@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

/* CSS Variables for Samsung One UI Design System */
:root {
  --font-title: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Primary Accent: Samsung One UI Blue */
  --accent-color: #0c66e4;
  --accent-color-rgb: 12, 102, 228;
  --accent-hover: #0055c4;
  
  /* Color Semantics for Cards/Controls */
  --c-blue: #2d68c4;
  --c-blue-bg: rgba(45, 104, 196, 0.12);
  --c-green: #2e7d32;
  --c-green-bg: rgba(46, 125, 50, 0.12);
  --c-yellow: #b26a00;
  --c-yellow-bg: rgba(178, 106, 0, 0.12);
  --c-red: #c62828;
  --c-red-bg: rgba(198, 40, 40, 0.12);
  --c-purple: #6a1b9a;
  --c-purple-bg: rgba(106, 27, 154, 0.12);
  --c-cyan: #00838f;
  --c-cyan-bg: rgba(0, 131, 143, 0.12);

  /* Light Theme Defaults */
  --bg-primary: #f4f5f8;
  --bg-secondary: #ffffff;
  --bg-secondary-rgb: 255, 255, 255;
  --text-primary: #121214;
  --text-secondary: #6e6e73;
  --text-tertiary: #a1a1a6;
  --border-color: rgba(0, 0, 0, 0.05);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.02), 0 1px 3px rgba(0, 0, 0, 0.02);
  --hover-bg: rgba(0, 0, 0, 0.03);
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-border: rgba(0, 0, 0, 0.06);
  --header-height-expanded: 180px;
  --header-height-collapsed: 70px;
  --transition-speed: 0.3s;
  --spring-easing: cubic-bezier(0.25, 1, 0.5, 1);
}

/* Dark Theme Variables */
body.dark-mode {
  --bg-primary: #000000; /* True Black for OLED */
  --bg-secondary: #161618;
  --bg-secondary-rgb: 22, 22, 24;
  --text-primary: #f5f5f7;
  --text-secondary: #8e8e93;
  --text-tertiary: #5c5c60;
  --border-color: rgba(255, 255, 255, 0.06);
  --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  --hover-bg: rgba(255, 255, 255, 0.04);
  --nav-bg: rgba(22, 22, 24, 0.8);
  --nav-border: rgba(255, 255, 255, 0.08);

  /* Adjust Semantics for Dark Mode Contrast */
  --c-blue: #64b5f6;
  --c-blue-bg: rgba(100, 181, 246, 0.15);
  --c-green: #81c784;
  --c-green-bg: rgba(129, 199, 132, 0.15);
  --c-yellow: #ffd54f;
  --c-yellow-bg: rgba(255, 213, 79, 0.15);
  --c-red: #e57373;
  --c-red-bg: rgba(229, 115, 115, 0.15);
  --c-purple: #ba68c8;
  --c-purple-bg: rgba(186, 104, 200, 0.15);
  --c-cyan: #4dd0e1;
  --c-cyan-bg: rgba(77, 208, 225, 0.15);
}

/* General & Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  transition: background-color var(--transition-speed) var(--spring-easing),
              color var(--transition-speed) var(--spring-easing);
  overflow-x: hidden;
  padding-bottom: 90px; /* Offset bottom nav dock */
}

/* Squircles - One UI Signature Rounded Element */
.squircle {
  width: 44px;
  height: 44px;
  border-radius: 16px; /* Mimics Samsung Super-Ellipse */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.squircle i {
  display: block;
}

/* Squircles Accent Colors */
.sq-blue { background-color: var(--c-blue-bg); color: var(--c-blue); }
.sq-green { background-color: var(--c-green-bg); color: var(--c-green); }
.sq-yellow { background-color: var(--c-yellow-bg); color: var(--c-yellow); }
.sq-red { background-color: var(--c-red-bg); color: var(--c-red); }
.sq-purple { background-color: var(--c-purple-bg); color: var(--c-purple); }
.sq-cyan { background-color: var(--c-cyan-bg); color: var(--c-cyan); }

/* One UI App/Settings Icons (Rounded Squircles) */
.card-icon-container {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

