/* ============================================================
   הבלוג של ירין — עיצוב מלא
   ============================================================ */

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

:root {
  --bg:        #FFFBF0;
  --bg-alt:    #FFF3D6;
  --primary:   #FF6B35;
  --primary-d: #E05520;
  --secondary: #E91E8C;
  --accent:    #00BCD4;
  --purple:    #8B5CF6;
  --text:      #1A1A2E;
  --muted:     #6B7280;
  --white:     #FFFFFF;
  --border:    #F0E6CC;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.16);
  --shadow-ho: 0 12px 48px rgba(255,107,53,.25);
  --r-sm: 8px; --r-md: 16px; --r-lg: 24px; --r-xl: 32px; --r-full: 9999px;
  --trans: .25s ease;
  --bounce: .35s cubic-bezier(.34,1.56,.64,1);
}

html { direction: rtl; scroll-behavior: smooth; }

body {
  font-family: 'Rubik', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1rem;
  min-height: 100vh;
  text-align: right;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ============================================================
   אנימציות
   ============================================================ */

@keyframes bounce-in {
  0%   { transform: scale(.8) translateY(20px); opacity: 0; }
  70%  { transform: scale(1.05) translateY(-4px); opacity: 1; }
  100% { transform: scale(1) translateY(0); }
}
@keyframes float {
  0%,100% { transform: translateY(0) rotate(-2deg); }
  50%      { transform: translateY(-10px) rotate(2deg); }
}
@keyframes wiggle {
  0%,100% { transform: rotate(-3deg); }
  50%      { transform: rotate(3deg); }
}
@keyframes pulse-ring {
  0%  { box-shadow: 0 0 0 0 rgba(255,107,53,.5); }
  70% { box-shadow: 0 0 0 15px rgba(255,107,53,0); }
  100%{ box-shadow: 0 0 0 0 rgba(255,107,53,0); }
}
@keyframes slide-up {
  from { transform: translateY(28px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* ============================================================
   ניווט
   ============================================================ */

.nav {
  background: rgba(255,251,240,.93);
  backdrop-filter: blur(12px);
  border-bottom: 3px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 10px 0;
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: transform var(--bounce);
}
.nav__logo:hover { transform: scale(1.06) rotate(-1deg); }
.nav__logo-emoji {
  font-size: 1.75rem;
  display: inline-block;
  animation: wiggle 3s infinite;
}
.nav__logo-text {
  font-size: 1.25rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav__links { display: flex; align-items: center; gap: 10px; }
.nav__link {
  font-size: .875rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--r-full);
  border: 2px solid transparent;
  transition: all var(--trans);
  color: var(--text);
  cursor: pointer;
  background: none;
}
.nav__link:hover, .nav__link.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   הירו
   ============================================================ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 64px;
  background: linear-gradient(160deg, #fff9e6 0%, #fff0f5 40%, #f0f8ff 100%);
  text-align: center;
  border-bottom: 4px dashed var(--border);
}
.hero__bubble {
  position: absolute; border-radius: 50%; opacity: .18; pointer-events: none;
}
.hero__bubble--1 {
  width:400px; height:400px; background: var(--primary);
  top:-120px; right:-100px; animation: float 7s ease-in-out infinite;
}
.hero__bubble--2 {
  width:300px; height:300px; background: var(--secondary);
  bottom:-100px; left:-80px; animation: float 9s ease-in-out infinite reverse;
}
.hero__bubble--3 {
  width:180px; height:180px; background: var(--accent);
  top:50%; left:30%; animation: float 5s ease-in-out infinite;
}
.hero__content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
}
.hero__badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  font-size: .875rem; font-weight: 700;
  padding: 6px 20px; border-radius: var(--r-full);
  box-shadow: var(--shadow-sm);
  animation: bounce-in .6s ease both;
}
.hero__title {
  font-size: clamp(2.25rem, 7vw, 3.75rem);
  font-weight: 900; line-height: 1.15;
  animation: bounce-in .7s ease .1s both;
}
.hero__title-line { display: block; }
.hero__title-accent {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.1em;
}
.hero__title-emoji {
  display: inline-block; font-size: .7em;
  animation: wiggle 2s infinite; vertical-align: middle; margin-right: 8px;
  -webkit-text-fill-color: initial;
}
.hero__title-sub {
  display: block; font-size: .4em; font-weight: 500;
  color: var(--muted); margin-top: 4px;
  -webkit-text-fill-color: initial;
}
.hero__subtitle {
  font-size: 1.125rem; color: var(--muted);
  max-width: 640px; line-height: 1.8;
  animation: bounce-in .7s ease .2s both;
}
.hero__subtitle strong { color: var(--text); }
.hero__stats {
  display: flex; gap: 32px; flex-wrap: wrap; justify-content: center;
  animation: bounce-in .7s ease .3s both;
}
.hero__stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.hero__stat-number {
  font-size: 2.25rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__stat-label {
  font-size: .875rem; font-weight: 600; color: var(--muted);
  text-align: center; max-width: 100px;
}
.hero__cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  font-size: 1.125rem; font-weight: 900;
  padding: 16px 40px; border-radius: var(--r-full);
  box-shadow: var(--shadow-md);
  transition: all var(--bounce);
  cursor: pointer;
  animation: bounce-in .7s ease .4s both, pulse-ring 2s 1.5s infinite;
  border: none;
}
.hero__cta:hover { transform: translateY(-4px) scale(1.05); box-shadow: var(--shadow-ho); }
.hero__cta-arrow { font-size: 1.2em; animation: float 1.5s ease-in-out infinite; display: inline-block; }

