/* index.css */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color_bg: #050816;
  --color_bg_elevated: #0f172a;
  --color_bg_soft: #020617;

  --color_border_subtle: rgba(148, 163, 184, 0.16);

  --color_accent: #22c55e;
  --color_accent_soft: rgba(34, 197, 94, 0.18);

  --color_text: #e5e7eb;
  --color_text_soft: #9ca3af;
  --color_text_muted: #6b7280;
  --color_text_on_accent: #020617;

  --shadow_soft: 0 18px 45px rgba(15, 23, 42, 0.85);
  --shadow_header: 0 14px 40px rgba(15, 23, 42, 0.75);

  --radius_large: 24px;
  --radius_medium: 16px;
  --radius_small: 999px;

  --space_unit: 0.25rem;

  --font_heading: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font_body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --transition_fast: 160ms ease-out;
  --transition_slow: 320ms cubic-bezier(0.16, 1, 0.3, 1);

  --focus_ring: 0 0 0 3px rgba(56, 189, 248, 0.35);

  color-scheme: dark;
}

html[data-theme="light"] {
  --color_bg: #f9fafb;
  --color_bg_elevated: #ffffff;
  --color_bg_soft: #f3f4f6;

  --color_border_subtle: rgba(15, 23, 42, 0.08);

  --color_accent: #16a34a;
  --color_accent_soft: rgba(22, 163, 74, 0.08);

  --color_text: #020617;
  --color_text_soft: #4b5563;
  --color_text_muted: #6b7280;
  --color_text_on_accent: #f9fafb;

  --shadow_soft: 0 18px 45px rgba(15, 23, 42, 0.08);
  --shadow_header: 0 10px 30px rgba(15, 23, 42, 0.06);

  --focus_ring: 0 0 0 3px rgba(56, 189, 248, 0.22);

  color-scheme: light;
}

html { scroll-behavior: smooth; }

body.body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font_body);
  background-color: var(--color_bg);
  color: var(--color_text);
  position: relative;
  overflow-x: hidden;
}

/* Skip link */
.skip_link {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--color_bg_elevated);
  border: 1px solid var(--color_border_subtle);
  color: var(--color_text);
  text-decoration: none;
  transform: translateY(-140%);
  transition: transform var(--transition_slow);
}
.skip_link:focus {
  transform: translateY(0);
  outline: none;
  box-shadow: var(--focus_ring);
}

/* Global layout */
.layout_container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: calc(var(--space_unit) * 4);
  padding-right: calc(var(--space_unit) * 4);
}

.main { padding-top: 84px; }

a, button { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible {
  outline: none;
  box-shadow: var(--focus_ring);
  border-radius: 12px;
}

/* Background decoration */
.page_background_decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.page_background_decor_blob {
  position: absolute;
  border-radius: 999px;
  filter: blur(64px);
  opacity: 0.3;
}

.page_background_decor_blob_one {
  width: 430px;
  height: 430px;
  background: radial-gradient(circle at 30% 20%, #22c55e, transparent 70%);
  top: -120px;
  left: -120px;
}

.page_background_decor_blob_two {
  width: 480px;
  height: 480px;
  background: radial-gradient(circle at 80% 80%, #38bdf8, transparent 70%);
  bottom: -180px;
  right: -160px;
}

/* subtle grid (premium feel) */
.page_background_decor_grid {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image:
    linear-gradient(to right, rgba(148, 163, 184, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 50% 20%, rgba(0,0,0,0.9), transparent 68%);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(
      to bottom,
      rgba(2, 6, 23, 0.92),
      rgba(2, 6, 23, 0.8),
      transparent
  );
}

html[data-theme="light"] .header {
  background: linear-gradient(
      to bottom,
      rgba(249, 250, 251, 0.92),
      rgba(249, 250, 251, 0.86),
      transparent
  );
}

.header_nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: calc(var(--space_unit) * 4);
  padding-bottom: calc(var(--space_unit) * 4);
  transition: box-shadow var(--transition_slow), padding var(--transition_slow), background var(--transition_slow);
}

.header_nav_logo {
  display: inline-flex;
  flex-direction: column;
  gap: calc(var(--space_unit) * 1);
  text-decoration: none;
  color: inherit;
}

.header_nav_logo_main {
  font-family: var(--font_heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.header_nav_logo_sub {
  font-size: 0.75rem;
  color: var(--color_text_soft);
}

