/* -------------------------------------------------------------
 * Small Stack — Developer Portfolio Design System
 * Theme: Editorial, Professional, Calm Pastel Tones
 * (Strictly: No glow, no neon, no cyberpunk, no hyper-vibrant noise)
 * ------------------------------------------------------------- */

:root {
  /* Warm Pastel Foundation */
  --bg-page: #FBF9F5;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #F6F3ED;
  --bg-alt: #F3EFE8;
  --bg-nav: rgba(255, 255, 255, 0.85);
  
  --bg-gradient-1: rgba(234, 241, 236, 0.8);
  --bg-gradient-2: rgba(250, 240, 235, 0.7);
  --bg-gradient-3: rgba(237, 241, 247, 0.6);

  /* Text & Contrast (Warm Charcoal, High Readability) */
  --text-main: #1F242B;
  --text-muted: #566171;
  --text-light: #7E899B;
  --text-subtle: #9EA8B6;
  
  /* Borders & Dividers */
  --border-light: #ECE6DC;
  --border-medium: #DDD6CA;
  --border-card: rgba(31, 36, 43, 0.08);

  /* Curated Pastel Accents */
  --pastel-sage-bg: #EAF1EC;
  --pastel-sage-border: #C8DDD0;
  --pastel-sage-dark: #325845;
  
  --pastel-peach-bg: #FAF0EB;
  --pastel-peach-border: #F0D5C7;
  --pastel-peach-dark: #8A4A33;
  
  --pastel-mist-bg: #EDF1F7;
  --pastel-mist-border: #D1DCEB;
  --pastel-mist-dark: #3A4B69;

  --pastel-sand-bg: #F7F4EB;
  --pastel-sand-border: #E5DFC8;
  --pastel-sand-dark: #6C5B2F;

  /* Primary Button / Studio Accents */
  --btn-primary-bg: #27313D;
  --btn-primary-hover: #171E26;
  --btn-text: #FFFFFF;

  /* Organic Soft Shadows (No neon glows) */
  --shadow-sm: 0 2px 6px rgba(28, 33, 40, 0.03), 0 1px 2px rgba(28, 33, 40, 0.02);
  --shadow-md: 0 8px 24px rgba(28, 33, 40, 0.05), 0 2px 6px rgba(28, 33, 40, 0.03);
  --shadow-lg: 0 18px 42px rgba(28, 33, 40, 0.07), 0 4px 12px rgba(28, 33, 40, 0.03);
  --shadow-card-hover: 0 20px 45px rgba(28, 33, 40, 0.08), 0 4px 12px rgba(28, 33, 40, 0.03);

  /* Radius */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 30px;
  --radius-pill: 9999px;

  /* Transitions */
  --ease-smooth: 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* -------------------------------------------------------------
 * Theme & Brand Palettes
 * ------------------------------------------------------------- */
/* Sage Earth (Labour Lekka) */
[data-theme="sage"] {
  --bg-page: #F0F5F2;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #E3EFE7;
  --bg-alt: #DAE8DF;
  --bg-nav: rgba(255, 255, 255, 0.88);
  --bg-gradient-1: rgba(212, 230, 218, 0.7);
  --bg-gradient-2: rgba(232, 240, 230, 0.6);
  --bg-gradient-3: rgba(200, 222, 208, 0.5);
  --text-main: #182C22;
  --text-muted: #3B5446;
  --text-light: #60796B;
  --text-subtle: #8BA496;
  --border-light: #CFE3D6;
  --border-medium: #B8D4C2;
  --border-card: rgba(24, 44, 34, 0.09);
  --btn-primary-bg: #274C3A;
  --btn-primary-hover: #1A3628;
  --btn-text: #FFFFFF;
}

/* Balnce Lime & Obsidian Black */
[data-theme="balnce"] {
  --bg-page: #0A0E13;
  --bg-card: #131822;
  --bg-card-subtle: #1B2230;
  --bg-alt: #10141D;
  --bg-nav: rgba(19, 24, 34, 0.88);
  --bg-gradient-1: rgba(166, 228, 22, 0.12);
  --bg-gradient-2: rgba(22, 40, 25, 0.35);
  --bg-gradient-3: rgba(12, 22, 16, 0.4);
  --text-main: #F4F8FA;
  --text-muted: #9BB0C1;
  --text-light: #71879B;
  --text-subtle: #485A6D;
  --border-light: #222B3A;
  --border-medium: #303B4E;
  --border-card: rgba(166, 228, 22, 0.15);
  --pastel-sage-bg: #1B2B1D;
  --pastel-sage-border: #325235;
  --pastel-sage-dark: #A6E416;
  --pastel-peach-bg: #1B2B1D;
  --pastel-peach-border: #325235;
  --pastel-peach-dark: #A6E416;
  --pastel-mist-bg: #1A2636;
  --pastel-mist-border: #2B3D56;
  --pastel-mist-dark: #A6E416;
  --pastel-sand-bg: #1F281B;
  --pastel-sand-border: #37482F;
  --pastel-sand-dark: #B8F028;
  --btn-primary-bg: #A6E416;
  --btn-primary-hover: #BBF033;
  --btn-text: #0A0E13;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 42px rgba(0, 0, 0, 0.6);
  --shadow-card-hover: 0 20px 45px rgba(0, 0, 0, 0.7);
}

