/* ==========================================================================
   CSS Переменные и Темы
   ========================================================================== */
:root {
  --bg: #0b1220;
  --bg-base: #070b14;
  --header-bg: rgba(11, 18, 32, 0.65);
  --bg-grad-1: rgba(124, 92, 255, 0.25);
  --bg-grad-2: rgba(106, 228, 255, 0.2);
  --card: rgba(255, 255, 255, 0.05);
  --card-hover: rgba(255, 255, 255, 0.08);
  --text: #eaf0ff;
  --muted: rgba(234, 240, 255, 0.72);
  --brand: #6ae4ff;
  --brand2: #7c5cff;
  --border: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(106, 228, 255, 0.35);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --radius: 20px;
  --max: 1080px;

  /* Переменные Терминала (Dark) */
  --term-bg: #0f172a;
  --term-header-bg: #1e293b;
  --c-green: #50fa7b;
  --c-blue: #8be9fd;
  --c-pink: #ff79c6;
  --c-yellow: #f1fa8c;
  --c-white: #f8f8f2;
  --c-grey: #6272a4;
}

/* Явное переключение на светлую тему через data-theme */
:root[data-theme="light"] {
  --bg: #f1f5f9;
  --bg-base: #e2e8f0;
  --header-bg: rgba(255, 255, 255, 0.82);
  --card: rgba(255, 255, 255, 0.7);
  --card-hover: rgba(255, 255, 255, 0.95);
  --text: #0f172a;
  --muted: #475569;
  --brand: #0284c7;
  --brand2: #6366f1;
  --border: rgba(15, 23, 42, 0.12);
  --border-glow: rgba(2, 132, 199, 0.25);
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.1);
  --bg-grad-1: rgba(99, 102, 241, 0.15);
  --bg-grad-2: rgba(2, 132, 199, 0.15);

  /* Переменные Терминала (Light) */
  --term-bg: #ffffff;
  --term-header-bg: #f8fafc;
  --c-green: #16a34a;
  --c-blue: #0284c7;
  --c-pink: #d946ef;
  --c-yellow: #d97706;
  --c-white: #0f172a;
  --c-grey: #64748b;
}

/* Системная светлая тема (если пользователь не выбрал dark вручную) */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f1f5f9;
    --bg-base: #e2e8f0;
    --header-bg: rgba(255, 255, 255, 0.82);
    --card: rgba(255, 255, 255, 0.7);
    --card-hover: rgba(255, 255, 255, 0.95);
    --text: #0f172a;
    --muted: #475569;
    --brand: #0284c7;
    --brand2: #6366f1;
    --border: rgba(15, 23, 42, 0.12);
    --border-glow: rgba(2, 132, 199, 0.25);
    --shadow: 0 20px 50px rgba(15, 23, 42, 0.1);
    --bg-grad-1: rgba(99, 102, 241, 0.15);
    --bg-grad-2: rgba(2, 132, 199, 0.15);

    /* Переменные Терминала (Light) */
    --term-bg: #ffffff;
    --term-header-bg: #f8fafc;
    --c-green: #16a34a;
    --c-blue: #0284c7;
    --c-pink: #d946ef;
    --c-yellow: #d97706;
    --c-white: #0f172a;
    --c-grey: #64748b;
  }
}

/* ==========================================================================
   Базовые стили и Анимация перехода темы
   ========================================================================== */
* { box-sizing: border-box; transition: 0.5s}

/* Плавный переход при смене темы для всех компонентов */
body, header, .nav, .card, .term-card, .term-header, .term-body,
.pill, .btn, .item, .service-card, .row, .lang-switcher, .phone-wrap {
  transition: background-color 0.4s ease, 
              border-color 0.4s ease, 
              color 0.4s ease, 
              box-shadow 0.4s ease;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background-color: var(--bg-base);
  background-image: 
    radial-gradient(1000px 600px at 15% 10%, var(--bg-grad-1), transparent 60%),
    radial-gradient(800px 500px at 85% 25%, var(--bg-grad-2), transparent 65%),
    linear-gradient(180deg, var(--bg-base) 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 28px 18px 60px; }

/* ==========================================================================
   Header & Навигация
   ========================================================================== */
header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; padding: 12px 18px;
  border: 1px solid var(--border);
  background: var(--header-bg);
  border-radius: 22px;
  box-shadow: var(--shadow);
  position: sticky; top: 14px; z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 { font-size: 16px; margin: 0; font-weight: 700; color: var(--text); }
.brand p { margin: 0; font-size: 12.5px; color: var(--muted); }