.header_nav_menu {
  display: flex;
  align-items: center;
  gap: calc(var(--space_unit) * 6);
}

.header_nav_menu_item {
  position: relative;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--color_text_soft);
  padding-block: calc(var(--space_unit) * 2);
  transition: color var(--transition_fast), transform var(--transition_fast);
}

.header_nav_menu_item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(var(--space_unit) * 1);
  height: 2px;
  transform: scaleX(0);
  transform-origin: center;
  background: linear-gradient(90deg, #22c55e, #38bdf8);
  border-radius: 999px;
  transition: transform var(--transition_slow);
}

.header_nav_menu_item:hover,
.header_nav_menu_item:focus-visible {
  color: var(--color_text);
  transform: translateY(-1px);
}

.header_nav_menu_item:hover::after,
.header_nav_menu_item:focus-visible::after {
  transform: scaleX(1);
}

/* active section highlight */
.header_nav_menu_item.nav_active {
  color: var(--color_text);
}
.header_nav_menu_item.nav_active::after {
  transform: scaleX(1);
}

/* Header actions */
.header_nav_actions {
  display: flex;
  align-items: center;
  gap: calc(var(--space_unit) * 3);
}

.header_nav_lang_switcher {
  display: inline-flex;
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  padding: calc(var(--space_unit) * 1);
  background-color: rgba(15, 23, 42, 0.6);
}

html[data-theme="light"] .header_nav_lang_switcher {
  background-color: rgba(255, 255, 255, 0.8);
}

.header_nav_lang_button {
  border: none;
  background: transparent;
  color: var(--color_text_soft);
  font-size: 0.75rem;
  padding: calc(var(--space_unit) * 1.5) calc(var(--space_unit) * 3);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color var(--transition_fast), color var(--transition_fast), transform var(--transition_fast);
}

.header_nav_lang_button:hover { transform: translateY(-1px); }
.header_nav_lang_button_active {
  background: var(--color_accent_soft);
  color: var(--color_accent);
}

.header_nav_theme_toggle {
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.7);
  color: var(--color_text_soft);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition_fast), color var(--transition_fast), transform var(--transition_fast), border-color var(--transition_fast);
}

html[data-theme="light"] .header_nav_theme_toggle {
  background: rgba(255, 255, 255, 0.9);
}

.header_nav_theme_toggle:hover {
  transform: translateY(-1px);
  color: var(--color_accent);
  border-color: rgba(56, 189, 248, 0.45);
}

.header_nav_menu_button {
  display: none;
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.8);
  width: 40px;
  height: 40px;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: background var(--transition_fast), transform var(--transition_fast), border-color var(--transition_fast);
}

html[data-theme="light"] .header_nav_menu_button {
  background: rgba(255, 255, 255, 0.9);
}

.header_nav_menu_button_bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color_text);
  transition: transform var(--transition_slow), opacity var(--transition_slow), width var(--transition_slow);
}

.header_nav_menu_button_open .header_nav_menu_button_bar:first-child {
  transform: translateY(7px) rotate(45deg);
  width: 20px;
}

.header_nav_menu_button_open .header_nav_menu_button_bar:last-child {
  transform: translateY(-7px) rotate(-45deg);
  width: 20px;
}

.header_nav_menu_button_open .header_nav_menu_button_bar:nth-child(2) {
  opacity: 0;
}

/* Header scrolled */
.body.header_scrolled .header_nav {
  box-shadow: var(--shadow_header);
  padding-top: calc(var(--space_unit) * 3);
  padding-bottom: calc(var(--space_unit) * 3);
  background: linear-gradient(
    to bottom,
    rgba(2, 6, 23, 0.98),
    rgba(2, 6, 23, 0.96),
    rgba(2, 6, 23, 0.94)
  );
}

html[data-theme="light"] .body.header_scrolled .header_nav {
  background: linear-gradient(
    to bottom,
    rgba(249, 250, 251, 0.98),
    rgba(249, 250, 251, 0.96),
    rgba(249, 250, 251, 0.94)
  );
}

/* HERO */
.hero_section {
  padding-top: calc(var(--space_unit) * 16);
  padding-bottom: calc(var(--space_unit) * 18);
}

.hero_section_inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: calc(var(--space_unit) * 14);
  align-items: center;
}

.hero_section_kicker {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color_text_muted);
  margin-bottom: calc(var(--space_unit) * 3);
}