/* ============================================================
   פוסטים – סקשן ופילטרים
   ============================================================ */

.posts-section { padding: 48px 0 64px; }
.posts-section__header { text-align: center; margin-bottom: 32px; }
.posts-section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 900; color: var(--text);
  display: flex; align-items: baseline;
  justify-content: center; gap: 12px; flex-wrap: wrap;
}
.posts-section__count { font-size: 1.25rem; font-weight: 700; color: var(--muted); }
.posts-section__subtitle { font-size: 1rem; color: var(--muted); margin-top: 8px; }

.filter-bar {
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: center; margin-bottom: 40px;
}
.filter-btn {
  font-size: .875rem; font-weight: 700;
  padding: 8px 20px; border-radius: var(--r-full);
  border: 2px solid var(--border); background: var(--white);
  color: var(--muted); cursor: pointer; transition: all var(--bounce);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.filter-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white) !important; border-color: transparent !important;
  box-shadow: var(--shadow-sm); transform: translateY(-2px);
}

/* ============================================================
   גריד
   ============================================================ */

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px; align-items: start;
}
.posts-grid__item { animation: slide-up .5s ease both; }

/* ============================================================
   כרטיס פוסט
   ============================================================ */

.post-card {
  background: var(--white); border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm); overflow: hidden;
  display: flex; flex-direction: column;
  transition: all var(--bounce);
  border: 2px solid transparent;
}
.post-card:hover { transform: translateY(-8px) rotate(.3deg); box-shadow: var(--shadow-ho); }
.post-card--travel:hover   { border-color: var(--primary); }
.post-card--food:hover     { border-color: var(--secondary); }
.post-card--business:hover { border-color: var(--purple); }

.post-card__image-wrap {
  position: relative; overflow: hidden; aspect-ratio: 16/10; cursor: pointer;
}
.post-card__image {
  width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease;
}
.post-card:hover .post-card__image { transform: scale(1.08); }
.post-card__image-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,.3) 100%);
  opacity: 0; transition: opacity var(--trans);
}
.post-card:hover .post-card__image-overlay { opacity: 1; }

.post-card__body {
  padding: 20px 24px 24px;
  display: flex; flex-direction: column; gap: 12px; flex: 1;
}
.post-card__category {
  font-size: .875rem; font-weight: 700;
  padding: 3px 12px; border-radius: var(--r-full); display: inline-block;
}
.cat--travel   { background: #FFE8DC; color: var(--primary); }
.cat--food     { background: #FFE0F0; color: var(--secondary); }
.cat--business { background: #EDE9FE; color: var(--purple); }

.post-card__title {
  font-size: 1.125rem; font-weight: 900; line-height: 1.3;
  cursor: pointer; transition: color var(--trans);
}
.post-card--travel .post-card__title:hover   { color: var(--primary); }
.post-card--food .post-card__title:hover     { color: var(--secondary); }
.post-card--business .post-card__title:hover { color: var(--purple); }

