: brightness(.88) saturate(.88);
}

.panel__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.panel__title {
  font-family: 'Dinar', 'IRANYekanX', sans-serif;
  margin: 0 0 .6rem;
  font-size: clamp(2.4rem, 4vw + 1rem, 3.6rem);
  font-weight: 700;
  letter-spacing: 0em;
}
.panel--samanet .panel__title {
  color: var(--samanet-text);
}
.panel--nazemnet .panel__title {
  color: var(--nazemnet-text);
}

.panel__subtitle {
  margin: 0 0 .9rem;
  font-size: clamp(.95rem, .5vw + .85rem, 1.1rem);
  font-weight: 400;
}
.panel--samanet .panel__subtitle {
  color: var(--samanet-accent-2);
}
.panel--nazemnet .panel__subtitle {
  color: var(--nazemnet-accent-2);
}

.panel__desc {
  margin: 0 0 2.3rem;
  font-size: .94rem;
  font-weight: 400;
  line-height: 1.9;
}
.panel--samanet .panel__desc {
  color: var(--samanet-muted);
}
.panel--nazemnet .panel__desc {
  color: var(--nazemnet-muted);
}

.panel__cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.35rem 3.4rem;
  border-radius: 18px;
  font-size: 1.15rem;
  font-weight: 500;
  color: #fff;
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .32), inset 0 1px 0 rgba(255, 255, 255, .2);
  transition: background .35s var(--ease), box-shadow .4s var(--ease), transform .35s var(--ease), border-color .35s var(--ease);
  min-width: 230px;
  overflow: hidden;
}
.panel__cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, .22) 48%, transparent 66%);
  transform: translateX(-120%);
  transition: transform .7s var(--ease);
}
.panel:hover .panel__cta::before {
  transform: translateX(120%);
}

.panel:hover .panel__cta,
.panel:focus-visible .panel__cta {
  background: var(--glass-fill-hi);
  transform: translateY(-4px) scale(1.035);
}
.panel--samanet:hover .panel__cta {
  box-shadow: 0 16px 40px color-mix(in srgb, var(--samanet-accent) 38%, transparent), inset 0 1px 0 rgba(255, 255, 255, .24);
  border-color: color-mix(in srgb, var(--samanet-accent) 65%, var(--glass-border));
}
.panel--nazemnet:hover .panel__cta {
  box-shadow: 0 16px 40px color-mix(in srgb, var(--nazemnet-accent) 38%, transparent), inset 0 1px 0 rgba(255, 255, 255, .24);
  border-color: color-mix(in srgb, var(--nazemnet-accent) 65%, var(--glass-border));
}
.panel:active .panel__cta {
  transform: translateY(-1px) scale(1.0);
}

.panel:focus-visible {
  outline: 2px solid #fff;
  outline-offset: -6px;
}

/* =========================================================
   DAKA FOOTER LINK — مرکزی، پایین صفحه
========================================================= */
.daka-footer {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  pointer-events: auto;
  text-align: center;
  width: max-content;
  max-width: 90vw;
  background: rgba(10, 16, 22, 0.55);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 60px;
  padding: 0.65rem 2rem;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, transform .3s ease;
  font-size: 0.95rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.daka-footer:hover {
  background: rgba(18, 30, 40, 0.75);
  border-color: rgba(47, 224, 172, 0.6);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(47, 224, 172, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transform: translateX(-50%) scale(1.02);
  color: #fff;
}
.daka-footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: inherit;
  text-decoration: none;
}
.daka-footer a::after {
  content: "↗";
  font-size: 0.85em;
  opacity: 0.8;
  transition: transform .25s ease, opacity .25s ease;
}
.daka-footer a:hover::after {
  transform: translate(2px, -2px);
  opacity: 1;
}
.daka-footer .daka-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #2fe0ac;
  margin-inline-end: 6px;
  box-shadow: 0 0 8px #2fe0ac;
  animation: pulse-dot 2.4s infinite;
}
@keyframes pulse-dot {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1); }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .panel__title {
    font-size: clamp(2rem, 5.5vw, 2.7rem);
  }
  .panel__content {
    max-width: 360px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 132px;
  }
  .site-header {
    padding: 1.1rem 1rem .8rem;
  }
  .site-header__mark {
    width: 84px;
    height: 84px;
  }
  .site-header__tagline {
    font-size: .82rem;
  }

  .split {
    flex-direction: column;
  }
  .split__seam {
    right: 0;
    left: 0;
    top: 50%;
    bottom: auto;
    width: auto;
    height: 1px;
    transform: translateY(-50%);
    background: linear-gradient(to right, transparent, color-mix(in srgb, var(--samanet-accent) 55%, var(--nazemnet-accent) 45%), transparent);
  }
  .panel {
    min-height: auto;
    flex-basis: auto;
    padding: 2.2rem 1.4rem;
  }
  .panel:first-child {
    padding-top: calc(var(--header-h) + 1.4rem);
  }
  .split:has(.panel:hover) .panel:not(:hover) {
    filter: none;
  }
  .panel__desc {
    margin-bottom: 1.7rem;
    font-size: .9rem;
  }
  .panel__cta {
    width: 100%;
    max-width: 340px;
    padding: 1.2rem 1.6rem;
    font-size: 1.05rem;
  }

  /* داکا در موبایل کمی بالاتر و کوچک‌تر */
  .daka-footer {
    bottom: 12px;
    font-size: 0.78rem;
    padding: 0.5rem 1.2rem;
    white-space: normal;
    max-width: 92vw;
    border-radius: 40px;
    line-height: 1.5;
  }
  .daka-footer .daka-dot {
    width: 5px;
    height: 5px;
  }
}

@media (max-width: 380px) {
  .site-header__mark {
    width: 84px;
    height: 84px;
  }
  .daka-footer {
    font-size: 0.7rem;
    padding: 0.4rem 1rem;
  }
}

@media (min-width: 721px) and (max-height: 760px) {
  .site-header__mark {
    width: 130px;
    height: 130px;
  }
  .site-header__tagline {
    font-size: 1.02rem;
  }
  .panel {
    padding-top: calc(var(--header-h) - 60px);
  }
  .daka-footer {
    bottom: 10px;
    font-size: 0.82rem;
    padding: 0.45rem 1.4rem;
  }
}
@media (max-width: 720px) and (max-height: 760px) {
  .panel:first-child {
    padding-top: calc(var(--header-h) - 20px);
  }
}