/* Focus Blocks (Unified One UI Cards) */
.focus-block {
  background-color: var(--bg-secondary);
  border-radius: 28px; /* Extremely rounded One UI signature */
  padding: 24px;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  transition: transform 0.25s var(--spring-easing), 
              box-shadow 0.25s var(--spring-easing),
              background-color var(--transition-speed) var(--spring-easing);
}

.focus-block:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.04);
}

body.dark-mode .focus-block:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  border-color: rgba(255,255,255,0.1);
}

/* Section Title - Monotone & Clean Setting Style */
.section-title {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-left: 8px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background-color: var(--border-color);
}

/* One UI 8.5 Smooth Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--hover-bg);
  border: 1px solid var(--border-color);
  transition: 0.3s var(--spring-easing);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: #8e8e93;
  transition: 0.3s var(--spring-easing);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #ffffff;
}

.settings-list-header {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.8px;
  margin: 24px 0 8px 20px;
}

/* Settings Items & Lists */
.settings-list {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s ease;
}

.settings-item:last-child {
  border-bottom: none;
}

.settings-item:hover {
  background-color: var(--hover-bg);
}

.settings-item-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-grow: 1;
}

.settings-item-title {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.settings-item-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 1px;
}

.settings-item-right {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.settings-badge {
  background-color: var(--hover-bg);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* Main Container Layout */
.oneui-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
}

/* One UI 8.5 Collapsible Large Header */
.oneui-header-container {
  position: relative;
  z-index: 100;
}

.oneui-header {
  height: var(--header-height-expanded);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 24px;
  transition: height 0.2s var(--spring-easing), padding-bottom 0.2s var(--spring-easing);
  position: relative;
}

.oneui-header-inner {
  text-align: center;
  width: 100%;
}

.oneui-header-title {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  transition: font-size 0.2s var(--spring-easing), transform 0.2s var(--spring-easing);
}

.oneui-header-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
  font-weight: 500;
  transition: opacity 0.2s var(--spring-easing), transform 0.2s var(--spring-easing);
}

/* Sticky top navigation that appears when scrolled */
.oneui-sticky-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height-collapsed);
  background-color: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.2s var(--spring-easing), transform 0.2s var(--spring-easing);
}

.oneui-sticky-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.scrolled .oneui-header {
  height: var(--header-height-collapsed);
  padding-bottom: 0;
}

.scrolled .oneui-header-title {
  font-size: 1.4rem;
  transform: translateY(-12px);
  opacity: 0;
}

.scrolled .oneui-header-subtitle {
  opacity: 0;
  transform: translateY(-12px);
}

.scrolled .oneui-sticky-bar {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Hero Section Widget style */
.oneui-hero-card {
  text-align: center;
  padding: 32px 24px;
}

.oneui-profile-container {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto 20px;
}

.oneui-profile-pic {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50px; /* Squircle avatar */
  border: 4px solid var(--bg-secondary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s var(--spring-easing);
}

.oneui-profile-container:hover .oneui-profile-pic {
  transform: scale(1.03);
}

.oneui-hero-badge {
  background-color: var(--c-blue-bg);
  color: var(--c-blue);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.oneui-hero-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 16px auto 0;
  line-height: 1.6;
}

/* Mini Quick Status Panel / Dashboard */
.status-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.status-card {
  background-color: var(--bg-secondary);
  border-radius: 24px;
  padding: 16px;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease;
}

.status-card:hover {
  transform: translateY(-2px);
}

.status-val {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1.2;
}

.status-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
  font-weight: 500;
}

/* Skill UI Grid Cards styling */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
  width: 100%;
}

.skill-card {
  background-color: var(--hover-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: transform 0.2s var(--spring-easing), background-color 0.2s var(--spring-easing), border-color 0.2s var(--spring-easing);
  cursor: default;
}

.skill-card:hover {
  transform: translateY(-2px);
  background-color: var(--bg-secondary);
  border-color: rgba(var(--accent-color-rgb), 0.2);
}

.skill-card-info {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.skill-card-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.skill-card-category {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 1px;
}


