/* ============================================
   GENERAL DOCUMENT SETTINGS
   ============================================ */

/* Global reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  color: inherit;
}

/* Body defaults */
body {
  background: #fff;
  color: #000;
  line-height: 1.6;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Base font sizing */
p {
  font-size: 18px;
}

span {
  font-size: 18px;
}

/* Lists */
ul {
  list-style-position: outside;
  padding-left: 1.5rem;
  margin-top: 0.5rem;
}

/* Screen-reader only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   CSS VARIABLES
   ============================================ */

:root {
  /* Hover animation */
  --text-hover-translate: -3px;
  --text-hover-scale: 1.01;
  --text-hover-duration: 180ms;
  --text-hover-easing: ease;
  --text-hover-shadow: 0 6px 14px rgba(0,0,0,0.10);
  --text-hover-letter-spacing: 0.2px;
  
  /* 3D text effect */
  --float-extrude-1: rgba(0,0,0,0.15);
  --float-extrude-2: rgba(0,0,0,0.12);
  --float-extrude-3: rgba(0,0,0,0.09);
  --float-extrude-4: rgba(0,0,0,0.06);
  --float-ambient: rgba(0,0,0,0.28);
  --float-highlight: rgba(255,255,255,0.8);
  --float-shadow-offset: 12px;
  --float-shadow-blur: 28px;
  
  /* Section transitions */
  --section-transition-duration: 820ms;
  --section-transition-easing: cubic-bezier(0.22, 1, 0.36, 1);
  --section-transition-overlay: rgba(0,0,0,0.08);
  --section-stagger-step: 120ms;
}

/* ============================================
   HOVER & ANIMATION EFFECTS
   ============================================ */

/* Headings-only hover */
h1, h2, h3, h4, h5, h6 {
  transition: transform var(--text-hover-duration) var(--text-hover-easing),
              text-shadow var(--text-hover-duration) var(--text-hover-easing),
              letter-spacing var(--text-hover-duration) var(--text-hover-easing);
  will-change: transform, text-shadow;
}

h1:hover, h2:hover, h3:hover, h4:hover, h5:hover, h6:hover {
  transform: translateY(var(--text-hover-translate)) scale(var(--text-hover-scale));
  text-shadow: var(--text-hover-shadow);
  letter-spacing: var(--text-hover-letter-spacing);
}

/* Opt-out class */
.no-hover, .no-hover * {
  transition: none !important;
  transform: none !important;
  text-shadow: none !important;
  letter-spacing: normal !important;
  animation: none !important;
}

/* ============================================
   3D TEXT EFFECTS
   ============================================ */

/* Strong 3D for primary headings */
h1, h2 {
  text-shadow:
    0 1px 0 var(--float-highlight),
    1px 1px 0 var(--float-extrude-1),
    2px 2px 0 var(--float-extrude-1),
    3px 3px 0 var(--float-extrude-2),
    4px 4px 0 var(--float-extrude-3),
    5px 5px 0 var(--float-extrude-4),
    0 var(--float-shadow-offset) var(--float-shadow-blur) var(--float-ambient);
  transform: translateZ(0);
  filter: drop-shadow(0 var(--float-shadow-offset) var(--float-shadow-blur) var(--float-ambient));
}

/* Subtle 3D for smaller headings */
h3, h4, h5, h6 {
  text-shadow:
    0 1px 0 var(--float-highlight),
    1px 1px 0 rgba(0,0,0,0.06),
    0 6px 14px rgba(0,0,0,0.12);
  transform: translateZ(0);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.12));
}

/* Subtle 3D for body text */
p, li, a, .date {
  text-shadow:
    0 1px 0 var(--float-highlight),
    1px 1px 0 rgba(0,0,0,0.06),
    0 6px 14px rgba(0,0,0,0.12);
  transform: translateZ(0);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.12));
}

/* ============================================
   SECTION REVEAL ANIMATION
   ============================================ */

