/* =========================================================
   یکتا فناوران سپهر سلامت — Soft UI × Brand Gradient
   Logo: teal #2AB58E → blue #2D54B0
   ========================================================= */

:root {
  --brand-teal: #2ab58e;
  --brand-teal-deep: #0f766e;
  --brand-blue: #2d54b0;
  --brand-blue-deep: #1e3a8a;
  --gradient: linear-gradient(115deg, var(--brand-teal) 0%, #2496a8 48%, var(--brand-blue) 100%);
  --gradient-soft: linear-gradient(160deg, rgba(42, 181, 142, 0.14), rgba(45, 84, 176, 0.12));

  --bg: #f4fbf9;
  --bg-elevated: #ffffff;
  --fg: #0f2f35;
  --fg-muted: #4a6670;
  --border: rgba(15, 118, 110, 0.14);
  --ring: var(--brand-teal-deep);

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  --shadow-sm: 0 1px 2px rgba(15, 47, 53, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 47, 53, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 47, 53, 0.12);

  --radius: 1rem;
  --header-h: 4.25rem;
  --font: "Vazirmatn", "Tahoma", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 220ms;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font);
  font-weight: 400;
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 100% -10%, rgba(42, 181, 142, 0.12), transparent 55%),
    radial-gradient(900px 500px at -10% 30%, rgba(45, 84, 176, 0.1), transparent 50%),
    var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -100%;
  z-index: 1000;
  background: var(--fg);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background var(--duration) var(--ease), box-shadow var(--duration) var(--ease), backdrop-filter var(--duration) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(244, 251, 249, 0.86);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}

.site-header.is-hero-light .brand-name,
.site-header.is-hero-light .nav > a:not(.nav-cta) {
  color: #f5fffb;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35);
}

.site-header.is-hero-light:not(.is-scrolled) .nav-toggle span {
  background: #fff;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  cursor: pointer;
  min-width: 0;
}

.brand-logo {
  width: 3.1rem;
  height: auto;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 700;
  font-size: clamp(0.85rem, 1.8vw, 1rem);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--duration) var(--ease);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav > a {
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--fg-muted);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
  cursor: pointer;
}

.nav > a:hover,
.nav > a:focus-visible {
  color: var(--brand-teal-deep);
  background: rgba(42, 181, 142, 0.1);
  outline: none;
}

.nav-cta {
  background: var(--gradient) !important;
  color: #fff !important;
  box-shadow: 0 8px 20px rgba(45, 84, 176, 0.25);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  filter: brightness(1.05);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0.65rem;
  border-radius: 0.6rem;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--fg);
  border-radius: 2px;
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  border: 0;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease), filter var(--duration) var(--ease), background var(--duration) var(--ease);
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--ring) 45%, transparent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 12px 28px rgba(45, 84, 176, 0.28);
}

.btn-primary:hover {
  filter: brightness(1.06);
  box-shadow: 0 16px 36px rgba(45, 84, 176, 0.34);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-h) + 2rem) 0 5rem;
  color: #f7fffc;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.04);
  animation: heroZoom 18s var(--ease) forwards;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 24, 40, 0.55) 0%, rgba(8, 28, 48, 0.35) 40%, rgba(6, 30, 42, 0.78) 100%),
    linear-gradient(115deg, rgba(42, 181, 142, 0.28), rgba(45, 84, 176, 0.35));
}

.hero-flow {
  position: absolute;
  inset-inline: -20%;
  bottom: -30%;
  height: 55%;
  background: radial-gradient(ellipse at center, rgba(42, 181, 142, 0.35), transparent 65%);
  filter: blur(40px);
  animation: flowPulse 7s ease-in-out infinite alternate;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  margin-inline: auto 0;
  padding-bottom: 1rem;
}

.hero-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.hero-logo {
  width: clamp(5.5rem, 12vw, 7.5rem);
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.35));
}

.hero-brand-name {
  margin: 0;
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #ffffff;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.35);
}

.hero-title {
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 500;
  line-height: 1.7;
  color: rgba(245, 255, 251, 0.92);
  max-width: 28ch;
}

.hero-lead {
  margin: 0 0 1.75rem;
  font-size: 1rem;
  color: rgba(232, 244, 248, 0.82);
  max-width: 38ch;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 1.4rem;
  transform: translateX(-50%);
  width: 1.5rem;
  height: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 0.4rem;
  z-index: 2;
  cursor: pointer;
}

.hero-scroll-line {
  width: 2px;
  height: 0.55rem;
  background: #fff;
  border-radius: 2px;
  animation: scrollHint 1.6s var(--ease) infinite;
}

/* ---------- Sections ---------- */
.section {
  padding: var(--space-3xl) 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: 2.5rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-teal-deep);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow.light {
  background: linear-gradient(100deg, #9ef0d4, #9ec5ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0;
  color: var(--fg-muted);
  font-size: 1.05rem;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.about-copy p {
  color: var(--fg-muted);
  margin: 0 0 1rem;
}

.about-copy h2 {
  margin-bottom: 1.1rem;
}

.about-figure {
  margin: 0;
  border-radius: calc(var(--radius) + 0.25rem);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(42, 181, 142, 0.18), rgba(45, 84, 176, 0.12));
  pointer-events: none;
}

