/* ==========================================================================
   DABHADE DIGITAL — style.css
   Table of Contents:
   1. CSS Reset
   2. CSS Variables (design tokens)
   3. Base / Typography
   4. Layout Utilities
   5. Buttons
   6. Loader
   7. Header / Nav
   8. Hero
   9. About
   10. Services
   11. Skills
   12. Portfolio
   13. Testimonials
   14. Contact
   15. Footer
   16. Back to top
   17. Keyframe Animations
   18. Scroll Reveal
   19. Dark Mode
   20. Media Queries
   ========================================================================== */

/* ==========================================================================
   1. CSS RESET
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { min-height: 100vh; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; }
p { line-height: 1.7; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   2. CSS VARIABLES
   ========================================================================== */
:root {
  /* Brand palette */
  --color-primary: #2563EB;
  --color-primary-rgb: 37, 99, 235;
  --color-secondary: #7C3AED;
  --color-secondary-rgb: 124, 58, 237;
  --color-accent: #06B6D4;
  --color-accent-rgb: 6, 182, 212;
  --color-dark: #0F172A;
  --color-dark-rgb: 15, 23, 42;
  --color-light: #F8FAFC;
  --color-text: #1E293B;
  --color-gray: #64748B;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  --gradient-mesh: radial-gradient(at 20% 20%, rgba(var(--color-primary-rgb), .25) 0, transparent 55%),
                    radial-gradient(at 80% 30%, rgba(var(--color-secondary-rgb), .22) 0, transparent 55%),
                    radial-gradient(at 50% 90%, rgba(var(--color-accent-rgb), .18) 0, transparent 55%);

  /* Surfaces (light mode default) */
  --bg-body: #ffffff;
  --bg-alt: var(--color-light);
  --bg-elevated: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.7);
  --border-color: rgba(15, 23, 42, 0.08);
  --text-primary: var(--color-text);
  --text-secondary: var(--color-gray);
  --text-inverse: #ffffff;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --fs-xs: 0.8rem;
  --fs-sm: 0.9rem;
  --fs-base: 1rem;
  --fs-lg: 1.15rem;
  --fs-xl: 1.4rem;
  --fs-2xl: clamp(1.8rem, 3vw, 2.4rem);
  --fs-3xl: clamp(2.4rem, 5vw, 3.6rem);

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;

  /* Radius / shadow */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.14);
  --shadow-glow: 0 10px 40px rgba(var(--color-primary-rgb), 0.35);

  /* Layout */
  --container-w: 1240px;
  --header-h: 78px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   3. BASE / TYPOGRAPHY
   ========================================================================== */
body {
  font-family: var(--font-body);
  background: var(--bg-body);
  color: var(--text-primary);
  transition: background var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--text-primary); }

.section__title {
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}
.section__title.center { text-align: center; }

.section__subtitle {
  color: var(--text-secondary);
  font-size: var(--fs-lg);
  max-width: 620px;
  margin-bottom: var(--space-8);
}
.section__subtitle.center { margin-left: auto; margin-right: auto; text-align: center; }

.section__head { max-width: 680px; margin: 0 auto var(--space-10); text-align: center; }
.section__head .section__subtitle { margin-bottom: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.08);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}
.eyebrow.center { display: inline-flex; }
.section__head .eyebrow { margin-left: auto; margin-right: auto; }

.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;
}

.skip-link {
  position: absolute; top: -60px; left: 12px; z-index: 10000;
  background: var(--color-primary); color: #fff; padding: 10px 18px;
  border-radius: var(--radius-sm); transition: top var(--transition-fast);
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   4. LAYOUT UTILITIES
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section { padding-block: var(--space-12); }
.section--alt { background: var(--bg-alt); }

/* ==========================================================================
   5. BUTTONS
   ========================================================================== */
.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-sm);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
.btn--sm { padding: 10px 20px; font-size: var(--fs-xs); }
.btn--lg { padding: 16px 34px; font-size: var(--fs-base); }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(var(--color-primary-rgb), 0.45); }
.btn--primary:active { transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-3px); }

/* ripple effect span injected via JS */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  transform: scale(0);
  animation: ripple-anim 0.6s ease-out;
  pointer-events: none;
}

