/* ==========================================================
   ELSAYED KOWEIDAH — DATA ENGINEERING PORTFOLIO
   Theme: deep-space "data pipeline" aesthetic
   ========================================================== */

:root{
  --bg-1:#060b14;
  --bg-2:#0b1826;
  --accent-1:#00f5d4;   /* teal - data/streams */
  --accent-2:#7b2ff7;   /* violet - ai/ml */
  --accent-3:#3a7bd5;   /* blue - cloud/sql */
  --text-1:#eaf6ff;
  --text-2:#9fb4c7;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.14);
  --radius: 20px;
  --ease: cubic-bezier(.16,1,.3,1);
}

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

html{ scroll-behavior:smooth; }

body{
  font-family:'Poppins', sans-serif;
  background:var(--bg-1);
  color:var(--text-1);
  overflow-x:hidden;
  cursor:none;
}

a{ text-decoration:none; color:inherit; }
ul{ list-style:none; }
img{ max-width:100%; display:block; }

::selection{ background:var(--accent-2); color:#fff; }

/* ---------------- custom cursor ---------------- */
.cursor-dot, .cursor-ring{
  position:fixed; top:0; left:0; pointer-events:none; z-index:9999;
  border-radius:50%; transform:translate(-50%,-50%);
}
.cursor-dot{ width:6px; height:6px; background:var(--accent-1); }
.cursor-ring{
  width:34px; height:34px; border:1px solid var(--accent-1);
  opacity:.6; transition:width .25s var(--ease), height .25s var(--ease), opacity .25s;
}
.cursor-ring.grow{ width:60px; height:60px; opacity:1; background:rgba(0,245,212,0.08); }
@media (hover:none), (pointer:coarse){
  .cursor-dot, .cursor-ring{ display:none; }
  body{ cursor:auto; }
}

/* ---------------- loader ---------------- */
.loader{
  position:fixed; inset:0; background:var(--bg-1); z-index:10000;
  display:flex; align-items:center; justify-content:center;
  transition:opacity .6s var(--ease), visibility .6s;
}
.loader.hidden{ opacity:0; visibility:hidden; }
.loader-inner{ text-align:center; font-family:'Space Mono', monospace; }
.loader-bracket{ color:var(--accent-1); font-size:2rem; }
.loader-text{ color:var(--text-1); font-size:1.1rem; letter-spacing:2px; margin:0 8px; }
.loader-bar{ width:220px; height:3px; background:rgba(255,255,255,0.1); margin:18px auto 0; border-radius:4px; overflow:hidden; }
.loader-fill{ height:100%; width:0%; background:linear-gradient(90deg,var(--accent-1),var(--accent-2)); animation:loadfill 1.4s var(--ease) forwards; }
@keyframes loadfill{ to{ width:100%; } }

/* ---------------- background canvas / grid ---------------- */
#bg-canvas{ position:fixed; inset:0; z-index:0; }
.grid-overlay{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, rgba(0,0,0,0.9), transparent 75%);
}

/* ---------------- side nav ---------------- */
.side-nav{
  position:fixed; right:28px; top:50%; transform:translateY(-50%);
  z-index:500; display:flex;
}
.side-nav ul{ display:flex; flex-direction:column; gap:16px; }
.nav-dot{
  position:relative; width:10px; height:10px; border-radius:50%;
  background:rgba(255,255,255,0.25); display:block; transition:all .3s var(--ease);
}
.nav-dot.active, .nav-dot:hover{ background:var(--accent-1); box-shadow:0 0 12px var(--accent-1); transform:scale(1.3); }
.nav-dot::after{
  content:attr(data-label); position:absolute; right:22px; top:50%; transform:translateY(-50%);
  font-size:.7rem; letter-spacing:1px; color:var(--text-2); white-space:nowrap;
  opacity:0; transition:opacity .25s; text-transform:uppercase;
}
.nav-dot:hover::after{ opacity:1; }
@media (max-width:900px){ .side-nav{ display:none; } }

