/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:0.5rem;
  padding:0.75rem 1.75rem;border-radius:100px;
  font-weight:600;font-size:0.9rem;
  transition:all var(--transition-base);
  position:relative;overflow:hidden;
}
.btn::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,0.1),transparent);
  opacity:0;transition:opacity var(--transition-fast);
}
.btn:hover::after{opacity:1}
.btn--primary{
  background:var(--accent);color:#080810;
  box-shadow:0 4px 15px rgba(var(--accent-rgb),0.3);
}
.btn--primary:hover{
  box-shadow:0 6px 25px rgba(var(--accent-rgb),0.4);
  transform:translateY(-2px);
}
.btn--ghost{
  background:transparent;
  border:1px solid var(--border-glow);
  color:var(--text-primary);
}
.btn--ghost:hover{
  border-color:rgba(var(--accent-rgb),0.4);
  background:rgba(var(--accent-rgb),0.05);
}
.btn--sm{padding:0.5rem 1.25rem;font-size:0.8rem}
.btn__arrow{transition:transform var(--transition-fast)}
.btn:hover .btn__arrow{transform:translateX(4px)}
[dir="rtl"] .btn:hover .btn__arrow{transform:translateX(-4px)}

/* Project Cards */
.project-card{
  position:relative;border-radius:var(--radius-lg);
  background:var(--bg-glass);border:1px solid var(--border-subtle);
  backdrop-filter:blur(16px);overflow:hidden;
  transition:all var(--transition-base);
}
.project-card:hover{
  border-color:rgba(var(--accent-rgb),0.2);
  transform:translateY(-6px);
  box-shadow:0 20px 60px rgba(0,0,0,0.3);
}
.project-card__screen{
  aspect-ratio:16/10;background:var(--bg-tertiary);
  position:relative;overflow:hidden;
}
.project-card__screen-img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 0.6s var(--ease-out-expo);
}
.project-card:hover .project-card__screen-img{transform:scale(1.05)}
.project-card__badge{
  position:absolute;top:1rem;right:1rem;
  padding:0.3rem 0.75rem;border-radius:100px;
  font-size:0.7rem;font-weight:700;text-transform:uppercase;
  letter-spacing:0.05em;
}
.project-card__badge--live{background:rgba(105,240,174,0.15);color:#69f0ae}
.project-card__badge--soon{background:rgba(255,215,64,0.15);color:#ffd740}
.project-card__body{padding:1.5rem}
.project-card__title{font-size:1.05rem;margin-bottom:0.25rem}
.project-card__subtitle{font-size:0.8rem;color:var(--text-muted);margin-bottom:0.75rem}
.project-card__tech{
  display:flex;flex-wrap:wrap;gap:0.4rem;margin-bottom:1rem;
}
.project-card__tech-tag{
  padding:0.2rem 0.6rem;border-radius:100px;
  font-size:0.7rem;font-weight:500;
  background:rgba(var(--accent-rgb),0.08);
  color:rgba(var(--accent-rgb),0.8);
  border:1px solid rgba(var(--accent-rgb),0.1);
}
.project-card__problem,.project-card__goal{
  font-size:0.82rem;color:var(--text-secondary);line-height:1.6;margin-bottom:0.5rem;
}
.project-card__problem strong,.project-card__goal strong{color:var(--text-primary);font-weight:600}
.project-card__actions{display:flex;gap:0.75rem;margin-top:1rem;flex-wrap:wrap}
.project-card__link{
  display:inline-flex;align-items:center;gap:0.35rem;
  font-size:0.82rem;font-weight:600;color:var(--accent);
  transition:gap var(--transition-fast);
}
.project-card__link:hover{gap:0.6rem}

/* Featured Card (large) */
.project-card--featured{
  display:grid;grid-template-columns:1fr 1fr;
}
.project-card--featured .project-card__screen{aspect-ratio:auto;min-height:300px}
@media(max-width:768px){
  .project-card--featured{grid-template-columns:1fr}
  .project-card--featured .project-card__screen{aspect-ratio:16/10}
}