/* ==========================================================================
   6. LOADER
   ========================================================================== */
.loader {
  position: fixed; inset: 0; z-index: 99999;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-5);
  background: var(--color-dark);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
.loader.is-hidden { opacity: 0; visibility: hidden; }

.loader__mark {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: #fff;
  display: flex; gap: 8px;
}
.loader__bracket { color: var(--color-accent); animation: pulse-soft 1.4s ease-in-out infinite; }
.loader__word { background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }

.loader__bar { width: 180px; height: 4px; background: rgba(255,255,255,0.12); border-radius: var(--radius-full); overflow: hidden; }
.loader__bar span { display: block; height: 100%; width: 40%; background: var(--gradient-accent); animation: loader-slide 1.1s ease-in-out infinite; border-radius: var(--radius-full); }

/* ==========================================================================
   7. HEADER / NAV
   ========================================================================== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  display: flex; align-items: center;
  background: transparent;
  transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base), backdrop-filter var(--transition-base);
}
.header.is-scrolled {
  height: 66px;
  background: var(--bg-header);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border-color);
}

.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); }

.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-heading); }
.logo__mark {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--gradient-primary);
  color: #fff; font-weight: 800; font-size: 0.95rem;
  box-shadow: var(--shadow-glow);
}
.logo__text { font-weight: 700; font-size: 1.2rem; color: var(--text-primary); }
.logo__text em { font-style: normal; color: var(--color-primary); }

.nav__list { display: flex; align-items: center; gap: var(--space-6); }
.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 6px 2px;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}
.nav__link::after {
  content: ''; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; background: var(--gradient-primary);
  transition: width var(--transition-base); border-radius: var(--radius-full);
}
.nav__link:hover, .nav__link.active { color: var(--color-primary); }
.nav__link:hover::after, .nav__link.active::after { width: 100%; }

.header__actions { display: flex; align-items: center; gap: var(--space-4); }

.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover { background: rgba(var(--color-primary-rgb), 0.08); transform: rotate(15deg); }
.theme-toggle .fa-sun { display: none; }

.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast); margin-inline: auto; }
.hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-active span:nth-child(2) { opacity: 0; }
.hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   8. HERO
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; z-index: -1; background: var(--bg-body); }
.hero__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(var(--color-dark-rgb),0.035) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(var(--color-dark-rgb),0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 80%);
}
.hero__blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.55; }
.hero__blob--1 { width: 480px; height: 480px; background: var(--color-primary); top: -120px; right: -100px; animation: float-blob 12s ease-in-out infinite; }
.hero__blob--2 { width: 380px; height: 380px; background: var(--color-secondary); bottom: -140px; left: -80px; animation: float-blob 14s ease-in-out infinite reverse; }

.hero__inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-10);
  align-items: center;
  padding-block: var(--space-10);
}

.hero__title {
  font-size: var(--fs-3xl);
  letter-spacing: -0.03em;
  margin-block: var(--space-5);
}
.hero__typed-wrap { display: block; background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__typed { -webkit-text-fill-color: var(--color-secondary); }
.hero__cursor { display: inline-block; width: 3px; height: 0.85em; background: var(--color-accent); margin-left: 3px; vertical-align: -0.1em; animation: blink 0.9s steps(1) infinite; }

.hero__subtitle { font-size: var(--fs-lg); color: var(--text-secondary); max-width: 540px; margin-bottom: var(--space-8); }

.hero__cta-group { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-10); }

.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}
.stat-card:hover { transform: translateY(-4px); }
.stat-card__num { font-family: var(--font-heading); font-size: 1.7rem; font-weight: 800; color: var(--color-primary); }
.stat-card__plus { font-family: var(--font-heading); font-size: 1.7rem; font-weight: 800; color: var(--color-primary); }
.stat-card__label { display: block; font-size: var(--fs-xs); color: var(--text-secondary); margin-top: 4px; }

.hero__visual { position: relative; }
.hero__float-wrap { position: relative; max-width: 460px; margin-inline: auto; animation: float-y 6s ease-in-out infinite; }