/* Midnight Studio (Dark Mode) */
[data-theme="dark"] {
  --bg-page: #0F1216;
  --bg-card: #161B22;
  --bg-card-subtle: #1F2630;
  --bg-alt: #14181F;
  --bg-nav: rgba(22, 27, 34, 0.88);
  --bg-gradient-1: rgba(35, 52, 72, 0.4);
  --bg-gradient-2: rgba(26, 42, 36, 0.35);
  --bg-gradient-3: rgba(18, 24, 34, 0.5);
  --text-main: #F0F6FC;
  --text-muted: #8B949E;
  --text-light: #6E7681;
  --text-subtle: #484F58;
  --border-light: #21262D;
  --border-medium: #30363D;
  --border-card: rgba(240, 246, 252, 0.1);
  --pastel-sage-bg: #1C2B22;
  --pastel-sage-border: #2D4839;
  --pastel-sage-dark: #8FD8AC;
  --pastel-peach-bg: #2B211C;
  --pastel-peach-border: #4A352B;
  --pastel-peach-dark: #F3B096;
  --pastel-mist-bg: #1B2535;
  --pastel-mist-border: #2C3E57;
  --pastel-mist-dark: #9FBFED;
  --pastel-sand-bg: #2A261B;
  --pastel-sand-border: #463D2A;
  --pastel-sand-dark: #E2CD93;
  --btn-primary-bg: #F0F6FC;
  --btn-primary-hover: #FFFFFF;
  --btn-text: #0F1216;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 42px rgba(0, 0, 0, 0.6);
  --shadow-card-hover: 0 20px 45px rgba(0, 0, 0, 0.7);
}

/* Base Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(ellipse at 15% 10%, var(--bg-gradient-1) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 25%, var(--bg-gradient-2) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 80%, var(--bg-gradient-3) 0%, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.025em;
}

p {
  color: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
}

/* -------------------------------------------------------------
 * Floating Navigation Header
 * ------------------------------------------------------------- */
.header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 16px;
}

.nav-container {
  width: 100%;
  max-width: 960px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  background: var(--bg-nav);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: all var(--ease-smooth);
}

.nav-container:hover {
  box-shadow: var(--shadow-md);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--pastel-sage-bg);
  border: 1px solid var(--pastel-sage-border);
  color: var(--pastel-sage-dark);
  border-radius: 9px;
  overflow: hidden;
}

.brand-badge.small {
  width: 26px;
  height: 26px;
  border-radius: 7px;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  display: block;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 22px;
}

.nav-item {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--ease-smooth);
  position: relative;
  padding: 4px 2px;
}

.nav-item:hover {
  color: var(--text-main);
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--pastel-sage-dark);
  background: var(--pastel-sage-bg);
  border: 1px solid var(--pastel-sage-border);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: var(--pastel-sage-dark);
  border-radius: 50%;
}

/* -------------------------------------------------------------
 * Hero Section
 * ------------------------------------------------------------- */
.hero-section {
  padding: 140px 20px 80px;
  display: flex;
  justify-content: center;
}

.hero-wrapper {
  max-width: 820px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--pastel-sand-bg);
  border: 1px solid var(--pastel-sand-border);
  color: var(--pastel-sand-dark);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
}

.pill-spark {
  color: var(--pastel-peach-dark);
  font-size: 0.9rem;
}

.hero-title {
  font-size: clamp(2.4rem, 4.8vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.14;
  margin-bottom: 20px;
  color: var(--text-main);
}

.hero-description {
  font-size: clamp(1.05rem, 1.7vw, 1.22rem);
  color: var(--text-muted);
  max-width: 660px;
  line-height: 1.68;
  margin-bottom: 34px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--btn-primary-bg);
  color: var(--btn-text);
  font-weight: 600;
  font-size: 0.96rem;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: all var(--ease-smooth);
}