.post-card__author {
  font-size: .8rem; color: var(--purple); font-weight: 600; font-style: italic;
  margin-bottom: 4px;
}
.post-card__teaser {
  font-size: .875rem; color: var(--muted); line-height: 1.7; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3;
  -webkit-box-orient: vertical; overflow: hidden;
}
.post-card__btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .875rem; font-weight: 800;
  padding: 8px 20px; border-radius: var(--r-full);
  transition: all var(--bounce);
  align-self: flex-start; margin-top: 8px; cursor: pointer; border: none;
}
.btn--travel   { background: #FFE8DC; color: var(--primary); }
.btn--food     { background: #FFE0F0; color: var(--secondary); }
.btn--business { background: #EDE9FE; color: var(--purple); }
.post-card__btn:hover { transform: translateX(-4px); }
.post-card--travel .post-card__btn:hover   { background: var(--primary);   color: #fff; }
.post-card--food .post-card__btn:hover     { background: var(--secondary); color: #fff; }
.post-card--business .post-card__btn:hover { background: var(--purple);    color: #fff; }
.post-card__btn-arrow { transition: transform var(--trans); }
.post-card__btn:hover .post-card__btn-arrow { transform: translateX(-4px); }

/* ============================================================
   דף פוסט
   ============================================================ */

.post-header {
  padding: 40px 0 32px; text-align: right;
  position: relative; overflow: hidden;
}
.post-header--travel   { background: linear-gradient(135deg,#fff6f0,#fff0f5); }
.post-header--food     { background: linear-gradient(135deg,#fff0f5,#fdf0ff); }
.post-header--business { background: linear-gradient(135deg,#f5f0ff,#f0f5ff); }
.post-header::after {
  content: ''; position: absolute; bottom: 0; right: 0; left: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}
.post-back-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .875rem; font-weight: 700;
  color: var(--muted); cursor: pointer;
  padding: 6px 16px; border-radius: var(--r-full);
  border: 2px solid var(--border); background: rgba(255,255,255,.7);
  transition: all var(--trans); margin-bottom: 24px;
}
.post-back-btn:hover {
  background: var(--primary); color: white;
  border-color: var(--primary); transform: translateX(4px);
}
.post-header__category {
  display: inline-block; font-size: .875rem; font-weight: 700;
  padding: 4px 16px; border-radius: var(--r-full); margin-bottom: 16px;
}
.post-header__author {
  display: inline-block; font-size: .95rem; font-weight: 600; font-style: italic;
  color: rgba(255,255,255,.85); margin-right: 12px;
}
.post-header__title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 900; line-height: 1.2; margin-bottom: 16px; max-width: 800px;
}
.post-header__teaser {
  font-size: 1.125rem; color: var(--muted); max-width: 680px; line-height: 1.7; font-weight: 500;
}

.post-featured-img {
  padding: 32px 0;
}
.post-featured-img figure {
  margin: 0; border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-lg);
}
.post-featured-img img {
  width: 100%; max-height: 520px; object-fit: cover;
}
.post-featured-img figcaption {
  background: rgba(0,0,0,.65); color: rgba(255,255,255,.85);
  font-size: .875rem; padding: 10px 20px; text-align: center;
}

.post-content { padding: 32px 0 48px; }
.post-content__body {
  max-width: 760px; display: flex; flex-direction: column; gap: 20px;
}
.post-content__para {
  font-size: 1.125rem; line-height: 1.9; color: var(--text);
  background: var(--white); border-radius: var(--r-md);
  padding: 20px 24px; box-shadow: var(--shadow-sm);
  border-right: 4px solid transparent; transition: border-color var(--trans);
}
.post-content__para:hover { border-right-color: var(--primary); }
.post-content__para:nth-child(even) { background: var(--bg-alt); }

.post-nav {
  margin-top: 48px; padding-top: 32px;
  border-top: 3px dashed var(--border);
  display: flex; align-items: center; justify-content: center;
}
.post-nav__btn {
  display: inline-flex; align-items: center; gap: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white; font-size: 1rem; font-weight: 800;
  padding: 16px 32px; border-radius: var(--r-full);
  box-shadow: var(--shadow-md); transition: all var(--bounce);
  cursor: pointer; border: none;
}
.post-nav__btn:hover { transform: translateY(-3px) scale(1.05); box-shadow: var(--shadow-ho); }

/* ============================================================
   גלריה
   ============================================================ */

.gallery { margin-top: 40px; }
.gallery__title { font-size: 1.5rem; font-weight: 900; margin-bottom: 20px; }
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
  gap: 16px;
}
.gallery__item {
  position: relative; border-radius: var(--r-md); overflow: hidden;
  aspect-ratio: 4/3; cursor: pointer; border: none; padding: 0;
  background: #f0e6cc; transition: transform var(--bounce);
}
.gallery__item:hover { transform: scale(1.03); }
.gallery__img { width:100%; height:100%; object-fit:cover; transition: transform .4s ease; }
.gallery__item:hover .gallery__img { transform: scale(1.06); }
.gallery__overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.35);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity var(--trans); font-size: 2rem;
}
.gallery__item:hover .gallery__overlay { opacity: 1; }