.browser-card {
  background: var(--color-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.08);
}
.browser-card__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot--red { background: #FF5F56; } .dot--yellow { background: #FFBD2E; } .dot--green { background: #27C93F; }
.browser-card__url {
  margin-left: auto; font-family: var(--font-mono); font-size: 0.7rem; color: rgba(255,255,255,0.5);
  display: flex; align-items: center; gap: 6px;
}
.browser-card__body { padding: var(--space-5); position: relative; }
.code-block { font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.8; color: #e2e8f0; white-space: pre; overflow-x: auto; }
.tok-key { color: #C084FC; } .tok-fn { color: #38BDF8; }

.mini-badge {
  position: absolute;
  display: flex; align-items: center; gap: 6px;
  background: rgba(6,182,212,0.15);
  border: 1px solid rgba(6,182,212,0.4);
  color: #67E8F9;
  font-size: 0.75rem; font-family: var(--font-heading); font-weight: 600;
  padding: 8px 14px; border-radius: var(--radius-full);
}
.mini-badge--1 { bottom: -14px; right: 18px; animation: pulse-soft 2.4s ease-in-out infinite; }

.float-chip {
  position: absolute;
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs); font-weight: 600; font-family: var(--font-heading);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
}
.float-chip i { color: var(--color-primary); }
.float-chip--1 { top: -20px; left: -30px; animation: float-y 5s ease-in-out infinite; }
.float-chip--2 { bottom: 30%; right: -40px; animation: float-y 6.5s ease-in-out infinite 0.5s; }
.float-chip--3 { top: 55%; left: -50px; animation: float-y 5.5s ease-in-out infinite 1s; }

.scroll-indicator {
  position: absolute; bottom: var(--space-6); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text-secondary); font-size: var(--fs-xs);
}
.scroll-indicator__mouse { width: 24px; height: 38px; border: 2px solid var(--border-color); border-radius: var(--radius-full); position: relative; }
.scroll-indicator__mouse span { position: absolute; top: 6px; left: 50%; transform: translateX(-50%); width: 4px; height: 8px; background: var(--color-primary); border-radius: var(--radius-full); animation: scroll-dot 1.6s ease-in-out infinite; }

/* ==========================================================================
   9. ABOUT
   ========================================================================== */
.about__grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: var(--space-10); align-items: center; }

.about__img-frame { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about__img-frame img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 6/7; }
.about__badge {
  position: absolute; bottom: var(--space-5); left: var(--space-5);
  display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  padding: 12px 18px; border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
.about__badge i { color: var(--color-primary); font-size: 1.3rem; }
.about__badge strong { display: block; font-family: var(--font-heading); font-size: 0.85rem; color: var(--color-dark); }
.about__badge span { font-size: 0.72rem; color: var(--text-secondary); }

.about__text { color: var(--text-secondary); margin-bottom: var(--space-6); font-size: var(--fs-lg); }

.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-8); }
.feature-card {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card i { font-size: 1.4rem; color: var(--color-primary); margin-bottom: var(--space-3); }
.feature-card h3 { font-size: var(--fs-base); margin-bottom: 6px; }
.feature-card p { font-size: var(--fs-sm); color: var(--text-secondary); }

/* ==========================================================================
   10. SERVICES
   ========================================================================== */
.services__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.service-card {
  position: relative;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.service-card::before {
  content: ''; position: absolute; inset: 0; opacity: 0;
  background: var(--gradient-primary);
  transition: opacity var(--transition-base);
  z-index: 0;
}
.service-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
.service-card:hover::before { opacity: 1; }
.service-card > * { position: relative; z-index: 1; }

.service-card__icon {
  width: 60px; height: 60px; display: grid; place-items: center;
  border-radius: var(--radius-md);
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-size: 1.5rem;
  margin-bottom: var(--space-5);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}
.service-card:hover .service-card__icon { background: rgba(255,255,255,0.2); color: #fff; transform: scale(1.1) rotate(-6deg); }
.service-card h3 { font-size: var(--fs-xl); margin-bottom: var(--space-3); transition: color var(--transition-base); }
.service-card:hover h3 { color: #fff; }
.service-card p { color: var(--text-secondary); font-size: var(--fs-sm); margin-bottom: var(--space-5); transition: color var(--transition-base); }
.service-card:hover p { color: rgba(255,255,255,0.85); }
.service-card__link { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-heading); font-size: var(--fs-sm); font-weight: 600; color: var(--color-primary); transition: color var(--transition-base), gap var(--transition-fast); }
.service-card:hover .service-card__link { color: #fff; }
.service-card__link:hover { gap: 12px; }