.avatar {
  width: 44px; height: 44px;
  width: 44px;
  height: 44px;
  aspect-ratio: 1 / 1; /* Гарантирует квадратные пропорции */
  flex-shrink: 0;       /* Запрещает flex-родителю сжимать блок по ширине */
  border-radius: 12px;
  border: 1px solid var(--border-glow);
  display: grid; place-items: center;
  font-weight: 800; font-size: 16px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; align-items: center; }
.nav a {
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 13.5px; font-weight: 500;
  transition: all 0.25s ease;
}
.nav a:hover { border-color: var(--border); background: var(--card-hover); color: var(--text); }

/* Hamburger Menu */
.hamburger {
  display: none; flex-direction: column; gap: 6px;
  background: transparent; border: none; cursor: pointer; padding: 10px; border-radius: 8px;
  margin-right: -4px;
}
.hamburger span {
  width: 26px; height: 2px; background-color: var(--text); border-radius: 2px; 
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@media (max-width: 768px) {
  /* Форматирование кнопки темы внутри мобильного меню */
  .theme-btn {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
  }

  /* Отображение текста кнопки только на мобильных */
  .theme-btn::after {
    content: "Тёмная тема / Dark theme";
  }

  [data-theme="light"] .theme-btn::after {
    content: "Светлая тема / Light theme";
  }  
  .hamburger { display: flex; z-index: 101; }
  .nav {
    background: rgba(255, 255, 255, 0.90);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: var(--header-bg);
    position: fixed; top: 80px; left: 50%;
    transform: translateX(-50%) translateY(-10px) scale(0.95);
    width: min(340px, calc(100vw - 32px));
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    flex-direction: column; align-items: stretch;
    padding: 20px; gap: 8px;
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: all 0.3s cubic-bezier(0.34, 1.3, 0.64, 1);
  }
  .nav.active {
    opacity: 1; visibility: visible; pointer-events: auto;
    transform: translateX(-50%) translateY(0) scale(1);
  }
  .nav a { text-align: center; font-size: 15px; padding: 12px; background: var(--card); }
  .lang-switcher { margin-left: 0; margin-top: 6px; justify-content: center; width: 100%; }
  
  .hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .hamburger.active span:nth-child(2) { opacity: 0; transform: scale(0); }
  .hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}

/* Language & Theme Switchers */
.lang-switcher {
  display: flex; align-items: center; gap: 3px;
  background: var(--card); padding: 3px;
  border-radius: 12px; border: 1px solid var(--border); margin-left: 6px;
}
.lang-btn {
  background: transparent; border: none; color: var(--muted);
  padding: 5px 10px; font-size: 12px; font-weight: 700;
  border-radius: 8px; cursor: pointer; transition: all 0.2s;
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active {
  background: var(--card-hover); color: var(--brand);
  border: 1px solid var(--border-glow);
}

.theme-btn {
  background: transparent; border: none; color: var(--muted);
  padding: 5px 8px; border-radius: 8px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease;
}
.theme-btn:hover { color: var(--brand); background: var(--card-hover); }
.theme-btn .icon-sun { display: none; }
.theme-btn .icon-moon { display: block; }

[data-theme="light"] .theme-btn .icon-sun { display: block; color: #f59e0b; }
[data-theme="light"] .theme-btn .icon-moon { display: none; }
:root[data-theme="dark"] .nav {
  background: rgba(11, 18, 32, 0.90);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 18px;
  align-items: stretch; margin-top: 20px;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}
.card:hover { border-color: var(--brand); }

.hero h2 { margin: 0 0 12px; font-size: 36px; letter-spacing: -0.02em; line-height: 1.2; color: var(--text); }
.grad {
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { margin: 0; color: var(--muted); font-size: 15.5px; }

.status-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 99px;
  background: rgba(106, 228, 255, 0.08); border: 1px solid var(--border-glow);
  font-size: 12.5px; color: var(--brand); margin-bottom: 16px; font-weight: 500;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--brand);
  box-shadow: 0 0 10px var(--brand); animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(106, 228, 255, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(106, 228, 255, 0); }
}

.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card); color: var(--text);
  font-weight: 600; font-size: 14px; transition: all 0.25s ease;
}
.btn:hover { transform: translateY(-2px); background: var(--card-hover); border-color: var(--border-glow); }
.btn.primary {
  border-color: var(--border-glow);
  background: linear-gradient(135deg, rgba(106, 228, 255, 0.2), rgba(124, 92, 255, 0.2));
  box-shadow: 0 4px 20px rgba(106, 228, 255, 0.15);
}
.btn.primary:hover {
  box-shadow: 0 6px 25px rgba(106, 228, 255, 0.3);
  border-color: var(--brand);
}

