/* ============================================================
   CUSTOM PROPERTIES
   ============================================================ */
:root {
  --bg-primary:     #1a1a2e;
  --bg-secondary:   #16213e;
  --bg-card:        #0f3460;
  --accent:         #00b4d8;
  --accent-hover:   #0096c7;
  --accent-glow:    rgba(0, 180, 216, 0.15);
  --accent-glow-lg: rgba(0, 180, 216, 0.25);
  --text-primary:   #ffffff;
  --text-secondary: #cad3dc;
  --text-muted:     #7a8899;
  --border:         rgba(0, 180, 216, 0.2);
  --border-hover:   rgba(0, 180, 216, 0.5);
  --font-heading:   'Space Grotesk', sans-serif;
  --font-body:      'Inter', sans-serif;
  --nav-height:     68px;
  --radius:         10px;
  --transition:     0.2s ease;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.5rem); font-weight: 700; }
h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 2.5rem;
}
h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.5rem; }
h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 1rem; }

p { color: var(--text-secondary); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

ul { list-style: none; }

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

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 2rem;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.nav__logo:hover { color: var(--accent-hover); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}
.nav__links a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.lang-toggle {
  background: none;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  padding: 0.3rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: background var(--transition), color var(--transition);
}
.lang-toggle:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 3rem) 2rem 4rem;
  position: relative;
  background:
    radial-gradient(ellipse 80% 60% at 65% 40%, rgba(0, 180, 216, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(15, 52, 96, 0.4) 0%, transparent 50%),
    var(--bg-primary);
}

.hero__content {
  display: flex;
  align-items: center;
  gap: 4rem;
  max-width: 1100px;
  width: 100%;
}

/* Photo */
.hero__photo-wrap {
  flex-shrink: 0;
}

.hero__photo {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 0 50px var(--accent-glow-lg);
}

.hero__photo-placeholder {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  box-shadow: 0 0 50px var(--accent-glow-lg);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  user-select: none;
}

/* Text */
.hero__text {
  flex: 1;
}

.hero__subtitle {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero__tagline {
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero__tagline em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}

.hero__body {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 2rem;
}

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

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.4rem;
  color: var(--accent);
  opacity: 0.6;
  animation: bounce 2.4s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.6rem;
  border-radius: 7px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background var(--transition);
  border: none;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(0, 180, 216, 0.3);
}
.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--bg-primary);
  box-shadow: 0 6px 30px rgba(0, 180, 216, 0.5);
}

.btn--secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn--secondary:hover {
  background: var(--accent-glow);
  color: var(--accent);
}

/* ============================================================
   SCROLL ANIMATION BASE
   ============================================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}