/* ==========================================================================
   11. SKILLS
   ========================================================================== */
.skills__grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--space-10); align-items: center; }
.skills__bars { display: flex; flex-direction: column; gap: var(--space-5); }
.skill-bar__label { display: flex; justify-content: space-between; font-family: var(--font-heading); font-size: var(--fs-sm); font-weight: 600; margin-bottom: 8px; }
.skill-bar__pct { color: var(--color-primary); }
.skill-bar__track { height: 10px; border-radius: var(--radius-full); background: var(--border-color); overflow: hidden; }
.skill-bar__fill {
  height: 100%; width: 0%;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  transition: width 1.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}
.skill-bar__fill::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 2.2s linear infinite;
}

/* ==========================================================================
   12. PORTFOLIO
   ========================================================================== */
.portfolio__filters { display: flex; justify-content: center; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-8); }
.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  font-family: var(--font-heading); font-weight: 600; font-size: var(--fs-sm);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  transition: all var(--transition-fast);
}
.filter-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }
.filter-btn.active { background: var(--gradient-primary); color: #fff; border-color: transparent; box-shadow: var(--shadow-glow); }

.portfolio__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.portfolio-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.portfolio-card.is-hidden { display: none; }
.portfolio-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }

.portfolio-card__media { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.portfolio-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.portfolio-card:hover .portfolio-card__media img { transform: scale(1.12); }
.portfolio-card__overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; gap: var(--space-4);
  background: linear-gradient(135deg, rgba(37,99,235,0.85), rgba(124,58,237,0.85));
  opacity: 0; transition: opacity var(--transition-base);
}
.portfolio-card:hover .portfolio-card__overlay { opacity: 1; }
.icon-btn {
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff; font-size: 1rem;
  transform: translateY(16px); opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-fast);
}
.portfolio-card:hover .icon-btn { transform: translateY(0); opacity: 1; }
.portfolio-card:hover .icon-btn:nth-child(2) { transition-delay: 0.08s; }
.icon-btn:hover { background: rgba(255,255,255,0.3); }

.portfolio-card__body { padding: var(--space-5); }
.portfolio-card__body h3 { font-size: var(--fs-lg); margin-bottom: 6px; }
.portfolio-card__body p { color: var(--text-secondary); font-size: var(--fs-sm); margin-bottom: var(--space-4); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 0.72rem; font-weight: 600; font-family: var(--font-heading); padding: 4px 12px; border-radius: var(--radius-full); background: rgba(var(--color-primary-rgb), 0.1); color: var(--color-primary); }

/* ==========================================================================
   13. TESTIMONIALS
   ========================================================================== */
.testimonial-slider { max-width: 760px; margin-inline: auto; overflow: hidden; }
.testimonial-track { display: flex; transition: transform var(--transition-slow); }
.testimonial-card {
  min-width: 100%;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  text-align: center;
  background: rgba(255,255,255,0.6);
  border: 1px solid rgba(255,255,255,0.5);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: var(--shadow-md);
}
.testimonial-card__stars { color: #FBBF24; font-size: 1rem; margin-bottom: var(--space-4); display: flex; justify-content: center; gap: 4px; }
.testimonial-card p { font-size: var(--fs-lg); color: var(--text-primary); margin-bottom: var(--space-6); font-style: italic; }
.testimonial-card__author { display: flex; align-items: center; justify-content: center; gap: 12px; }
.testimonial-card__author img { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; border: 2px solid var(--color-primary); }
.testimonial-card__author strong { display: block; font-family: var(--font-heading); font-size: var(--fs-sm); }
.testimonial-card__author span { font-size: var(--fs-xs); color: var(--text-secondary); }

.testimonial-controls { display: flex; align-items: center; justify-content: center; gap: var(--space-5); margin-top: var(--space-8); }
.testimonial-arrow {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border-color);
  display: grid; place-items: center;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.testimonial-arrow:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; }
.testimonial-dots { display: flex; gap: 8px; }
.testimonial-dots button { width: 9px; height: 9px; border-radius: 50%; background: var(--border-color); transition: all var(--transition-fast); }
.testimonial-dots button.active { background: var(--color-primary); width: 26px; border-radius: var(--radius-full); }

