/* =====================
   DARK THEME VARIABLES (ONLY)
===================== */
:root {
  --bg-main: #0b0b0b;
  --text-main: #f5f5f5;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
}

/* =====================
   BASE RESET
===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
}

/* =====================
   BACKGROUND (IMAGE)
===================== */
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(
      rgba(0, 0, 0, 0.75),
      rgba(0, 0, 0, 0.75)
    ),
    url("image/cssback.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* =====================
   LINKS
===================== */
a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  opacity: 0.85;
}

/* =====================
   NAVBAR
===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.3s ease;
}

.site-header.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
}

.site-header.hide {
  transform: translateY(-100%);
}

.nav {
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  letter-spacing: 2px;
}

.nav-links {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-links a {
  margin-left: 20px;
  font-size: 13.5px;
  opacity: 0.6;
  padding: 6px 0;
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
  font-weight: 600;
}

.nav-indicator {
  position: absolute;
  bottom: -6px;
  height: 2px;
  width: 0;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease, width 0.3s ease;
}

/* =====================
   HERO
===================== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-glass {
  padding: 45px;
  text-align: center;
  border-radius: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(18px);
}

.profile-pic {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 20px;
}

/* =====================
   BUTTONS
===================== */
.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.btn {
  padding: 10px 22px;
  border-radius: 20px;
  background: #fff;
  color: #000;
}

.btn.outline {
  background: transparent;
  border: 1px solid currentColor;
  color: inherit;
}

.btn:active {
  transform: scale(0.96);
}

/* =====================
   SECTIONS
===================== */
.section {
  padding: 90px 15%;
}

/* =====================
   SKILLS
===================== */
.skills-advanced {
  max-width: 900px;
  display: grid;
  gap: 30px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-list span {
  padding: 8px 14px;
  font-size: 13px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

/* =====================
   JOURNEY
===================== */
.journey-advanced {
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.journey-step {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
}

.journey-content {
  padding-left: 20px;
  border-left: 2px solid var(--glass-border);
}

/* =====================
   PROJECTS
===================== */
.projects-advanced {
  max-width: 900px;
  display: grid;
  gap: 30px;
}

.project-advanced {
  padding: 28px;
  border-radius: 22px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-advanced:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}

/* =====================
   CONTACT
===================== */
.contact-cards {
  max-width: 700px;
  display: grid;
  gap: 16px;
}

.contact-card {
  padding: 18px 22px;
  border-radius: 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

/* =====================
   FOOTER
===================== */
footer {
  text-align: center;
  padding: 40px;
  opacity: 0.6;
}

/* =====================
   ANIMATION
===================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.show {
  opacity: 1;
  transform: translateY(0);
}

/* =====================
   STUDY PAGE
===================== */
.study-intro {
  max-width: 600px;
  font-size: 14.5px;
  opacity: 0.85;
  margin-bottom: 30px;
}

.study-list {
  max-width: 700px;
  padding-left: 20px;
}

.study-list li {
  font-size: 14.5px;
  margin-bottom: 10px;
  opacity: 0.9;
}

/* =====================
   ROADMAP
===================== */
.roadmap {
  max-width: 800px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.roadmap-item {
  padding: 10px 18px;
  font-size: 14px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  cursor: pointer;
}

.roadmap-item.active {
  font-weight: 600;
  border-color: currentColor;
}

/* =====================
   QUICK STUDY ACCESS
===================== */
.study-search {
  max-width: 400px;
  margin-bottom: 26px;
}

.study-search input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: inherit;
}

.quick-links {
  max-width: 900px;
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.quick-card {
  padding: 22px;
  border-radius: 22px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.quick-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}

/* =====================
   MOBILE
===================== */
@media (prefers-reduced-motion: reduce) {
  .bg {
    animation: none;
  }
}

  .hero {
    padding: 120px 16px 80px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .section {
    padding: 70px 18px;
  }

  .journey-step {
    grid-template-columns: 1fr;
  }

/* =====================
   BACKGROUND SLOW ANIMATION
===================== */

.bg {
  animation: bgZoom 40s ease-in-out infinite;
  will-change: transform;
}

@keyframes bgZoom {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

/* =====================
   CONTACT – IMPROVED
===================== */

.contact-intro {
  max-width: 620px;
  font-size: 14.5px;
  opacity: 0.85;
  margin-bottom: 34px;
}

.contact-cards {
  max-width: 720px;
  display: grid;
  gap: 18px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 24px;
  border-radius: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(0,0,0,0.6);
}

.contact-icon {
  font-size: 20px;
  opacity: 0.9;
}

.contact-label {
  display: block;
  font-size: 12px;
  opacity: 0.6;
  margin-bottom: 2px;
}

.contact-value {
  font-size: 14.5px;
  font-weight: 500;
}

.contact-note {
  margin-top: 24px;
  font-size: 13px;
  opacity: 0.6;
}
/* =====================
   CONTACT CTA
===================== */

.contact-cta {
  margin-top: 30px;
}

.contact-cta .btn {
  padding: 12px 26px;
  font-size: 14.5px;
}