.hero_section_title {
  font-family: var(--font_heading);
  font-size: clamp(2.2rem, 2.6vw + 1.4rem, 3.2rem);
  line-height: 1.08;
  margin: 0 0 calc(var(--space_unit) * 4);
}

.hero_title_gradient {
  background: linear-gradient(90deg, #22c55e, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero_section_subtitle {
  margin: 0 0 calc(var(--space_unit) * 6);
  font-size: 0.98rem;
  color: var(--color_text_soft);
  max-width: 36rem;
}

.hero_section_cta_group {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 4);
  margin-bottom: calc(var(--space_unit) * 8);
}

.hero_section_cta_button {
  font-size: 0.9rem;
  border-radius: 999px;
  padding: calc(var(--space_unit) * 3) calc(var(--space_unit) * 7);
  border-width: 1px;
  border-style: solid;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: calc(var(--space_unit) * 2);
  line-height: 1;
  transition: background var(--transition_slow), color var(--transition_slow), transform var(--transition_slow), box-shadow var(--transition_slow), border-color var(--transition_slow);
}

.button_arrow {
  display: inline-block;
  transform: translateX(0);
  transition: transform var(--transition_fast);
}

.hero_section_cta_button_primary {
  background: linear-gradient(135deg, #22c55e, #38bdf8);
  border-color: transparent;
  color: var(--color_text_on_accent);
  box-shadow: 0 18px 45px rgba(34, 197, 94, 0.35);
}

.hero_section_cta_button_primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 60px rgba(34, 197, 94, 0.45);
}
.hero_section_cta_button_primary:hover .button_arrow {
  transform: translateX(4px);
}

.hero_section_cta_button_secondary {
  background: transparent;
  border-color: var(--color_border_subtle);
  color: var(--color_text_soft);
}

.hero_section_cta_button_secondary:hover {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(148, 163, 184, 0.4);
  transform: translateY(-2px);
}

html[data-theme="light"] .hero_section_cta_button_secondary:hover {
  background: rgba(15, 23, 42, 0.04);
}

.hero_section_meta {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 6);
  margin-bottom: calc(var(--space_unit) * 10);
}

.hero_section_meta_item {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space_unit) * 1);
}

.hero_section_meta_label {
  font-size: 0.75rem;
  color: var(--color_text_muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.hero_section_meta_value {
  font-size: 0.9rem;
  color: var(--color_text_soft);
}

.hero_section_scroll_indicator {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--space_unit) * 3);
}

.hero_section_scroll_indicator_text {
  font-size: 0.8rem;
  color: var(--color_text_muted);
}

.hero_section_scroll_indicator_icon {
  width: 34px;
  height: 52px;
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  display: inline-flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: calc(var(--space_unit) * 3);
  position: relative;
}

.hero_section_scroll_indicator_dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color_accent);
  animation: hero_scroll_indicator_bounce 1.6s infinite;
}

@keyframes hero_scroll_indicator_bounce {
  0% { transform: translateY(0); opacity: 0.3; }
  40% { transform: translateY(18px); opacity: 1; }
  100% { transform: translateY(0); opacity: 0.1; }
}

/* Hero visual */
.hero_section_visual { display: flex; justify-content: flex-end; }

.hero_section_visual_card {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius_large);
  background:
    radial-gradient(circle at 10% 0%, rgba(34, 197, 94, 0.2), transparent 60%),
    radial-gradient(circle at 100% 100%, rgba(56, 189, 248, 0.3), transparent 60%),
    linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(2, 6, 23, 0.98));
  padding: calc(var(--space_unit) * 5) calc(var(--space_unit) * 5) calc(var(--space_unit) * 4);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--shadow_soft);
  display: flex;
  flex-direction: column;
  gap: calc(var(--space_unit) * 4);
  transform: translateZ(0);
  transition: transform var(--transition_slow);
}

.hero_section_visual_card:hover {
  transform: translateY(-4px);
}

html[data-theme="light"] .hero_section_visual_card {
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 197, 94, 0.12), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(56, 189, 248, 0.18), transparent 58%),
    linear-gradient(145deg, #f9fafb, #ffffff);
}

.hero_section_visual_header { display: flex; align-items: center; justify-content: space-between; }