/* Navigation */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:1rem 2rem;
  display:flex;align-items:center;justify-content:space-between;
  transition:all var(--transition-base);
  background:rgba(8,8,16,0.4);backdrop-filter:blur(24px);
  border-bottom:1px solid rgba(0,212,255,0.15);
}
.nav.scrolled{
  background:rgba(8,8,16,0.85);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
  border-bottom:1px solid rgba(0,212,255,0.3);
}
[data-theme="light"] .nav.scrolled{background:rgba(240,240,248,0.85)}
.nav__logo{
  font-size:1.5rem;font-weight:800;color:var(--accent);
  letter-spacing:-0.05em;
}
.nav__links{
  display:flex;gap:0.25rem;
  padding:0.3rem;border-radius:100px;
  background:var(--bg-glass);border:1px solid var(--border-subtle);
  backdrop-filter:blur(12px);
}
.nav__link{
  position:relative;
  padding:0.45rem 1rem;border-radius:100px;
  font-size:0.8rem;font-weight:500;
  color:var(--text-secondary);
  transition:all var(--transition-fast);
  overflow:hidden;
}
.nav__link::after{
  content:'';position:absolute;bottom:0;left:50%;
  width:0;height:2px;background:var(--accent);
  transition:all var(--transition-fast);
  transform:translateX(-50%);
}
.nav__link:hover::after, .nav__link.active::after{
  width:80%;
}
.nav__link:hover,.nav__link.active{
  color:var(--accent);background:rgba(var(--accent-rgb),0.08);
  text-shadow: 0 0 8px rgba(var(--accent-rgb),0.3);
}
.nav__controls{display:flex;align-items:center;gap:0.5rem}
.nav__btn{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-glass);border:1px solid var(--border-subtle);
  backdrop-filter:blur(12px);
  color:var(--text-secondary);font-size:1rem;
  transition:all var(--transition-fast);
}
.nav__btn:hover{color:var(--accent);border-color:rgba(var(--accent-rgb),0.3)}
.nav__menu-btn{display:none;position:relative;}
.nav__menu-btn span{
  position:absolute;width:20px;height:2px;background:currentColor;
  transition:all 0.3s ease;
}
.nav__menu-btn span:nth-child(1){transform:translateY(-6px)}
.nav__menu-btn span:nth-child(2){transform:translateY(0)}
.nav__menu-btn span:nth-child(3){transform:translateY(6px)}
.nav__menu-btn.menu-open span:nth-child(1){transform:translateY(0) rotate(45deg)}
.nav__menu-btn.menu-open span:nth-child(2){opacity:0}
.nav__menu-btn.menu-open span:nth-child(3){transform:translateY(0) rotate(-45deg)}
@media(max-width:768px){
  .nav__links{display:none}
  .nav__menu-btn{display:flex}
}