/* Custom categories tabs in One UI style */
.category-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.cat-badge {
  background-color: var(--hover-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cat-badge.active, .cat-badge:hover {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

/* Projects Cards (Focus Block style) */
.project-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.project-title {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.project-bullet {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-left: 8px;
  position: relative;
  padding-left: 14px;
  margin-top: 6px;
}

.project-bullet::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

.tech-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.tech-badge {
  background-color: var(--hover-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* Samsung Buttons styling */
.oneui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--accent-color);
  color: #ffffff !important;
  font-weight: 500;
  border: none;
  border-radius: 20px;
  padding: 10px 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.2s;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(var(--accent-color-rgb), 0.15);
}

.oneui-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.oneui-btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: transparent;
  color: var(--accent-color) !important;
  border: 1px solid var(--accent-color);
  border-radius: 20px;
  padding: 9px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  text-decoration: none;
}

.oneui-btn-outline:hover {
  background-color: rgba(var(--accent-color-rgb), 0.05);
}

.btn-group-custom {
  display: flex;
  gap: 12px;
  margin-top: 14px;
}

/* Timelines / Education style */
.oneui-timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  padding-left: 28px;
}

.oneui-timeline::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 9px;
  width: 2px;
  height: calc(100% - 24px);
  background-color: var(--border-color);
}

.timeline-event {
  position: relative;
  margin-bottom: 24px;
}

.timeline-event:last-child {
  margin-bottom: 0;
}

.timeline-event::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 3px solid var(--accent-color);
  z-index: 2;
}

.timeline-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.timeline-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
  line-height: 1.4;
}

/* Dynamic Bottom Reachability Dock */
.oneui-nav-dock {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background-color: var(--nav-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--nav-border);
  border-radius: 40px;
  padding: 8px 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 4px;
  max-width: 95%;
  transition: background-color var(--transition-speed), border var(--transition-speed);
}

body.dark-mode .oneui-nav-dock {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.dock-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.7rem;
  font-weight: 600;
  transition: all 0.25s var(--spring-easing);
  min-width: 50px;
}

.dock-item i {
  font-size: 1.15rem;
  margin-bottom: 3px;
  transition: transform 0.2s ease;
}

.dock-item:hover {
  color: var(--text-primary);
}

.dock-item:hover i {
  transform: translateY(-2px);
}

.dock-item.active {
  background-color: var(--hover-bg);
  color: var(--accent-color);
}

/* Custom Contact Form */
.oneui-form-group {
  margin-bottom: 16px;
}

.oneui-input {
  width: 100%;
  background-color: var(--hover-bg);
  border: 1px solid var(--border-color);
  border-radius: 18px; /* Smooth rounded shape */
  padding: 14px 18px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color 0.2s, background-color 0.2s;
  outline: none;
}

.oneui-input:focus {
  border-color: var(--accent-color);
  background-color: var(--bg-secondary);
}

textarea.oneui-input {
  resize: none;
  min-height: 120px;
}

/* Custom Social Contact Grid in One UI settings menu shape */
.oneui-social-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 10px;
}

.social-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 16px 8px;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s, background-color 0.2s;
  box-shadow: var(--card-shadow);
}

.social-card:hover {
  transform: translateY(-3px);
  background-color: var(--hover-bg);
}

.social-card span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Footer styling */
.oneui-footer {
  text-align: center;
  padding: 40px 16px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-color);
  margin-top: 40px;
}

/* Responsiveness adjustments */
@media (max-width: 600px) {
  :root {
    --header-height-expanded: 160px;
  }
  
  .oneui-header-title {
    font-size: 1.8rem;
  }
  
  .dock-item span {
    display: none; /* Hide text on small screens, keep icons only for premium compact feel */
  }
  
  .dock-item {
    padding: 10px;
    min-width: 44px;
  }
  
  .dock-item i {
    font-size: 1.3rem;
    margin-bottom: 0;
  }
  
  .status-grid {
    gap: 8px;
  }
  
  .status-card {
    padding: 12px 6px;
  }
  
  .status-val {
    font-size: 1.15rem;
  }
  
  .status-label {
    font-size: 0.65rem;
  }
}