.hero_section_visual_badge {
  font-size: 0.75rem;
  padding: calc(var(--space_unit) * 2) calc(var(--space_unit) * 4);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.35);
  color: var(--color_text_soft);
}

html[data-theme="light"] .hero_section_visual_badge { background: rgba(249, 250, 251, 0.8); }

.hero_section_visual_status {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4);
  animation: hero_visual_status_pulse 1.7s infinite;
}

@keyframes hero_visual_status_pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.45); }
  70% { box-shadow: 0 0 0 12px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero_section_visual_body {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: calc(var(--space_unit) * 4);
}

.hero_section_visual_device {
  border-radius: 20px;
  padding: calc(var(--space_unit) * 3);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.45);
}

html[data-theme="light"] .hero_section_visual_device {
  background: rgba(249, 250, 251, 0.96);
}

.hero_section_visual_device_desktop { width: 74%; }
.hero_section_visual_device_mobile { width: 26%; padding: calc(var(--space_unit) * 2.5); border-radius: 18px; }

.hero_section_visual_device_screen {
  border-radius: 14px;
  overflow: hidden;
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 197, 94, 0.22), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(56, 189, 248, 0.3), transparent 60%),
    #020617;
  position: relative;
  padding: calc(var(--space_unit) * 4);
}

html[data-theme="light"] .hero_section_visual_device_screen {
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 197, 94, 0.12), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(56, 189, 248, 0.14), transparent 60%),
    #0f172a;
}

.hero_section_visual_gradient {
  position: absolute;
  inset: 0;
  opacity: 0.72;
  background:
    radial-gradient(circle at 10% 0%, rgba(34, 197, 94, 0.86), transparent 52%),
    radial-gradient(circle at 82% 100%, rgba(56, 189, 248, 0.9), transparent 56%);
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero_section_visual_line {
  position: relative;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.8);
  overflow: hidden;
  margin-bottom: calc(var(--space_unit) * 3);
}

.hero_section_visual_line_one { height: 10px; width: 70%; }
.hero_section_visual_line_two { height: 10px; width: 52%; }
.hero_section_visual_line_three { height: 10px; width: 84%; margin-bottom: 0; }

.hero_section_visual_line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(34, 197, 94, 0.1), rgba(56, 189, 248, 0.7), rgba(34, 197, 94, 0.1));
  transform: translateX(-100%);
  animation: hero_visual_shimmer 2.1s infinite;
}

@keyframes hero_visual_shimmer {
  0% { transform: translateX(-100%); }
  60% { transform: translateX(100%); }
  100% { transform: translateX(100%); }
}

.hero_section_visual_pill {
  height: 14px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.8);
  margin-bottom: calc(var(--space_unit) * 3);
  width: 88%;
}

.hero_section_visual_pill_small { width: 64%; }
.hero_section_visual_pill_tiny { width: 40%; margin-bottom: 0; }

.hero_section_visual_footer { font-size: 0.8rem; color: var(--color_text_soft); }

/* Section headers */
.section_header { margin-bottom: calc(var(--space_unit) * 10); }

.section_header_kicker {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color_text_muted);
  margin-bottom: calc(var(--space_unit) * 2);
}

.section_header_title {
  font-family: var(--font_heading);
  font-size: 1.7rem;
  margin: 0 0 calc(var(--space_unit) * 4);
}

.section_header_subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color_text_soft);
  max-width: 38rem;
}

/* About */
.about_section { padding-bottom: calc(var(--space_unit) * 18); }

.about_section_grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: calc(var(--space_unit) * 10);
  align-items: flex-start;
}

.about_section_paragraph {
  font-size: 0.96rem;
  color: var(--color_text_soft);
  margin-top: 0;
  margin-bottom: calc(var(--space_unit) * 4);
}

.about_section_highlights {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 6);
  margin-top: calc(var(--space_unit) * 5);
}

.about_section_highlights_value {
  font-family: var(--font_heading);
  font-size: 1.3rem;
}

.about_section_highlights_label {
  font-size: 0.82rem;
  color: var(--color_text_muted);
}

.about_section_side_title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color_text_muted);
  margin: 0 0 calc(var(--space_unit) * 3);
}

.about_section_side_title_team { margin-top: calc(var(--space_unit) * 8); }

.about_section_tech_row {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 4);
  margin-bottom: calc(var(--space_unit) * 2);
}