/* ---------------- generic layout ---------------- */
.section{
  position:relative; z-index:1; width:100%;
  padding:140px 8vw 100px;
}
.section-heading{ margin-bottom:60px; max-width:640px; }
.tag{
  display:inline-block; font-family:'Space Mono', monospace; font-size:.75rem;
  letter-spacing:2px; color:var(--accent-1); text-transform:uppercase;
  padding:6px 14px; border:1px solid rgba(0,245,212,0.35); border-radius:30px;
  margin-bottom:18px; background:rgba(0,245,212,0.06);
}
.section-heading h2{ font-size:clamp(2rem, 4vw, 3rem); font-weight:700; line-height:1.15; }
.section-sub{ color:var(--text-2); margin-top:12px; font-size:1.05rem; }

.glow-text{
  background:linear-gradient(90deg,var(--accent-1),var(--accent-3),var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  filter:drop-shadow(0 0 18px rgba(0,245,212,0.25));
}

/* reveal animation base state */
[data-reveal]{ opacity:0; transform:translateY(40px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
[data-reveal].in-view{ opacity:1; transform:translateY(0); }

/* buttons */
.btn{
  display:inline-flex; align-items:center; gap:10px; padding:15px 28px;
  border-radius:50px; font-weight:600; font-size:.95rem; transition:all .35s var(--ease);
  position:relative; overflow:hidden; white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent-1),var(--accent-3));
  color:#04141c; box-shadow:0 10px 30px -10px rgba(0,245,212,0.55);
}
.btn-primary:hover{ transform:translateY(-3px) scale(1.02); box-shadow:0 16px 34px -8px rgba(0,245,212,0.65); }
.btn-ghost{
  background:var(--glass); border:1px solid var(--glass-border); color:var(--text-1);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{ background:rgba(255,255,255,0.12); transform:translateY(-3px); }
.btn-sm{ padding:10px 20px; font-size:.85rem; margin-top:14px; }
.btn-lg{ padding:19px 38px; font-size:1.05rem; }
.arrow{ display:inline-block; transition:transform .3s var(--ease); }
.btn:hover .arrow{ transform:translateX(4px); }

/* ==========================================================
   HERO
   ========================================================== */
.hero{
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  padding-top:0; overflow:hidden;
}
.hero-blob{
  position:absolute; border-radius:50%; filter:blur(90px); z-index:0; opacity:.55;
  animation:blobfloat 14s ease-in-out infinite;
}
.blob-1{ width:520px; height:520px; background:radial-gradient(circle,var(--accent-2),transparent 70%); top:-120px; left:-160px; }
.blob-2{ width:460px; height:460px; background:radial-gradient(circle,var(--accent-1),transparent 70%); bottom:-140px; right:-120px; animation-delay:-6s; }
@keyframes blobfloat{ 0%,100%{ transform:translate(0,0) scale(1); } 50%{ transform:translate(40px,-30px) scale(1.08); } }

.hero-content{
  display:grid; grid-template-columns:1.1fr .9fr; gap:60px; align-items:center;
  max-width:1200px; width:100%; padding:0 8vw; z-index:2;
}
.pre-title{
  font-family:'Space Mono', monospace; font-size:.8rem; letter-spacing:2px;
  color:var(--accent-1); display:flex; align-items:center; gap:10px; margin-bottom:22px;
}
.dot-pulse{ width:8px; height:8px; border-radius:50%; background:var(--accent-1); box-shadow:0 0 0 0 rgba(0,245,212,.6); animation:pulse 2s infinite; }
@keyframes pulse{ 0%{ box-shadow:0 0 0 0 rgba(0,245,212,.6);} 70%{ box-shadow:0 0 0 10px rgba(0,245,212,0);} 100%{ box-shadow:0 0 0 0 rgba(0,245,212,0);} }

.hero-title{ font-size:clamp(2.3rem, 5.2vw, 4rem); font-weight:700; line-height:1.15; margin-bottom:24px; }
.hero-tagline{ color:var(--text-2); font-size:1.1rem; max-width:520px; margin-bottom:36px; line-height:1.7; }
.hero-cta{ display:flex; gap:18px; flex-wrap:wrap; }