/* לייטבוקס */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.88);
  z-index: 1000; display: none;
  align-items: center; justify-content: center; padding: 20px;
}
.lightbox.open { display: flex; animation: bounce-in .25s ease both; }
.lightbox__close {
  position: fixed; top: 20px; left: 20px;
  background: rgba(255,255,255,.15); color: white;
  border: none; border-radius: 50%; width: 44px; height: 44px;
  font-size: 1.2rem; cursor: pointer; display: flex;
  align-items: center; justify-content: center; transition: background var(--trans);
  z-index: 1001;
}
.lightbox__close:hover { background: rgba(255,255,255,.3); }
.lightbox__content {
  max-width: 900px; width: 100%; display: flex;
  flex-direction: column; align-items: center; gap: 16px;
}
.lightbox__img {
  max-height: 70vh; width: auto; max-width: 100%;
  border-radius: var(--r-md); box-shadow: var(--shadow-lg);
}
.lightbox__caption { color: rgba(255,255,255,.85); font-size: .875rem; text-align: center; }
.lightbox__nav {
  display: flex; align-items: center; gap: 24px;
}
.lightbox__btn {
  background: rgba(255,255,255,.15); color: white; border: none;
  border-radius: var(--r-full); width: 44px; height: 44px; font-size: 1.2rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background var(--trans);
}
.lightbox__btn:hover { background: rgba(255,255,255,.3); }
.lightbox__counter { color: rgba(255,255,255,.7); font-size: .875rem; font-weight: 600; min-width: 60px; text-align: center; }

/* ============================================================
   פוסטים קשורים
   ============================================================ */

.related-posts {
  background: var(--bg-alt); padding: 48px 0;
  border-top: 3px dashed var(--border);
}
.related-posts__title { font-size: 1.875rem; font-weight: 900; margin-bottom: 32px; }
.related-posts__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 20px;
}
.related-card {
  display: flex; flex-direction: column; background: var(--white);
  border-radius: var(--r-md); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: all var(--bounce);
  border: 2px solid transparent; cursor: pointer;
}
.related-card:hover { transform: translateY(-6px); }
.related-card--travel:hover   { border-color: var(--primary); }
.related-card--food:hover     { border-color: var(--secondary); }
.related-card--business:hover { border-color: var(--purple); }
.related-card__img-wrap { aspect-ratio: 16/9; overflow: hidden; }
.related-card__img { width:100%; height:100%; object-fit:cover; transition: transform .4s ease; }
.related-card:hover .related-card__img { transform: scale(1.07); }
.related-card__body { padding: 16px 20px; display: flex; flex-direction: column; gap: 8px; }
.related-card__category { font-size: .75rem; font-weight: 700; color: var(--muted); }
.related-card__title {
  font-size: 1rem; font-weight: 800; line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ============================================================
   פוטר
   ============================================================ */

.footer {
  background: linear-gradient(135deg, var(--text) 0%, #2d1b4e 100%);
  color: rgba(255,255,255,.85); padding: 40px 0; margin-top: 64px; text-align: center;
}
.footer__inner {
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.footer__logo { display: flex; align-items: center; gap: 8px; }
.footer__emoji { font-size: 2rem; animation: wiggle 3s infinite; display: inline-block; }
.footer__brand {
  font-size: 1.25rem; font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.footer__tagline { font-size: .875rem; opacity: .7; max-width: 360px; }
.footer__copy   { font-size: .875rem; opacity: .5; }
.footer__hearts { font-size: 1.5rem; letter-spacing: 8px; opacity: .7; }
.footer__dz {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 16px; padding: 8px 20px; border-radius: var(--r-full);
  background: rgba(255,255,255,.9); color: #333; text-decoration: none;
  font-size: .9rem; font-weight: 600; transition: var(--trans);
}
.footer__dz:hover { background: rgba(255,255,255,.2); }
.footer__dz-logo { height: 28px; }

/* ============================================================
   ריספונסיב
   ============================================================ */

/* Tablet — 2 עמודות */
@media (max-width: 900px) {
  .hero { padding: 56px 0 44px; }
  .post-content__para { font-size: 1rem; padding: 16px 18px; }
}