.about-figure img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

/* ---------- Services ---------- */
.services {
  background:
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.65) 12%, rgba(255, 255, 255, 0.65) 88%, transparent),
    var(--gradient-soft);
}

.services-showcase {
  display: grid;
  gap: 1.25rem;
}

.service-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 0;
  align-items: stretch;
  overflow: hidden;
  border-radius: calc(var(--radius) + 0.15rem);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: transform 280ms var(--ease), box-shadow 280ms var(--ease);
}

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

.service-feature:nth-child(even) {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
}

.service-feature:nth-child(even) .service-feature-media {
  order: 2;
}

.service-feature-media img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
}

.service-feature-body {
  padding: clamp(1.25rem, 3vw, 2.25rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.service-feature-body h3 {
  margin: 0 0 0.65rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.service-feature-body p {
  margin: 0;
  color: var(--fg-muted);
}

.service-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.service-list li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  padding: 1.15rem 1.1rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
}

.service-icon {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 0.75rem;
  background: var(--gradient);
  color: #fff;
}

.service-icon svg {
  width: 1.2rem;
  height: 1.2rem;
}

.service-list strong {
  display: block;
  margin-bottom: 0.15rem;
}

.service-list span {
  color: var(--fg-muted);
  font-size: 0.92rem;
}

/* ---------- Approach ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  counter-reset: none;
}

.steps li {
  padding: 1.5rem 1.35rem 1.6rem;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.steps li::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: var(--gradient);
}

.step-num {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.85rem;
}

.steps h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.steps p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ---------- Company ---------- */
.company {
  padding-top: 1rem;
}

.company-panel {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border-radius: calc(var(--radius) + 0.35rem);
  color: #eef9f6;
  background:
    linear-gradient(125deg, rgba(15, 118, 110, 0.92), rgba(45, 84, 176, 0.92)),
    url("../assets/service-network.jpg") center / cover;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.company-copy h2 {
  color: #fff;
}

.company-copy p {
  margin: 0;
  color: rgba(236, 250, 246, 0.88);
}

.company-copy strong {
  color: #fff;
}

.company-meta {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.company-meta > div {
  padding-block: 0.55rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.company-meta dt {
  font-size: 0.8rem;
  opacity: 0.75;
  margin-bottom: 0.2rem;
}

.company-meta dd {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

/* ---------- Contact ---------- */
.contact-inner {
  max-width: 40rem;
  margin-inline: auto;
  text-align: center;
}

.contact-inner .section-lead {
  margin-bottom: 2rem;
}

.contact-form {
  text-align: start;
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: calc(var(--radius) + 0.2rem);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

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

.contact-form label {
  display: grid;
  gap: 0.4rem;
}

.contact-form label > span {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--fg-muted);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.8rem 0.95rem;
  background: #fbfefe;
  color: var(--fg);
  transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--brand-teal);
  box-shadow: 0 0 0 4px rgba(42, 181, 142, 0.18);
}

.contact-form .btn {
  justify-self: start;
  margin-top: 0.25rem;
}

.form-note {
  margin: 0;
  min-height: 1.4em;
  font-size: 0.92rem;
  color: var(--brand-teal-deep);
}

.form-note.is-error {
  color: #b91c1c;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.55);
}

.footer-inner {
  display: grid;
  gap: 1.25rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-brand strong {
  display: block;
}

.footer-brand p {
  margin: 0.15rem 0 0;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--fg-muted);
  font-weight: 500;
  cursor: pointer;
}

.footer-nav a:hover {
  color: var(--brand-teal-deep);
}

.footer-copy {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms var(--ease), transform 650ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.delay-1 { transition-delay: 90ms; }
.delay-2 { transition-delay: 160ms; }
.delay-3 { transition-delay: 230ms; }

/* ---------- Animations ---------- */
@keyframes heroZoom {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}

@keyframes flowPulse {
  from { opacity: 0.55; transform: translateY(0); }
  to { opacity: 0.9; transform: translateY(-18px); }
}

@keyframes scrollHint {
  0% { transform: translateY(0); opacity: 1; }
  80% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid,
  .company-panel,
  .steps,
  .service-list {
    grid-template-columns: 1fr;
  }

  .service-feature,
  .service-feature:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .service-feature:nth-child(even) .service-feature-media {
    order: 0;
  }

  .service-feature-media img {
    min-height: 200px;
    aspect-ratio: 16 / 10;
  }

  .hero-content {
    margin-inline: auto;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-grid;
  }

  .nav {
    position: fixed;
    inset-inline: 1rem;
    top: calc(var(--header-h) + 0.5rem);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
  }

  .nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav > a {
    color: var(--fg-muted) !important;
    text-shadow: none !important;
  }

  .nav-cta {
    text-align: center;
  }

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

  .brand-name {
    max-width: 42vw;
  }

  .hero {
    align-items: center;
    padding-bottom: 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-img,
  .hero-flow,
  .hero-scroll-line {
    animation: none;
  }

  .service-feature:hover {
    transform: none;
  }
}