.hero-visual{ display:flex; justify-content:center; }
.portrait-frame{
  position:relative; width:min(400px, 80vw); aspect-ratio:1/1;
}
.portrait-ring{
  position:absolute; inset:-18px; border-radius:50%;
  border:2px dashed rgba(0,245,212,0.35); animation:spin 30s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }
.portrait-img{
  width:100%; height:100%; border-radius:50%; object-fit:cover;
  box-shadow:0 0 0 6px rgba(255,255,255,0.05), 0 30px 60px -20px rgba(0,245,212,0.35);
  background:var(--glass); backdrop-filter:blur(6px);
}
.float-icon{
  position:absolute; width:52px; height:52px; border-radius:16px;
  background:var(--glass); border:1px solid var(--glass-border); backdrop-filter:blur(12px);
  display:flex; align-items:center; justify-content:center; font-size:1.4rem;
  box-shadow:0 12px 30px -8px rgba(0,0,0,0.5);
  animation:floaty 6s ease-in-out infinite;
}
.fi-1{ top:-6%; left:-10%; animation-delay:0s; }
.fi-2{ top:8%; right:-14%; animation-delay:.6s; }
.fi-3{ top:45%; left:-18%; animation-delay:1.2s; }
.fi-4{ bottom:6%; left:-8%; animation-delay:1.8s; }
.fi-5{ bottom:-6%; right:6%; animation-delay:2.4s; }
.fi-6{ top:48%; right:-16%; animation-delay:3s; }
.fi-7{ top:-8%; left:32%; animation-delay:3.6s; }
@keyframes floaty{ 0%,100%{ transform:translateY(0px); } 50%{ transform:translateY(-16px); } }

.scroll-indicator{
  position:absolute; bottom:36px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px; z-index:2;
}
.mouse{ width:26px; height:42px; border:2px solid rgba(255,255,255,0.4); border-radius:16px; display:block; position:relative; }
.wheel{ width:4px; height:8px; background:var(--accent-1); border-radius:2px; position:absolute; top:6px; left:50%; transform:translateX(-50%); animation:wheel 1.6s infinite; }
@keyframes wheel{ 0%{ opacity:1; top:6px;} 70%{ opacity:0; top:22px;} 100%{ opacity:0; top:6px;} }
.scroll-txt{ font-size:.7rem; letter-spacing:2px; color:var(--text-2); text-transform:uppercase; }

@media(max-width:900px){
  .hero-content{ grid-template-columns:1fr; text-align:center; }
  .hero-tagline{ margin-inline:auto; }
  .hero-cta{ justify-content:center; }
  .hero-visual{ order:-1; margin-bottom:20px; }
}

/* ==========================================================
   ABOUT
   ========================================================== */
.about-grid{ display:grid; grid-template-columns:1.4fr .8fr; gap:60px; }
.lead{ font-size:1.15rem; line-height:1.8; margin-bottom:20px; color:var(--text-1); }
.about-copy p{ color:var(--text-2); line-height:1.8; margin-bottom:18px; }
.about-highlights{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:30px; }
.highlight-card{
  background:var(--glass); border:1px solid var(--glass-border); border-radius:var(--radius);
  padding:22px 18px; backdrop-filter:blur(14px); transition:transform .3s var(--ease), border-color .3s;
}
.highlight-card:hover{ transform:translateY(-6px); border-color:var(--accent-1); }
.hl-icon{ font-size:1.8rem; display:block; margin-bottom:10px; }
.highlight-card h4{ font-size:1rem; margin-bottom:6px; }
.highlight-card p{ font-size:.85rem; color:var(--text-2); }