.meta { display: grid; gap: 12px; grid-template-columns: 1fr; }
.pill {
  padding: 14px 16px; border-radius: 16px;
  border: 1px solid var(--border); background: var(--card);
  display: flex; align-items: center; gap: 14px;
}
.pill:hover { background: var(--card-hover); border-color: var(--brand); }
.ico {
  width: 38px; height: 38px; border-radius: 12px;
  background: rgba(106, 228, 255, 0.08); border: 1px solid var(--border-glow);
  display: grid; place-items: center; color: var(--brand); flex: 0 0 auto;
}
.pill b { display: block; margin: 0 0 2px; font-size: 13.5px; color: var(--text); }
.pill span { color: var(--muted); font-size: 13px; }

/* ==========================================================================
   Terminal Features Section
   ========================================================================== */
.features-section { display: flex; flex-direction: column; gap: 70px; margin: 60px 0; }
.feature-row { display: flex; align-items: center; gap: 40px; }
.feature-row:nth-child(even) { flex-direction: row-reverse; }
.feature-text { flex: 1; }

.feature-title {
  font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 16px;
  padding-left: 16px; border-left: 3px solid var(--brand); line-height: 1.2;
}
.feature-row:nth-child(even) .feature-title { border-color: var(--brand2); }
.feature-desc { color: var(--muted); font-size: 15.5px; line-height: 1.7; }
.feature-visual { flex: 1.2; perspective: 1200px; }

.term-card {
  background: var(--term-bg);
  border: 1px solid var(--border);
  border-radius: 12px; padding: 0;
  box-shadow: var(--shadow); position: relative; overflow: hidden;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.6s ease;
}
.term-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.01) 30%, transparent 50%);
  pointer-events: none;
}

.feature-row:nth-child(odd) .term-card {
  transform: rotateY(-12deg) rotateX(4deg) rotateZ(1deg);
  box-shadow: 25px 25px 50px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.feature-row:nth-child(even) .term-card {
  transform: rotateY(12deg) rotateX(4deg) rotateZ(-1deg);
  box-shadow: -25px 25px 50px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.feature-row .term-card:hover {
  transform: rotateY(0deg) rotateX(0deg) rotateZ(0deg) translateY(-5px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4); border-color: var(--brand);
}

.term-header {
  background: var(--term-header-bg);
  padding: 10px 16px; display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--border);
}
.term-header .dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f56; }
.dot.yel { background: #ffbd2e; }
.dot.grn { background: #27c93f; }

.term-body {
  padding: 16px;
  font-family: 'Fira Code', Consolas, 'Courier New', monospace;
  font-size: 13.5px; line-height: 1.5; overflow-x: auto;
}
.term-body pre { margin: 0; font-family: inherit; }

/* Подсветка синтаксиса через CSS переменные */
.c-green  { color: var(--c-green); }
.c-blue   { color: var(--c-blue); }
.c-pink   { color: var(--c-pink); }
.c-yellow { color: var(--c-yellow); }
.c-white  { color: var(--c-white); }
.c-grey   { color: var(--c-grey); }

@media (max-width: 900px) {
  .features-section { gap: 40px; margin: 40px 0; }
  .feature-row, .feature-row:nth-child(even) { flex-direction: column-reverse; gap: 24px; }
  .feature-visual { perspective: none; width: 100%; }
  .feature-row:nth-child(odd) .term-card,
  .feature-row:nth-child(even) .term-card { 
    transform: none; box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  }
  .term-body { font-size: 10.5px; padding: 10px 12px; }
}

/* ==========================================================================
   3D Устройства (Ноутбук и Смартфон)
   ========================================================================== */
.device-scene { perspective: 2000px; margin-top: 50px; position: relative; }

/* Laptop */
.laptop-wrap {
  position: relative; max-width: 900px; margin: 0 auto;
  transform-style: preserve-3d; transform: rotateX(8deg);
}
.laptop-lid {
  width: 100%; aspect-ratio: 16 / 10; position: relative;
  transform-style: preserve-3d; transform-origin: bottom center;
  transform: rotateX(-95deg); z-index: 2; will-change: transform;
}
.laptop-screen, .laptop-lid-back {
  position: absolute; inset: 0; border-radius: 16px 16px 0 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.laptop-screen {
  background: var(--bg);
  border: 12px solid #000; border-bottom-width: 24px;
  display: flex; flex-direction: column; overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
}
.device-content { flex: 1; background: var(--bg); padding: 24px; overflow-y: auto; }
.device-content::-webkit-scrollbar { width: 6px; }
.device-content::-webkit-scrollbar-thumb { background: var(--brand); border-radius: 4px; }

