/* ========================================================= 
00 — GLOBAL THEME + VARIABLES (DEFAULT = DARK)
========================================================= */
:root {
  --bg: #0d1117;
  --bg-light: #161b22;
  --text: #e6edf3;
  --text-light: #a7b3c5;
  --accent: #4ea5ff;
  --border: #273043;
  --card-shadow: rgba(0, 0, 0, 0.4);

  --radius: 14px;
  --transition-speed: 0.25s;
  --font-heading: 'Poppins', system-ui;
  --font-body: 'Inter', system-ui;
}

/* =========================================================
LIGHT THEME
========================================================= */
[data-theme="light"] {
  --bg: #f8f9ff;
  --bg-light: #ffffff;
  --text: #1b1f24;
  --text-light: #4d5562;
  --accent: #0056ff;
  --border: #d4d8e8;
  --card-shadow: rgba(0, 0, 0, 0.15);
}

/* =========================================================
01 — RESET
========================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  scroll-behavior: smooth;
  transition: background var(--transition-speed), color var(--transition-speed);
}

body {
  padding-top: 72px;
}

img { max-width: 100%; display: block; }
ul { list-style: none; }

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-speed);
}

.container {
  width: 90%;
  margin: auto;
  max-width: 1200px;
}

/* =========================================================
02 — HEADER (UPDATED)
========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;

  background: rgba(15, 18, 22, 0.45);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);

  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: box-shadow .25s ease, background .25s ease;
}

/* Light-mode fix */
[data-theme="light"] .site-header {
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

/* Shadow only when scrolling */
body.scrolled .site-header {
  box-shadow: 0 4px 18px rgba(0,0,0,0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 18px;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

/* ================= NAVIGATION ================== */
.nav ul {
  display: flex;
  gap: 24px;
}

.nav a {
  position: relative;
  padding: 6px 8px;
  font-size: 15px;
  display: inline-block;
}

/* Animated underline */
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width .25s;
}

/* Hover underline */
.nav a:hover::after {
  width: 100%;
}

/* Active page underline */
.nav a.active::after {
  width: 100%;
}

/* Text color adjustments */
[data-theme="light"] .nav a {
  color: #0d1117 !important;
}

[data-theme="dark"] .nav a {
  color: #e6edf3;
}

/* ================= MOBILE ================== */
.hamburger {
  display: none;
  font-size: 26px;
  background: none;
  border: none;
  color: var(--text);
}

@media(max-width: 900px) {
  .nav {
    display: none;
    position: absolute;
    top: 70px;
    right: 20px;
    width: 180px;

    background: rgba(15,18,22,0.55);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);

    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 15px;
  }

  [data-theme="light"] .nav {
    background: rgba(255,255,255,0.55);
    border: 1px solid rgba(0,0,0,0.1);
  }

  .nav ul {
    flex-direction: column;
    gap: 12px;
  }

  .hamburger {
    display: block;
  }
}

/* =========================================================
03 — BUTTONS
========================================================= */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  background: var(--accent);
  color: #fff;
  border: none;
  transition: var(--transition-speed);
}

.btn.small { padding: 8px 14px; }
.btn:hover { opacity: 0.85; }

.btn.ghost {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* =========================================================
03-b — THEME TOGGLE
========================================================= */
#themeBtn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text);
  transition: 0.25s;
}

/* =========================================================
04 — FOOTER
========================================================= */
.site-footer {
  width: 100%;
  margin-top: 40px;
  padding: 22px 0 12px;
  background: var(--bg-light);
  border-top: 1px solid var(--border);
}

.footer-container {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-about p {
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-light);
}

.footer-links ul { display: grid; gap: 5px; }
.footer-links a { font-size: 13px; color: var(--text-light); }
.footer-links a:hover { color: var(--accent); }

.footer-social .social-icons a {
  margin-right: 6px;
  font-size: 18px;
  color: var(--text-light);
  transition: color .2s ease, transform .2s ease;
}
.footer-social .social-icons a:hover {
  transform: translateY(-2px);
  color: var(--accent);
}

.footer-bottom {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  text-align: center;
  color: var(--text-light);
}

@media(max-width: 880px) {
  .footer-about,
  .footer-links,
  .footer-social {
    width: 100%;
  }
}

/* =========================================================
05 — SCROLL TO TOP
========================================================= */
#toTopBtn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 10px 14px;
  background: var(--accent);
  font-size: 18px;
  border-radius: 8px;
  border: none;
  color: #fff;
  cursor: pointer;
  display: none;
}

/* =========================================================
06 — WHATSAPP BUTTON
========================================================= */
#whatsappBtn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 52px;
  height: 52px;
}