.section-reveal {
  opacity: 0;
  transform: translateY(40px) scale(0.995);
  transition: opacity calc(var(--section-transition-duration)/1.05) var(--section-transition-easing),
              transform calc(var(--section-transition-duration)/1.05) var(--section-transition-easing);
  will-change: opacity, transform;
}

.section-reveal.in-view {
  opacity: 1;
  transform: none;
}

.section-reveal > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--section-transition-duration) var(--section-transition-easing),
              transform var(--section-transition-duration) var(--section-transition-easing);
  will-change: opacity, transform;
}

.section-reveal.in-view > * {
  opacity: 1;
  transform: none;
}

/* Transition overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--section-transition-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--section-transition-duration) var(--section-transition-easing);
  z-index: 999;
}

body.is-transitioning::before {
  opacity: 1;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .section-reveal,
  .section-reveal.in-view,
  .section-reveal > *,
  .section-reveal.in-view > *,
  body::before,
  body.is-transitioning::before {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

/* ============================================
   NAVIGATION
   ============================================ */

.main-nav {
  position: fixed;
  top: 18px;
  right: 24px;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(6px);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 12000;
  display: flex;
  gap: 6px;
  align-items: center;
  transition: background 220ms ease, color 220ms ease;
  color: #ffb366;
}

.main-nav .nav-link {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 6px 8px;
  border-radius: 6px;
  display: inline-block;
  transition: background 180ms ease, color 180ms ease;
  text-shadow:
    0 1px 0 rgba(255,255,255,0.15),
    1px 1px 0 rgba(255,255,255,0.08),
    0 6px 14px rgba(0,0,0,0.3);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.3));
}

.main-nav .nav-link:hover {
  background: rgba(255,179,102,0.08);
}

.main-nav .nav-link.active {
  background: rgba(255,179,102,0.16);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-right: 6px;
  border: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle:hover {
  background: rgba(255,179,102,0.08);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Language selector dropdown */
.language-selector {
  display: flex;
  align-items: center;
  margin-right: 8px;
  padding-right: 8px;
  border-right: 1px solid rgba(255, 179, 102, 0.3);
}

.language-selector select {
  background: transparent;
  color: #ffb366;
  border: 1px solid rgba(255, 179, 102, 0.3);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 220ms ease, border-color 220ms ease;
  text-shadow:
    0 1px 0 rgba(255,255,255,0.15),
    1px 1px 0 rgba(255,255,255,0.08),
    0 6px 14px rgba(0,0,0,0.3);
  outline: none;
  min-width: 52px;
  text-align: center;
}

.language-selector select:hover {
  background: rgba(255,179,102,0.12);
  border-color: rgba(255, 179, 102, 0.5);
}

.language-selector select:focus {
  border-color: #ffb366;
  box-shadow: 0 0 0 2px rgba(255, 179, 102, 0.2);
}

.language-selector select option {
  background: #1a1a1a;
  color: #ffb366;
  padding: 6px;
  font-size: 13px;
  font-weight: 600;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  height: 750px;
  width: 100%;
  background: url("../img/main_img.png") center/cover no-repeat;
  display: flex;
  align-items: flex-start;
  padding-left: 60px;
  color: #fff;
}

.hero-content {
  padding-right: 10vw;
  padding-top: 15px;
  margin-top: 100px;
}

.hero-content h1 {
  font-size: 64px;
  font-weight: 600;
  margin-bottom: 100px;
  color: #ffb366;
  text-shadow:
    0 1px 0 rgba(255,200,100,0.4),
    1px 1px 0 rgba(255,179,102,0.25),
    2px 2px 0 rgba(255,179,102,0.18),
    3px 3px 0 rgba(255,179,102,0.12),
    4px 4px 0 rgba(0,0,0,0.15),
    0 var(--float-shadow-offset) var(--float-shadow-blur) rgba(0,0,0,0.55);
  filter: drop-shadow(0 var(--float-shadow-offset) var(--float-shadow-blur) rgba(0,0,0,0.55));
}