.cta-primary:hover {
  background: var(--btn-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.cta-secondary {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.96rem;
  padding: 13px 22px;
  border-radius: var(--radius-pill);
  transition: all var(--ease-smooth);
}

.cta-secondary:hover {
  background: var(--bg-card);
  border-color: var(--text-main);
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 780px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: all var(--ease-smooth);
}

.highlight-item strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-main);
}

.highlight-item span {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.3;
  display: block;
}

.highlight-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex-shrink: 0;
}

.icon-sage { background: var(--pastel-sage-bg); color: var(--pastel-sage-dark); }
.icon-peach { background: var(--pastel-peach-bg); color: var(--pastel-peach-dark); }
.icon-mist { background: var(--pastel-mist-bg); color: var(--pastel-mist-dark); }

/* -------------------------------------------------------------
 * Section Containers & Headers
 * ------------------------------------------------------------- */
.section-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-kicker {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-light);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.04rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------------
 * Streamlined Apps Showcase Cards
 * ------------------------------------------------------------- */
.apps-section {
  padding: 70px 0 90px;
}

.app-card {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 44px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--ease-smooth), transform var(--ease-smooth);
}

.app-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.app-card-sage {
  background: linear-gradient(150deg, var(--bg-card) 70%, var(--pastel-sage-bg) 100%);
  border-color: var(--pastel-sage-border);
}

.app-card-peach {
  background: linear-gradient(150deg, var(--bg-card) 70%, var(--pastel-peach-bg) 100%);
  border-color: var(--pastel-peach-border);
}

.app-card-balnce {
  background: linear-gradient(150deg, var(--bg-card) 60%, rgba(166, 228, 22, 0.08) 100%);
  border-color: rgba(166, 228, 22, 0.25);
}

.app-main-content {
  display: flex;
  flex-direction: column;
}

.app-header-meta {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}

.app-logo-box {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
  background: #000;
}

.app-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.app-naming {
  display: flex;
  flex-direction: column;
}

.app-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.tag-pill {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.tag-sage { background: var(--pastel-sage-bg); color: var(--pastel-sage-dark); }
.tag-peach { background: var(--pastel-peach-bg); color: var(--pastel-peach-dark); }
.tag-balnce { background: rgba(166, 228, 22, 0.14); color: #A6E416; border: 1px solid rgba(166, 228, 22, 0.3); }
.tag-neutral { background: var(--pastel-sand-bg); color: var(--pastel-sand-dark); }
.tag-outline {
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--text-light);
}

.app-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.app-tagline {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.app-description {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}

/* Feature Grid */
.app-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.feature-card {
  display: flex;
  gap: 12px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-card);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
}

.feat-icon {
  font-size: 1.25rem;
  line-height: 1.2;
}

.feature-card h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 3px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* App Sidebar Panel (Highlights + Play Store CTA) */
.app-sidebar-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-card);
  padding: 26px;
  border-radius: var(--radius-lg);
}

.specs-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.specs-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
}

.spec-label {
  color: var(--text-muted);
}

.spec-val {
  font-weight: 700;
  color: var(--text-main);
}

/* Playstore CTA Button */
.btn-playstore {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--btn-primary-bg);
  color: var(--btn-text);
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--ease-smooth);
  width: 100%;
}

.btn-play-sage:hover {
  background: var(--pastel-sage-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-play-peach:hover {
  background: var(--pastel-peach-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-play-balnce:hover {
  background: #A6E416;
  color: #0A0E13;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-play-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.btn-play-text small {
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  opacity: 0.8;
  font-weight: 600;
  line-height: 1;
}

.btn-play-text strong {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
}

/* -------------------------------------------------------------
 * Principles & Philosophy Section
 * ------------------------------------------------------------- */
.philosophy-section {
  padding: 80px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.principle-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--ease-smooth);
}

.principle-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.principle-number {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--pastel-peach-dark);
  background: var(--pastel-peach-bg);
  display: inline-flex;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
}

.principle-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.principle-card p {
  font-size: 0.92rem;
  line-height: 1.6;
}

/* -------------------------------------------------------------
 * About Developer Section
 * ------------------------------------------------------------- */
.about-section {
  padding: 90px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.about-heading {
  font-size: clamp(1.8rem, 2.8vw, 2.3rem);
  margin-bottom: 18px;
}

.about-copy p {
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.tech-stack-row {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.tech-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tag {
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-medium);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  color: var(--text-main);
}

.about-stats-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.stat-val {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* -------------------------------------------------------------
 * Contact & Feedback Card
 * ------------------------------------------------------------- */
.contact-section {
  padding: 40px 0 90px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.contact-content {
  max-width: 620px;
  margin: 0 auto;
}

.contact-content h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  margin-bottom: 12px;
}