.laptop-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
.laptop-grid .item { padding: 14px; background: var(--card); border: 1px solid var(--border); }
.laptop-bezel-bottom {
  position: absolute; bottom: -20px; left: 0; right: 0;
  text-align: center; font-size: 10px; color: #444;
  letter-spacing: 2px; font-weight: 600; pointer-events: none;
}
.laptop-lid-back {
  background: linear-gradient(to bottom, #4a4f56, #2d3136);
  transform: rotateY(180deg); border: 2px solid #555; border-bottom: none;
  display: flex; align-items: center; justify-content: center;
}
.mb-logo {
  font-size: 60px; font-weight: 900; color: rgba(0, 0, 0, 0.4);
  text-shadow: 0 1px 0 rgba(255,255,255,0.1); letter-spacing: -4px;
}
.laptop-base {
  width: 100%; height: 16px;
  background: linear-gradient(to right, #666, #999, #666);
  border-radius: 0 0 20px 20px; position: relative; z-index: 1;
  box-shadow: 0 30px 50px rgba(0,0,0,0.6), inset 0 2px 2px rgba(255,255,255,0.4);
}
.laptop-notch {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 120px; height: 6px; background: #444; border-radius: 0 0 6px 6px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.6);
}

/* Smartphone */
.phone-wrap {
  max-width: 380px; margin: 0 auto; background: #1e293b;
  border: 10px solid #111; border-radius: 40px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.7), inset 0 0 15px rgba(255,255,255,0.05);
  position: relative; overflow: hidden;
}
.phone-speaker {
  width: 70px; height: 16px; background: #000; position: absolute;
  top: 8px; left: 50%; transform: translateX(-50%); border-radius: 10px; z-index: 10;
}
.phone-screen {
  background: var(--bg); max-height: 600px; height: auto; min-height: 520px;
  padding: 35px 12px 20px 12px; overflow-y: auto;
}
.phone-screen::-webkit-scrollbar { width: 4px; }
.phone-screen::-webkit-scrollbar-thumb { background: var(--brand); border-radius: 4px; }
.phone-grid { grid-template-columns: 1fr; gap: 10px; }
.phone-grid .item { padding: 12px; background: var(--card); }

/* ==========================================================================
   Секции, Сетка и Компоненты
   ========================================================================== */
section { margin-top: 24px; }
.section-title {
  font-size: 18px; font-weight: 700; margin: 0 0 14px;
  color: var(--text); display: flex; align-items: center; gap: 8px;
}

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }

.item {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 16px; padding: 18px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.item:hover { background: var(--card-hover); border-color: var(--brand); transform: translateY(-3px); }
.item-header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.item h3 { margin: 0; font-size: 15px; font-weight: 600; color: var(--text); }
.item p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* Services Grid */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 900px) { .services-grid { grid-template-columns: 1fr; } }

.service-card {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 18px; padding: 20px; position: relative; overflow: hidden;
  transition: 0.4s;
}
.service-card:hover { border-color: var(--brand); background: var(--card-hover); transform: translateY(-4px); }
.service-icon {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(106,228,255,0.15), rgba(124,92,255,0.15));
  border: 1px solid var(--border-glow); display: grid; place-items: center;
  color: var(--brand); margin-bottom: 14px;
}
.service-card h3 { margin: 0 0 8px; font-size: 16px; font-weight: 700; color: var(--text); }
.service-card p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* Work Rows & Cards */
#work .grid .row { display: flex; flex-direction: column; gap: 8px; }
#work .grid .row:hover { border-color: var(--brand); box-shadow: var(--shadow); }

.row-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.row-top h3 { margin: 0; font-size: 18px; line-height: 1.3; flex: 1; color: var(--text); }
.row-badge { white-space: nowrap; padding: 4px 12px; font-size: 12px; border-radius: 20px; }

.row {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 16px 18px; border-radius: 16px;
  border: 1px solid var(--border); background: var(--card);
}
.row:hover { background: var(--card-hover); border-color: var(--brand); }
.row b { font-size: 15px; color: var(--text); }
.row span { color: var(--muted); font-size: 13.5px; display: block; margin-top: 4px; }

.tag {
  font-size: 12px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--brand); white-space: nowrap;
  background: rgba(106, 228, 255, 0.06); align-self: flex-start; font-weight: 500;
}

/* Footer */
footer {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border);
  color: var(--muted); text-align: center; font-size: 13.5px;
}


/* Плавность изменения параметров */
[data-i18n] {
  transition: filter 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: filter, opacity, transform;
}

/* Состояние в момент смены языка */
.i18n-animating {
  opacity: 0.2;
  filter: blur(6px);
  transform: translateY(-2px) scale(0.98);
}