.about_section_tech_item {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--space_unit) * 2);
  padding: calc(var(--space_unit) * 2.5) calc(var(--space_unit) * 4);
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.7);
  font-size: 0.82rem;
  color: var(--color_text_soft);
  transition: transform var(--transition_fast), border-color var(--transition_fast), background var(--transition_fast);
}

html[data-theme="light"] .about_section_tech_item { background: rgba(255, 255, 255, 0.9); }

.about_section_tech_item:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.45);
  background: rgba(15, 23, 42, 0.85);
}

html[data-theme="light"] .about_section_tech_item:hover {
  background: rgba(249, 250, 251, 0.95);
}

.about_section_tech_item i {
  font-size: 0.95rem;
  color: var(--color_accent);
}

.about_section_team {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space_unit) * 4);
}

.about_section_team_card {
  display: flex;
  gap: calc(var(--space_unit) * 4);
  padding: calc(var(--space_unit) * 4);
  border-radius: var(--radius_medium);
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(14px);
  transition: transform var(--transition_slow), border-color var(--transition_slow), box-shadow var(--transition_slow);
}

html[data-theme="light"] .about_section_team_card { background: rgba(255, 255, 255, 0.9); }

.about_section_team_card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.35);
}

html[data-theme="light"] .about_section_team_card:hover {
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.10);
}

.about_section_team_avatar_placeholder {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: linear-gradient(135deg, #22c55e, #38bdf8);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--color_text_on_accent);
  font-weight: 600;
}

.about_section_team_name {
  margin: 0 0 calc(var(--space_unit) * 1);
  font-size: 0.95rem;
  font-weight: 600;
}

.about_section_team_role {
  margin: 0 0 calc(var(--space_unit) * 2);
  font-size: 0.84rem;
  color: var(--color_text_muted);
}

.about_section_team_tagline {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color_text_soft);
}

/* Projects */
.projects_section { padding-bottom: calc(var(--space_unit) * 18); }

.projects_section_filters {
  display: inline-flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 2);
  padding: calc(var(--space_unit) * 2);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--color_border_subtle);
  margin-bottom: calc(var(--space_unit) * 8);
}

html[data-theme="light"] .projects_section_filters { background: rgba(255, 255, 255, 0.9); }

.projects_section_filters_button {
  border-radius: 999px;
  border: none;
  padding: calc(var(--space_unit) * 2.5) calc(var(--space_unit) * 5.5);
  font-size: 0.83rem;
  background: transparent;
  color: var(--color_text_soft);
  cursor: pointer;
  transition: background var(--transition_fast), color var(--transition_fast), transform var(--transition_fast);
  line-height: 1;
}

.projects_section_filters_button:hover { transform: translateY(-1px); }
.projects_section_filters_button_active {
  background: var(--color_accent_soft);
  color: var(--color_accent);
}

.projects_section_grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--space_unit) * 6);
}

.projects_section_card {
  border-radius: var(--radius_medium);
  border: 1px solid var(--color_border_subtle);
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 197, 94, 0.15), transparent 60%),
    rgba(15, 23, 42, 0.9);
  padding: calc(var(--space_unit) * 5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.9);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--transition_slow), box-shadow var(--transition_slow), border-color var(--transition_slow), background var(--transition_slow);
}

html[data-theme="light"] .projects_section_card {
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 197, 94, 0.08), transparent 60%),
    #ffffff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.projects_section_card::before {
  content: "";
  position: absolute;
  inset: -40%;
  opacity: 0;
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.55), transparent 60%);
  transform: translate3d(-50px, 40px, 0);
  transition: opacity var(--transition_slow), transform var(--transition_slow);
  z-index: -1;
}

.projects_section_card_title {
  margin: 0 0 calc(var(--space_unit) * 3);
  font-size: 1.05rem;
  font-family: var(--font_heading);
}

.projects_section_card_description {
  margin: 0 0 calc(var(--space_unit) * 4);
  font-size: 0.9rem;
  color: var(--color_text_soft);
}

.projects_section_card_tags {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space_unit) * 2);
}

.projects_section_card_tag {
  font-size: 0.75rem;
  padding: calc(var(--space_unit) * 1.5) calc(var(--space_unit) * 3.5);
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--color_text_muted);
  background: rgba(15, 23, 42, 0.7);
}

html[data-theme="light"] .projects_section_card_tag { background: rgba(249, 250, 251, 0.95); }

.projects_section_card_footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--space_unit) * 4);
}