#whatsappBtn img {
  width: 100%;
  height: 100%;
}

/* =========================================================
07 — SCROLL REVEAL ANIMATIONS
========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  filter: blur(8px);
  transition: 0.7s ease-out;
  will-change: opacity, transform, filter;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* Cleaner and smoother stagger animation */
.reveal:nth-child(n) {
  transition-delay: calc(0.1s * var(--i, 1));
}

/* Directional Variants */
.reveal.fade-left  { transform: translateX(-50px); }
.reveal.fade-right { transform: translateX(50px);  }
.reveal.fade-up    { transform: translateY(50px); }
.reveal.scale      { transform: scale(0.85); }

.reveal.visible.fade-left,
.reveal.visible.fade-right,
.reveal.visible.fade-up,
.reveal.visible.scale {
  transform: translate(0) scale(1);
}

/* =========================================================
08 — STAT COUNTER ANIMATION
========================================================= */
.stat-number {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.stat-number.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile – slightly slower animations */
@media(max-width: 600px) {
  .reveal {
    transition-duration: 0.9s;
  }
}

/* ===========================
   HOBBIES – 3D CYLINDER STYLES
=========================== */

.hobbies-section {
  padding: 80px 0;
  text-align: center;
}

.cylinder-wrapper {
  position: relative;
  width: 350px;
  height: 350px;
  margin: 60px auto;
  perspective: 1200px;
}

.cylinder {
  width: 100%;
  height: 100%;
  position: absolute;
  transform-style: preserve-3d;
  transition: transform 0.8s ease;
}

.cylinder img {
  position: absolute;
  top: 0;
  left: 0;
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
}

/* Navigation Buttons */
.cylinder-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: #ffffff;
  border: none;
  padding: 12px 16px;
  cursor: pointer;
  border-radius: 8px;
  font-size: 22px;
  color: #000;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  transition: 0.3s;
}

.cylinder-btn:hover {
  background: #000;
  color: #fff;
}

.cylinder-btn.prev {
  left: -60px;
}

.cylinder-btn.next {
  right: -60px;
}

/* =========================================================
09 — ABOUT PAGE IMAGE POPUP / CAROUSEL
========================================================= */

/* Image grid (gallery images) */
.gallery-image {
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border-radius: 12px;
}

.gallery-image:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 18px rgba(0,0,0,0.3);
}

/* Popup Background */
.image-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.65);
  display: flex;
  justify-content: center;
  align-items: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s ease;
  z-index: 9999;
}

/* Popup Active State */
.image-popup.active {
  visibility: visible;
  opacity: 1;
}

/* Popup Image */
.popup-image {
  max-width: 88%;
  max-height: 88%;
  border-radius: 14px;
  box-shadow: 0 4px 22px rgba(0,0,0,0.45);
}

/* Close Button */
.close-popup {
  position: absolute;
  top: 30px;
  right: 40px;
  font-size: 34px;
  color: #fff;
  cursor: pointer;
  transition: 0.25s ease;
}

.close-popup:hover {
  transform: scale(1.15);
  color: var(--accent);
}

/* =========================================================
10 — IMAGE CAROUSEL ANIMATION (ABOUT POPUP)
========================================================= */

/* Carousel Wrapper */
.image-carousel {
  position: relative;
  width: 100%;
  max-width: 900px;
  height: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* Each slide */
.carousel-slide {
  position: absolute;
  opacity: 0;
  transform: translateX(40px) scale(0.97);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
  will-change: opacity, transform;
}

/* When the slide is active */
.carousel-slide.active {
  opacity: 1;
  transform: translateX(0) scale(1);
  z-index: 2;
}

/* Fade-out class */
.carousel-slide.fade-out {
  opacity: 0;
  transform: translateX(-40px) scale(0.97);
  z-index: 1;
}

/* Carousel nav buttons */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: rgba(255,255,255,0.8);
  padding: 12px 16px;
  font-size: 22px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  transition: transform 0.25s ease;
}

.carousel-btn:hover {
  transform: translateY(-50%) scale(1.15);
}

/* Left / Right button positions */
.carousel-btn.prev {
  left: 30px;
}
.carousel-btn.next {
  right: 30px;
}

/* Popup image animation (smooth Zoom-in) */
.popup-image {
  animation: popupZoom 0.45s ease;
}

@keyframes popupZoom {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Smooth transition for popup open */
.image-popup.active {
  animation: fadePopup 0.35s ease;
}

@keyframes fadePopup {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Auto-swiper progress indicator (optional) */
.carousel-progress {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  height: 4px;
  width: 120px;
  background: rgba(255,255,255,0.4);
  overflow: hidden;
  border-radius: 3px;
}

.carousel-progress .fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  animation: progressFill 4s linear infinite;
}

@keyframes progressFill {
  from { width: 0%; }
  to   { width: 100%; }
}