.hero-content p {
  font-size: 18px;
  color: #ffb366;
  margin-bottom: 20px;
  text-align: justify;
  text-shadow:
    0 1px 0 rgba(255,200,100,0.2),
    1px 1px 0 rgba(0,0,0,0.06),
    0 6px 14px rgba(0,0,0,0.15);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.15));
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-general {
  display: flex;
  gap: 80px;
  padding: 100px 60px;
}

.profile-img {
  width: 30%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-img figure {
  margin-bottom: 20px;
}

.profile-img img {
  width: 100%;
  max-width: 380px;
  height: auto;
  object-fit: cover;
  display: block;
}

.profile-text {
  justify-content: center;
  align-items: center;
}

.profile-text h2 {
  font-size: 42px;
  font-weight: 600;
  margin-bottom: 30px;
}

.profile-text p {
  max-width: 800px;
  font-size: 18px;
  color: #333;
  text-align: justify;
  margin-bottom: 20px;
}

.profile-text li {
  max-width: 800px;
  font-size: 16px;
  color: #333;
  text-align: justify;
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.contents {
  padding: 100px 60px;
}

.contents.dark {
  background: #131313;
  color: #ffb366;
}

.contents.light {
  background: #fff;
  color: #000;
}

.contents h2 {
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 40px;
}

/* Dark section text effects */
.contents.dark h1,
.contents.dark h2 {
  text-shadow:
    0 1px 0 rgba(255,255,255,0.3),
    1px 1px 0 rgba(255,255,255,0.2),
    2px 2px 0 rgba(255,255,255,0.14),
    3px 3px 0 rgba(255,255,255,0.08),
    4px 4px 0 rgba(0,0,0,0.1),
    0 var(--float-shadow-offset) var(--float-shadow-blur) rgba(0,0,0,0.5);
  filter: drop-shadow(0 var(--float-shadow-offset) var(--float-shadow-blur) rgba(0,0,0,0.5));
}

.contents.dark h3 {
  text-shadow:
    0 1px 0 rgba(255,255,255,0.15),
    1px 1px 0 rgba(255,255,255,0.08),
    0 6px 14px rgba(0,0,0,0.3);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.3));
}

.contents.dark p,
.contents.dark li,
.contents.dark a {
  text-shadow:
    0 1px 0 rgba(255,255,255,0.15),
    1px 1px 0 rgba(255,255,255,0.08),
    0 6px 14px rgba(0,0,0,0.3);
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.3));
}

/* Content blocks */
.content-item {
  margin-bottom: 40px;
  text-align: justify;
}

.content-item .date {
  font-size: 14px;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: 10px;
}

.content-item h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.content-item p {
  font-size: 18px;
  line-height: 1.4;
  color: inherit;
  margin-bottom: 20px;
}

/* Contact section paragraph spacing */
#contact .content-item p {
  margin-bottom: 20px;
}

/* External link icon */
.external-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  margin-left: 8px;
  vertical-align: middle;
  color: inherit;
  text-decoration: none;
}

.external-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ============================================
   RESPONSIVE: TABLET
   ============================================ */

@media (max-width: 768px) {
  /* Hero */
  .hero {
    min-height: 600px;
    height: auto;
    width: 100%;
    padding-left: 20px;
    padding-right: 20px;
    padding-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .hero-content {
    margin-top: 0;
  }
  
  .hero-content h1 {
    font-size: 36px;
    margin-bottom: 8px;
  }
  
  .hero-content p {
    font-size: 14px;
    margin-bottom: 8px;
  }

  /* Base fonts */
  p {
    font-size: 14px;
  }
  
  span {
    font-size: 14px;
  }

  /* About */
  .about-general {
    flex-direction: column;
    gap: 40px;
    padding: 50px 20px;
  }
  
  .profile-img {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .profile-img img {
    width: 100%;
    max-width: 300px;
    height: auto;
  }
  