.projects_section_card_link {
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--color_text_soft);
  display: inline-flex;
  align-items: center;
  gap: calc(var(--space_unit) * 2);
  position: relative;
  transition: color var(--transition_fast), transform var(--transition_fast);
}

.projects_section_card_link::after {
  content: "↗";
  font-size: 0.75rem;
  opacity: 0.7;
}

.projects_section_card_link:hover {
  color: var(--color_text);
  transform: translateY(-1px);
}

.projects_section_card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.95);
  border-color: rgba(56, 189, 248, 0.5);
}

html[data-theme="light"] .projects_section_card:hover {
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.16);
}

.projects_section_card:hover::before {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.projects_section_card_hidden { display: none; }

/* FAQ */
.faq_section { padding-bottom: calc(var(--space_unit) * 18); }

.faq_section_list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space_unit) * 3);
}

.faq_section_item {
  border-radius: var(--radius_medium);
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.9);
  padding: calc(var(--space_unit) * 3) calc(var(--space_unit) * 4);
  transition: border-color var(--transition_slow), transform var(--transition_slow);
}

html[data-theme="light"] .faq_section_item { background: rgba(255, 255, 255, 0.98); }

.faq_section_item:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.35);
}

.faq_section_item_question {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--color_text);
  font-family: var(--font_heading);
  font-size: 0.95rem;
  padding: calc(var(--space_unit) * 3) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--space_unit) * 4);
  cursor: pointer;
}

.faq_section_item_question::after {
  content: "+";
  font-size: 1.1rem;
  color: var(--color_text_muted);
  flex-shrink: 0;
  transition: transform var(--transition_slow), color var(--transition_slow);
}

.faq_section_item_question_expanded::after {
  transform: rotate(45deg);
  color: var(--color_accent);
}

.faq_section_item_answer_wrapper { padding-bottom: calc(var(--space_unit) * 3); }
.faq_section_item_answer { margin: 0; font-size: 0.9rem; color: var(--color_text_soft); }

/* CONTACT */
.contact_section { padding-bottom: calc(var(--space_unit) * 20); }

.contact_simple {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
  padding-top: calc(var(--space_unit) * 6);
}

.contact_simple_text {
  font-size: 0.95rem;
  color: var(--color_text_soft);
  margin: 0 0 calc(var(--space_unit) * 5);
}

.contact_simple_email {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  margin: 0 auto calc(var(--space_unit) * 6);

  padding: calc(var(--space_unit) * 3.5) calc(var(--space_unit) * 7);
  border-radius: var(--radius_medium);

  font-family: var(--font_heading);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;

  color: var(--color_text_on_accent);
  text-decoration: none;

  background: linear-gradient(135deg, #22c55e, #38bdf8);
  box-shadow:
    0 18px 45px rgba(34, 197, 94, 0.35),
    inset 0 0 0 1px rgba(255, 255, 255, 0.15);

  position: relative;
  overflow: hidden;

  transition:
    transform var(--transition_slow),
    box-shadow var(--transition_slow),
    filter var(--transition_slow);
}
.contact_simple_email::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.35),
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.35)
  );
  transform: translateX(-120%);
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.contact_simple_email:hover::before,
.contact_simple_email:focus-visible::before {
  transform: translateX(120%);
}

.contact_simple_email:hover,
.contact_simple_email:focus-visible {
  transform: translateY(-3px);
  box-shadow:
    0 26px 70px rgba(34, 197, 94, 0.45),
    inset 0 0 0 1px rgba(255, 255, 255, 0.25);
  filter: saturate(1.1);
}


.contact_simple_social {
  display: flex;
  justify-content: center;
  gap: calc(var(--space_unit) * 5);
}

.contact_simple_social a {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color_text_soft);
  text-decoration: none;
  font-size: 1.1rem;
  transition: transform var(--transition_fast), color var(--transition_fast), background var(--transition_fast), border-color var(--transition_fast);
}

.contact_simple_social a:hover {
  transform: translateY(-3px);
  color: var(--color_accent);
  background: var(--color_accent_soft);
  border-color: rgba(56, 189, 248, 0.6);
}

/* Footer */
.footer {
  border-top: 1px solid var(--color_border_subtle);
  padding: calc(var(--space_unit) * 6) 0 calc(var(--space_unit) * 8);
}

.footer_inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--space_unit) * 6);
  font-size: 0.82rem;
  color: var(--color_text_muted);
}