/* ==========================================================================
   14. CONTACT
   ========================================================================== */
.contact__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-10); }

.contact-list { margin-block: var(--space-8); display: flex; flex-direction: column; gap: var(--space-5); }
.contact-list li { display: flex; align-items: center; gap: var(--space-4); }
.contact-list__icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  display: grid; place-items: center;
  background: var(--gradient-primary); color: #fff; font-size: 1.1rem; flex-shrink: 0;
}
.contact-list strong { display: block; font-family: var(--font-heading); font-size: var(--fs-sm); margin-bottom: 2px; }
.contact-list a, .contact-list span { color: var(--text-secondary); font-size: var(--fs-sm); }
.contact-list a:hover { color: var(--color-primary); }

.social-icons { display: flex; gap: var(--space-3); }
.social-icons a {
  width: 42px; height: 42px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.social-icons a:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; transform: translateY(-4px); }

.contact-form { background: var(--bg-elevated); padding: var(--space-8); border-radius: var(--radius-lg); border: 1px solid var(--border-color); box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-group { margin-bottom: var(--space-5); }
.form-group label { display: block; font-family: var(--font-heading); font-size: var(--fs-sm); font-weight: 600; margin-bottom: 8px; }
.form-group .optional { font-weight: 400; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-color);
  background: var(--bg-body);
  font-size: var(--fs-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(var(--color-primary-rgb), 0.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group.has-error input, .form-group.has-error textarea { border-color: #EF4444; }
.form-error { display: block; color: #EF4444; font-size: var(--fs-xs); margin-top: 6px; min-height: 16px; }

.btn__spinner { display: none; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.4); border-top-color: #fff; border-radius: 50%; animation: spin 0.7s linear infinite; }
.contact-form.is-loading .btn__text { display: none; }
.contact-form.is-loading .btn__spinner { display: inline-block; }

.form-success { display: none; margin-top: var(--space-4); color: #16A34A; font-weight: 600; font-size: var(--fs-sm); align-items: center; gap: 8px; }
.form-success.is-visible { display: flex; animation: fade-in-up 0.5s ease; }

/* ==========================================================================
   15. FOOTER
   ========================================================================== */
.footer { background: var(--color-dark); color: rgba(255,255,255,0.72); }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: var(--space-8); padding-block: var(--space-12); }
.footer .logo__text { color: #fff; }
.footer__col--brand p { margin-block: var(--space-4) var(--space-5); font-size: var(--fs-sm); max-width: 320px; }
.footer__col--brand .social-icons a { border-color: rgba(255,255,255,0.15); color: #fff; }

.footer__col h3 { color: #fff; font-size: var(--fs-base); margin-bottom: var(--space-5); }
.footer__col ul { display: flex; flex-direction: column; gap: 12px; }
.footer__col ul a { font-size: var(--fs-sm); transition: color var(--transition-fast), padding-left var(--transition-fast); }
.footer__col ul a:hover { color: var(--color-accent); padding-left: 4px; }
.footer__col > p { font-size: var(--fs-sm); margin-bottom: var(--space-4); }

.newsletter-form { display: flex; border-radius: var(--radius-full); overflow: hidden; border: 1px solid rgba(255,255,255,0.18); }
.newsletter-form input { flex: 1; padding: 12px 18px; background: rgba(255,255,255,0.05); color: #fff; font-size: var(--fs-sm); }
.newsletter-form input::placeholder { color: rgba(255,255,255,0.4); }
.newsletter-form button { padding: 0 18px; background: var(--gradient-primary); color: #fff; }
.footer .form-error { margin-top: 8px; }
.footer .form-success { color: #4ADE80; }

.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); }
.footer__bottom-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); padding-block: var(--space-5); font-size: var(--fs-xs); color: rgba(255,255,255,0.5); }
.footer__bottom-inner .fa-heart { color: var(--color-accent); }