  .profile-img figure {
    margin-bottom: 15px;
    width: 100%;
  }
  
  .profile-text {
    width: 100%;
  }
  
  .profile-text h2 {
    font-size: 28px;
    margin-bottom: 20px;
  }
  
  .profile-text p {
    max-width: 100%;
    font-size: 14px;
  }

  /* Content sections */
  .contents {
    padding: 50px 20px;
  }
  
  .contents h2 {
    font-size: 24px;
    margin-bottom: 30px;
  }
  
  .content-item {
    margin-bottom: 30px;
    max-width: 100%;
  }
  
  .content-item .date {
    font-size: 12px;
    margin-bottom: 8px;
  }
  
  .content-item h3 {
    font-size: 18px;
    margin-bottom: 6px;
  }
  
  .content-item p {
    font-size: 14px;
  }

  /* Reduce 3D effect intensity */
  h1, h2, h3, h4, h5, h6 {
    --float-shadow-offset: 6px;
    --float-shadow-blur: 14px;
  }
  
  .hero-content h1 {
    --float-shadow-offset: 6px;
    --float-shadow-blur: 14px;
  }

  /* Disable scroll animations on small screens */
  .section-reveal,
  .section-reveal.in-view,
  .section-reveal > *,
  .section-reveal.in-view > * {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
  
  body::before,
  body.is-transitioning::before {
    transition: none !important;
    opacity: 0 !important;
  }
}

/* ============================================
   RESPONSIVE: MOBILE (≤720px)
   ============================================ */

@media (max-width: 720px) {
  .main-nav {
    right: 12px;
    top: 12px;
    padding: 6px 8px;
    gap: 4px;
  }
  
  .main-nav .nav-link {
    font-size: 13px;
    padding: 4px 6px;
  }

  /* Mobile dropdown */
  .nav-toggle {
    display: inline-flex;
    width: 30px;
    height: 30px;
    margin-right: 4px;
  }
  
  .nav-toggle-line {
    width: 16px;
  }
  
  .nav-links {
    display: none;
    position: fixed;
    top: 56px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 8px;
    background: #131313;
    backdrop-filter: blur(8px);
    border-radius: 10px;
    z-index: 11001;
  }
  
  .main-nav.open .nav-links {
    display: flex;
  }
  
  .main-nav .nav-link {
    font-size: 14px;
    padding: 8px;
  }
  
  /* Mobile language selector as first item */
  .language-selector {
    margin-right: 0;
    padding-right: 0;
    padding-bottom: 8px;
    margin-bottom: 4px;
    border-right: none;
    border-bottom: 1px solid rgba(255, 179, 102, 0.2);
    width: 100%;
    justify-content: flex-start;
  }
  
  .language-selector select {
    padding: 5px 6px;
    font-size: 12px;
    min-width: 46px;
    border-radius: 5px;
  }
}

/* Small mobile optimization */
@media (max-width: 480px) {
  .language-selector select {
    padding: 4px 5px;
    font-size: 11px;
    min-width: 42px;
  }
}

/* ============================================
   RESPONSIVE: SMALL MOBILE
   ============================================ */

@media (max-width: 480px) {
  /* Hero */
  .hero {
    min-height: 500px;
    height: auto;
    padding-left: 15px;
    padding-right: 15px;
    padding-bottom: 30px;
  }
  
  .hero-content {
    margin-top: 0;
    padding-top: 0;
  }
  
  .hero-content h1 {
    font-size: 28px;
    margin-bottom: 5px;
  }
  
  .hero-content p {
    font-size: 12px;
    margin-bottom: 6px;
  }

  /* Base fonts */
  p {
    font-size: 12px;
  }
  
  span {
    font-size: 12px;
  }

  /* About */
  .about-general {
    padding: 30px 15px;
    gap: 30px;
  }
  
  .profile-img img {
    max-width: 250px;
  }
  
  .profile-text h2 {
    font-size: 22px;
    margin-bottom: 15px;
  }
  
  .profile-text p {
    font-size: 12px;
  }

  /* Content */
  .contents {
    padding: 30px 15px;
  }
  
  .contents h2 {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .content-item h3 {
    font-size: 16px;
  }
  
  .content-item p {
    font-size: 12px;
  }

  /* Lists */
  ul {
    padding-left: 1rem;
  }
}