.footer_meta {
  display: flex;
  align-items: center;
  gap: calc(var(--space_unit) * 4);
}

.footer_social {
  display: flex;
  gap: calc(var(--space_unit) * 3);
}

.footer_social_link {
  color: var(--color_text_muted);
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--transition_fast), transform var(--transition_fast);
}

.footer_social_link:hover {
  color: var(--color_accent);
  transform: translateY(-1px);
}

/* Back to top */
.back_to_top_button {
  position: fixed;
  right: calc(var(--space_unit) * 5);
  bottom: calc(var(--space_unit) * 6);
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--color_border_subtle);
  background: rgba(15, 23, 42, 0.92);
  color: var(--color_text_soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.85);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--transition_slow), transform var(--transition_slow), background var(--transition_fast), color var(--transition_fast), border-color var(--transition_fast);
  z-index: 30;
}

html[data-theme="light"] .back_to_top_button {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.12);
}

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

.back_to_top_button:hover {
  background: var(--color_accent_soft);
  color: var(--color_accent);
  border-color: rgba(56, 189, 248, 0.6);
}

/* Scroll reveal */
.scroll_reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.scroll_reveal_visible {
  opacity: 1;
  transform: translateY(0);
}

/* RTL adjustments */
html[dir="rtl"] body.body { direction: rtl; }

html[dir="rtl"] .header_nav { flex-direction: row-reverse; }
html[dir="rtl"] .header_nav_menu { flex-direction: row-reverse; }

html[dir="rtl"] .hero_section_inner,
html[dir="rtl"] .about_section_grid {
  direction: rtl;
}

html[dir="rtl"] .hero_section_content,
html[dir="rtl"] .section_header,
html[dir="rtl"] .about_section_paragraph,
html[dir="rtl"] .projects_section_card_description,
html[dir="rtl"] .faq_section_item_answer,
html[dir="rtl"] .contact_simple {
  text-align: right;
}

html[dir="rtl"] .faq_section_item_question { text-align: right; }
html[dir="rtl"] .footer_inner { flex-direction: row-reverse; }

/* Mobile navigation */
@media (max-width: 880px) {
  .header_nav_menu {
    position: fixed;
    inset: 64px 0 auto 0;
    padding: calc(var(--space_unit) * 4) calc(var(--space_unit) * 4) calc(var(--space_unit) * 5);
    background: rgba(2, 6, 23, 0.98);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.95);
    display: flex;
    flex-direction: column;
    gap: calc(var(--space_unit) * 3);
    transform: translateY(-18px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition_slow), transform var(--transition_slow);
  }

  html[data-theme="light"] .header_nav_menu {
    background: rgba(249, 250, 251, 0.98);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.14);
  }

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

  .header_nav_menu_item { padding-block: calc(var(--space_unit) * 2.5); }
  .header_nav_menu_button { display: inline-flex; }
  .header_nav_actions { gap: calc(var(--space_unit) * 2); }

  .hero_section_inner { grid-template-columns: minmax(0, 1fr); }
  .hero_section_visual { order: -1; justify-content: flex-start; margin-bottom: calc(var(--space_unit) * 6); }
  .hero_section { padding-top: calc(var(--space_unit) * 14); }

  .about_section_grid { grid-template-columns: minmax(0, 1fr); }
  .projects_section_grid { grid-template-columns: minmax(0, 1fr); }

  .footer_inner { flex-direction: column; align-items: flex-start; }
}

/* Small screens */
@media (max-width: 600px) {
  .layout_container {
    padding-left: calc(var(--space_unit) * 3);
    padding-right: calc(var(--space_unit) * 3);
  }

  .hero_section_cta_group { flex-direction: column; align-items: stretch; }
  .back_to_top_button { right: calc(var(--space_unit) * 3); bottom: calc(var(--space_unit) * 4); }
}

/* Large screens */
@media (min-width: 1280px) {
  .hero_section { padding-top: calc(var(--space_unit) * 18); padding-bottom: calc(var(--space_unit) * 22); }
  .projects_section_grid { gap: calc(var(--space_unit) * 7); }
  .about_section, .projects_section, .faq_section, .contact_section { padding-bottom: calc(var(--space_unit) * 20); }
}

/* Section scroll margins (for sticky header) */
#home, #about, #projects, #faq, #contact { scroll-margin-top: 96px; }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}