:root {
  --primary: #00d4ff;
  --dark: #0a1a2f;
  --darker: #050d1a;
  --accent: #0077cc;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--dark);
  color: #e0f0ff;
  font-family: "Segoe UI", system-ui, sans-serif;
  overflow-x: hidden;
}

.bg-darker {
  background-color: var(--darker);
}

/* Navbar */
.navbar {
  background: rgba(10, 26, 47, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link {
  color: #e0f0ff !important;
  transition: all 0.3s ease;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary) !important;
}

/* Hero */
.hero {
  min-height: 100vh;
  background: radial-gradient(
    circle at center,
    rgba(0, 212, 255, 0.05) 0%,
    var(--dark) 70%
  );
  display: flex;
  align-items: center;
}

.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 4px solid rgba(0, 212, 255, 0.3);
  object-fit: cover;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: border-color 0.3s ease;
}

.hero-photo:hover {
  border-color: var(--primary);
}

.hero-subtitle {
  color: var(--primary);
  font-weight: 500;
}

/* Button Custom */
.custom-btn {
  border-radius: 30px;
  font-weight: 600;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
  transition: all 0.3s ease;
}

.custom-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

/* Section */
.section {
  padding: 100px 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
  position: relative;
  padding-bottom: 15px;
}

.section-title:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
}

.about-text {
  font-size: 14px;
}

@media (min-width: 768px) {
  .about-text {
    font-size: 1.25rem;
  }
}

.project-card,
.cert-card,
.skill-card,
.edu-card {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
  overflow: hidden;
}

/* Project logo */
.project-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.project-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hard-skill-card {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.04),
    rgba(255, 255, 255, 0.02)
  );
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: all 0.3s ease;
  overflow: hidden;
}

.hard-skill-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.org-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.3s ease;
}

.org-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.35);
  background: rgba(255, 255, 255, 0.05);
}

.org-icon-wrap {
  min-width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.08);
  border-radius: 10px;
  border: 1px solid rgba(0, 212, 255, 0.15);
}

.project-card:hover,
.cert-card:hover,
.skill-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.edu-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.25);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.cert-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tool-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  color: #e0f0ff;
  padding: 12px 15px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.tool-badge i {
  font-size: 1.2rem;
  color: var(--primary);
  text-align: center;
  word-break: break-word;
}

.tool-badge:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}

/* Footer */
.contact-link {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.contact-link:hover {
  color: rgba(255, 255, 255, 0.95);
}

.social-btn {
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  transition:
    background 0.2s,
    border-color 0.2s,
    color 0.2s;
}

.social-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.95);
}

.cert-card {
  cursor: pointer;
}

.reveal-section {
  opacity: 0;
  transform-style: preserve-3d;
  perspective: 1200px;
}

.btn-outline-info.custom-btn {
  color: #0dcaf0;
  border-color: #0dcaf0;
}

.btn-outline-info.custom-btn:hover {
  color: #fff;
  background-color: #0dcaf0;
}

/* =========================================
   LANGUAGE TOGGLE BUTTON
========================================= */
.lang-toggle-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 9999;
  background-color: var(--primary);
  color: var(--dark);
  border: none;
  border-radius: 50px;
  padding: 12px 20px;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-toggle-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.6);
  background-color: #fff;
}

#shareBtn {
  border-radius: 20px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}

#shareBtn:hover {
  background-color: var(--primary);
  color: var(--dark);
  box-shadow: 0 0 15px var(--primary);
}

/* =========================================
   MOBILE RESPONSIVENESS
========================================= */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-top: 130px;
    padding-bottom: 50px;
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 2rem !important;
  }

  .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.2);
  }

  .navbar-toggler:focus {
    box-shadow: none;
  }

  .navbar-collapse {
    background: var(--dark);
    padding: 15px;
    border-radius: 10px;
    margin-top: 10px;
    border: 1px solid rgba(255, 255, 255, 0.05);
  }

  .lang-toggle-btn {
    bottom: 20px;
    right: 20px;
    padding: 10px 15px;
    font-size: 0.9rem;
  }
}