/* Mobile — עמודה אחת */
@media (max-width: 600px) {
  .posts-grid { grid-template-columns: 1fr; gap: 20px; }
  .related-posts__grid { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 36px; }
  .hero__stats { gap: 16px; }
  .hero__stat-number { font-size: 2rem; }
  .hero__stat-label { font-size: .75rem; }
  .post-header { padding: 28px 0 24px; }
  .post-header__teaser { font-size: 1rem; }
  .post-content__para { font-size: 1rem; padding: 14px 16px; }
  .gallery__grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
  .sci-calc__buttons { grid-template-columns: repeat(4, 1fr); }
}

/* ---- כפתור מחשבון מדעי ---- */
.sci-calc-toggle-wrap {
  display: flex; justify-content: center; padding: 16px 0;
  background: var(--bg);
}
.sci-calc-toggle {
  font-size: 1.6rem; width: 52px; height: 52px; border-radius: 50%;
  border: 2px solid var(--border); background: var(--white);
  cursor: pointer; transition: var(--bounce);
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
}
.sci-calc-toggle:hover {
  transform: scale(1.15) rotate(10deg);
  box-shadow: var(--shadow-md); border-color: var(--accent);
}

/* ---- קונפטי ---- */
.confetti-container {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; overflow: hidden; z-index: 10;
}
.confetti-piece {
  position: absolute; top: -20px;
  animation: confetti-fall linear forwards;
  opacity: 0.9;
}
@keyframes confetti-fall {
  0% { transform: translateY(0) rotate(0deg) scale(1); opacity: 1; }
  50% { opacity: 1; }
  100% { transform: translateY(calc(100vh)) rotate(720deg) scale(0.3); opacity: 0; }
}

/* ---- מחשבון מדעי ---- */
.sci-calc {
  position: relative;
  padding: 48px 0; text-align: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  transition: max-height .5s ease, opacity .4s ease, padding .4s ease;
  overflow: hidden;
}
.sci-calc--hidden {
  max-height: 0; opacity: 0; padding: 0; pointer-events: none;
}
.sci-calc__title {
  font-size: 2rem; font-weight: 900; color: #00d4aa; margin-bottom: 8px;
}
.sci-calc__subtitle {
  font-size: 1rem; color: rgba(255,255,255,.7); margin-bottom: 24px;
}
.sci-calc__box {
  max-width: 420px; margin: 0 auto;
  background: #0a0a1a; border-radius: var(--r-lg); padding: 20px;
  box-shadow: 0 8px 32px rgba(0,212,170,.2), inset 0 1px 0 rgba(255,255,255,.05);
}
.sci-calc__display {
  background: #0d1117; color: #00ff88; font-size: 1.75rem; font-weight: 700;
  font-family: 'Courier New', monospace; text-align: left; direction: ltr;
  padding: 16px 20px; border-radius: var(--r-md); margin-bottom: 16px;
  min-height: 60px; display: flex; align-items: center;
  border: 1px solid rgba(0,212,170,.3); word-break: break-all;
  overflow-x: auto;
}
.sci-calc__buttons {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
}
.sci-calc__btn {
  padding: 14px 8px; font-size: 1.1rem; font-weight: 700;
  border-radius: var(--r-sm); border: 1px solid rgba(255,255,255,.1);
  background: #1a1a2e; color: #fff; cursor: pointer;
  transition: var(--trans);
}
.sci-calc__btn:hover { background: #2a2a4e; transform: scale(1.05); }
.sci-calc__btn--op {
  background: #e91e8c; color: #fff;
}
.sci-calc__btn--op:hover { background: #ff3da5; }
.sci-calc__btn--func {
  background: #16213e; color: #00d4aa; font-size: .9rem;
}
.sci-calc__btn--func:hover { background: #1a3a5c; }
.sci-calc__btn--clear {
  background: #ff4444; color: #fff;
}
.sci-calc__btn--clear:hover { background: #ff6666; }
.sci-calc__btn--eq {
  background: linear-gradient(135deg, #00d4aa, #00bcd4); color: #0a0a1a; font-size: 1.3rem;
}
.sci-calc__btn--eq:hover { background: linear-gradient(135deg, #00ffcc, #00ddf0); }

/* Small mobile */
@media (max-width: 480px) {
  .nav__logo-text { font-size: 1rem; }
  .nav__link { font-size: .75rem; padding: 4px 10px; }
  .hero__cta { font-size: 1rem; padding: 12px 24px; }
  .filter-btn { font-size: .8rem; padding: 6px 14px; }
  .post-card__title { font-size: 1rem; }
}