.contact-content p {
  font-size: 1rem;
  margin-bottom: 28px;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-copy-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--btn-primary-bg);
  color: var(--btn-text);
  border: none;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--ease-smooth);
  box-shadow: var(--shadow-sm);
}

.btn-copy-email:hover {
  background: var(--btn-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-mail-direct {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  transition: all var(--ease-smooth);
}

.btn-mail-direct:hover {
  background: var(--bg-card);
  border-color: var(--text-main);
}

/* -------------------------------------------------------------
 * Footer
 * ------------------------------------------------------------- */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  padding: 60px 0 30px;
}

.footer-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 36px;
}

.footer-brand {
  max-width: 320px;
}

.footer-tagline {
  font-size: 0.86rem;
  margin-top: 10px;
  color: var(--text-muted);
}

.footer-links-group {
  display: flex;
  gap: 52px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col-title {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.86rem;
  color: var(--text-muted);
  transition: color var(--ease-smooth);
}

.footer-col a:hover {
  color: var(--text-main);
}

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

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

/* Toast Popup */
.toast-popup {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
  background: var(--text-main);
  color: #FFFFFF;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28), opacity 0.3s ease;
  z-index: 999;
}

.toast-popup.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast-icon {
  color: #7CE0A4;
  font-weight: 800;
}

/* -------------------------------------------------------------
 * Responsive Media Queries
 * ------------------------------------------------------------- */
@media (max-width: 980px) {
  .app-card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px 24px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .principles-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero-highlights {
    grid-template-columns: 1fr;
  }

  .app-features-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
  }

  .bottom-bar {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding-top: 110px;
  }

  .app-header-meta {
    flex-direction: column;
  }

  .contact-card {
    padding: 32px 20px;
  }
}

/* -------------------------------------------------------------
 * Global Theme Transitions
 * ------------------------------------------------------------- */
body, nav, .header, .app-card, .principle-card, .stat-card, .contact-card, .footer, .btn-primary-bg, .btn-secondary, .tag-pill, .tech-tag {
  transition: background-color 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              color 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              border-color 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* -------------------------------------------------------------
 * Floating Nav Island Revolving Progress Border
 * ------------------------------------------------------------- */
.nav-container {
  position: relative;
}

.nav-progress-svg {
  position: absolute;
  top: -1px;
  left: -1px;
  width: calc(100% + 2px);
  height: calc(100% + 2px);
  pointer-events: none;
  z-index: 10;
  border-radius: var(--radius-pill);
  overflow: visible;
}

.nav-progress-rect {
  fill: none;
  stroke: var(--pastel-sage-dark);
  stroke-width: 2.5px;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.1s linear, stroke 0.35s ease;
}

[data-theme="sage"] .nav-progress-rect {
  stroke: #325845;
}

[data-theme="balnce"] .nav-progress-rect {
  stroke: #A6E416;
}

[data-theme="dark"] .nav-progress-rect {
  stroke: #8FD8AC;
}

/* -------------------------------------------------------------
 * Theme Switcher Component
 * ------------------------------------------------------------- */
.theme-switcher-wrapper {
  position: relative;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--ease-smooth);
}

.theme-toggle-btn:hover {
  background: var(--bg-card);
  border-color: var(--text-muted);
  box-shadow: var(--shadow-sm);
}

.theme-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #325845;
  transition: background-color var(--ease-smooth);
}

[data-theme="sage"] .theme-dot { background: #325845; }
[data-theme="balnce"] .theme-dot { background: #A6E416; }
[data-theme="dark"] .theme-dot { background: #8FD8AC; }

.theme-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transition: all var(--ease-smooth);
  z-index: 200;
}

.theme-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.theme-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  text-align: left;
  transition: all var(--ease-smooth);
}

.theme-opt:hover {
  background: var(--bg-card-subtle);
  color: var(--text-main);
}

.theme-opt.active {
  background: var(--bg-alt);
  color: var(--text-main);
  font-weight: 700;
}

.dot-icon {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.dot-default { background: #27313D; }
.dot-sage { background: #325845; }
.dot-balnce { background: #A6E416; }
.dot-dark { background: #8FD8AC; }



/* -------------------------------------------------------------
 * Micro-Animations: Sparkle Particle & Counter
 * ------------------------------------------------------------- */
.sparkle-particle {
  position: absolute;
  pointer-events: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pastel-sage-dark);
  animation: sparkleFly 0.75s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  z-index: 999;
}

@keyframes sparkleFly {
  0% {
    opacity: 1;
    transform: translate(0, 0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(var(--dx), var(--dy)) scale(0.2);
  }
}