/* ==========================================================================
   16. BACK TO TOP
   ========================================================================== */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 900;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-primary); color: #fff;
  display: grid; place-items: center;
  box-shadow: var(--shadow-glow);
  opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ==========================================================================
   17. KEYFRAME ANIMATIONS
   ========================================================================== */
@keyframes float-blob { 0%, 100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-20px, 30px) scale(1.08); } }
@keyframes float-y { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes pulse-soft { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes scroll-dot { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 20px; } }
@keyframes loader-slide { 0% { transform: translateX(-100%); } 100% { transform: translateX(350%); } }
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
@keyframes ripple-anim { to { transform: scale(3); opacity: 0; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fade-in-up { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ==========================================================================
   18. SCROLL REVEAL (driven by IntersectionObserver in JS)
   ========================================================================== */
[data-reveal] { opacity: 0; transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1); transition-delay: var(--reveal-delay, 0ms); }
[data-reveal="fade-up"] { transform: translateY(40px); }
[data-reveal="fade-down"] { transform: translateY(-40px); }
[data-reveal="fade-left"] { transform: translateX(40px); }
[data-reveal="fade-right"] { transform: translateX(-40px); }
[data-reveal].is-visible { opacity: 1; transform: translate(0,0); }

/* ==========================================================================
   19. DARK MODE
   ========================================================================== */
body.dark-mode {
  --bg-body: var(--color-dark);
  --bg-alt: #131f38;
  --bg-elevated: #17233d;
  --bg-header: rgba(15, 23, 42, 0.75);
  --border-color: rgba(255, 255, 255, 0.09);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
}
body.dark-mode .theme-toggle .fa-moon { display: none; }
body.dark-mode .theme-toggle .fa-sun { display: block; color: #FBBF24; }
body.dark-mode .hero__grid { opacity: 0.5; }
body.dark-mode .about__badge { background: rgba(23, 35, 61, 0.9); }
body.dark-mode .about__badge strong { color: #fff; }
body.dark-mode .testimonial-card { background: rgba(23,35,61,0.55); border-color: rgba(255,255,255,0.08); }
body.dark-mode .loader { background: var(--color-dark); }

/* ==========================================================================
   20. MEDIA QUERIES
   ========================================================================== */

/* ≤1440px : tighten container slightly */
@media (max-width: 1440px) {
  :root { --container-w: 1140px; }
}

/* ≤1200px : shrink hero grid gap */
@media (max-width: 1200px) {
  .hero__inner { gap: var(--space-8); }
  .services__grid, .portfolio__grid { gap: var(--space-5); }
}

/* ≤992px : stack two-column sections, mobile nav */
@media (max-width: 992px) {
  :root { --header-h: 70px; }

  .nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--bg-body); padding: var(--space-8) var(--space-6);
    transform: translateX(100%); transition: transform var(--transition-base);
    overflow-y: auto; z-index: 999;
  }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; align-items: flex-start; gap: var(--space-6); }
  .nav__link { font-size: var(--fs-xl); }
  .header__cta { display: none; }
  .hamburger { display: flex; }

  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__subtitle { margin-inline: auto; }
  .hero__cta-group { justify-content: center; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .hero__visual { margin-top: var(--space-8); }
  .hero__float-wrap { max-width: 380px; }

  .about__grid, .skills__grid, .contact__grid { grid-template-columns: 1fr; }
  .about__media { max-width: 420px; margin-inline: auto; }

  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio__grid { grid-template-columns: repeat(2, 1fr); }

  .footer__grid { grid-template-columns: 1fr 1fr; }
}

/* ≤768px : single column cards, condensed spacing */
@media (max-width: 768px) {
  .section { padding-block: var(--space-10); }
  .services__grid { grid-template-columns: 1fr; }
  .portfolio__grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .contact-form { padding: var(--space-6); }
  .float-chip--1, .float-chip--2, .float-chip--3 { display: none; }
}

/* ≤576px : mobile tightening */
@media (max-width: 576px) {
  .container { padding-inline: var(--space-4); }
  .hero__title { font-size: 2rem; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .btn--lg { padding: 14px 24px; font-size: var(--fs-sm); }
  .testimonial-card { padding: var(--space-6) var(--space-5); }
  .footer__bottom-inner { flex-direction: column; text-align: center; }
}

/* ≤375px : smallest phones */
@media (max-width: 375px) {
  .hero__title { font-size: 1.7rem; }
  .logo__text { font-size: 1rem; }
  .stat-card { padding: var(--space-3); }
  .stat-card__num, .stat-card__plus { font-size: 1.3rem; }
}