/* Mobile Sidebar */
.sidebar{
  position:fixed;top:0;right:0;bottom:0;
  width:min(320px,85vw);z-index:2000;
  background:rgba(8,8,16,0.85);backdrop-filter:blur(40px);
  border-left:1px solid rgba(0,212,255,0.15);
  box-shadow: -10px 0 30px rgba(0,0,0,0.5);
  padding:5rem 2rem 2rem;
  transform:translateX(100%);
  transition:transform 0.6s cubic-bezier(.16,1,.3,1);
  display:flex;flex-direction:column;
}
[data-theme="light"] .sidebar{background:rgba(240,240,248,0.85)}
.sidebar.open{transform:translateX(0)}
[dir="rtl"] .sidebar{right:auto;left:0;border-left:none;border-right:1px solid rgba(0,212,255,0.15);transform:translateX(-100%);box-shadow: 10px 0 30px rgba(0,0,0,0.5);}
[dir="rtl"] .sidebar.open{transform:translateX(0)}
.sidebar__overlay{
  position:fixed;inset:0;z-index:1999;
  background:rgba(0,0,0,0.5);backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;
  transition:opacity 0.4s ease;
}
.sidebar__overlay.visible{opacity:1;pointer-events:all}
.sidebar__close{
  position:absolute;top:1.5rem;right:1.5rem;
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-glass);border:1px solid var(--border-subtle);
  color:var(--text-secondary);font-size:1.2rem;
  transition:all 0.4s ease;
}
[dir="rtl"] .sidebar__close{right:auto;left:1.5rem}
.sidebar__close:hover{color:var(--accent);border-color:var(--accent);transform:rotate(90deg)}
.sidebar__links{display:flex;flex-direction:column;gap:0.25rem;flex:1}
.sidebar__link{
  padding:1rem;border-radius:var(--radius-md);
  font-size:1.1rem;font-weight:500;
  color:var(--text-secondary);
  transition:all var(--transition-fast);
  display:flex;align-items:center;gap:0.75rem;
  opacity:0;transform:translateX(20px);
}
.sidebar.open .sidebar__link{
  opacity:1;transform:translateX(0);
}
.sidebar.open .sidebar__link:nth-child(1){transition-delay:0.1s}
.sidebar.open .sidebar__link:nth-child(2){transition-delay:0.15s}
.sidebar.open .sidebar__link:nth-child(3){transition-delay:0.2s}
.sidebar.open .sidebar__link:nth-child(4){transition-delay:0.25s}
.sidebar.open .sidebar__link:nth-child(5){transition-delay:0.3s}
.sidebar.open .sidebar__link:nth-child(6){transition-delay:0.35s}
.sidebar.open .sidebar__link:nth-child(7){transition-delay:0.4s}
.sidebar.open .sidebar__link:nth-child(8){transition-delay:0.45s}
.sidebar__link:hover,.sidebar__link.active{
  color:var(--accent);background:rgba(var(--accent-rgb),0.06);
  border-left:3px solid var(--accent);
}
[dir="rtl"] .sidebar__link:hover,[dir="rtl"] .sidebar__link.active{
  border-left:none;border-right:3px solid var(--accent);
}
.sidebar__link-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--border-subtle);
  transition:background var(--transition-fast);
}
.sidebar__link.active .sidebar__link-dot{background:var(--accent);box-shadow:0 0 8px rgba(var(--accent-rgb),0.5)}
.sidebar__footer{
  padding-top:1.5rem;border-top:1px solid var(--border-subtle);
  display:flex;gap:0.75rem;
}

/* Media Modal */
.media-modal{
  position:fixed;inset:0;z-index:3000;
  background:rgba(0,0,0,0.9);backdrop-filter:blur(20px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;
  transition:opacity 0.4s ease;
}
.media-modal.open{opacity:1;pointer-events:all}
.media-modal__content{
  max-width:90vw;max-height:85vh;
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
}
.media-modal__content img{max-width:90vw;max-height:85vh;object-fit:contain}
.media-modal__content iframe{width:80vw;height:80vh;border:none;border-radius:var(--radius-md)}
.media-modal__close{
  position:absolute;top:1.5rem;right:1.5rem;z-index:3001;
  width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,0.1);backdrop-filter:blur(10px);
  color:#fff;font-size:1.3rem;
  display:flex;align-items:center;justify-content:center;
  transition:all var(--transition-fast);
}
.media-modal__close:hover{background:rgba(255,255,255,0.2);transform:scale(1.1)}
.media-modal__controls{
  position:absolute;bottom:1.5rem;left:50%;transform:translateX(-50%);
  display:flex;gap:0.5rem;padding:0.5rem;border-radius:100px;
  background:rgba(0,0,0,0.5);backdrop-filter:blur(10px);
}
.media-modal__ctrl-btn{
  width:36px;height:36px;border-radius:50%;
  background:rgba(255,255,255,0.1);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:0.9rem;transition:all var(--transition-fast);
}
.media-modal__ctrl-btn:hover{background:rgba(255,255,255,0.2)}

/* Project filter tabs */
.filter-tabs{
  display:flex;gap:0.5rem;flex-wrap:wrap;margin-bottom:2rem;
}
.filter-tab{
  padding:0.5rem 1.25rem;border-radius:100px;
  font-size:0.82rem;font-weight:500;
  background:var(--bg-glass);border:1px solid var(--border-subtle);
  color:var(--text-secondary);transition:all var(--transition-fast);
  backdrop-filter:blur(8px);
}
.filter-tab.active,.filter-tab:hover{
  background:rgba(var(--accent-rgb),0.1);
  border-color:rgba(var(--accent-rgb),0.3);color:var(--accent);
}

/* Placeholder image */
.placeholder-img{
  width:100%;height:100%;
  background:linear-gradient(135deg,var(--bg-tertiary),var(--bg-secondary));
  display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);font-size:2rem;
}