.about-stats{ display:grid; grid-template-columns:1fr 1fr; gap:18px; align-content:start; }
.stat-card{
  background:linear-gradient(160deg, rgba(0,245,212,0.08), rgba(123,47,247,0.08));
  border:1px solid var(--glass-border); border-radius:var(--radius); padding:26px 20px;
  text-align:center; backdrop-filter:blur(14px);
}
.stat-num{ font-size:2.4rem; font-weight:700; font-family:'Space Mono', monospace; color:var(--accent-1); display:block; }
.stat-label{ font-size:.8rem; color:var(--text-2); margin-top:6px; display:block; }

@media(max-width:900px){
  .about-grid{ grid-template-columns:1fr; }
  .about-highlights{ grid-template-columns:1fr; }
}

/* ==========================================================
   SKILLS
   ========================================================== */
.skills-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; }
.skill-category{
  background:var(--glass); border:1px solid var(--glass-border); border-radius:var(--radius);
  padding:32px; backdrop-filter:blur(14px);
}
.skill-category.full-span{ grid-column:1/-1; }
.skill-category h3{ display:flex; align-items:center; gap:10px; margin-bottom:24px; font-size:1.15rem; }
.cat-icon{ font-size:1.4rem; }

.skill-bar{ margin-bottom:20px; }
.skill-bar-top{ display:flex; justify-content:space-between; font-size:.9rem; margin-bottom:8px; color:var(--text-2); }
.skill-pct{ color:var(--accent-1); font-family:'Space Mono', monospace; }
.skill-track{ height:8px; border-radius:6px; background:rgba(255,255,255,0.08); overflow:hidden; }
.skill-fill{
  height:100%; width:0%; border-radius:6px;
  background:linear-gradient(90deg,var(--accent-1),var(--accent-3));
  transition:width 1.4s var(--ease); box-shadow:0 0 12px rgba(0,245,212,0.5);
}

.radial-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.radial-skill{ text-align:center; position:relative; transition:transform .3s var(--ease); }
.radial-skill:hover{ transform:translateY(-4px); }
.radial-skill svg{ width:90px; height:90px; transform:rotate(-90deg); }
.radial-bg{ fill:none; stroke:rgba(255,255,255,0.08); stroke-width:8; }
.radial-fg{
  fill:none; stroke:var(--accent-1); stroke-width:8; stroke-linecap:round;
  stroke-dasharray:326.7; stroke-dashoffset:326.7; transition:stroke-dashoffset 1.4s var(--ease);
}
.radial-icon{ position:absolute; top:34%; left:50%; transform:translate(-50%,-50%); font-size:1.3rem; }
.radial-label{ display:block; font-size:.8rem; color:var(--text-2); margin-top:6px; }
.radial-value{ display:block; font-family:'Space Mono', monospace; color:var(--accent-1); font-size:.85rem; }

.chip-row{ display:flex; flex-wrap:wrap; gap:12px; }
.chip{
  padding:10px 18px; border-radius:30px; background:rgba(255,255,255,0.05);
  border:1px solid var(--glass-border); font-size:.85rem; transition:all .3s var(--ease);
}
.chip:hover{ background:var(--accent-2); border-color:var(--accent-2); transform:translateY(-3px); color:#fff; }

@media(max-width:900px){ .skills-grid{ grid-template-columns:1fr; } .radial-grid{ grid-template-columns:repeat(2,1fr); } }

/* ==========================================================
   PROJECTS
   ========================================================== */
.projects-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:28px; }
.project-card{
  position:relative; background:var(--glass); border:1px solid var(--glass-border);
  border-radius:var(--radius); padding:32px; backdrop-filter:blur(14px);
  transition:transform .4s var(--ease), border-color .4s; overflow:hidden;
}
.project-card:hover{ transform:translateY(-8px); border-color:var(--accent-1); }
.project-card-glow{
  position:absolute; width:220px; height:220px; background:radial-gradient(circle,var(--accent-2),transparent 70%);
  top:-80px; right:-80px; opacity:0; transition:opacity .4s; filter:blur(40px);
}
.project-card:hover .project-card-glow{ opacity:.5; }
.project-top{ display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; }
.project-icon{ font-size:2rem; }
.project-date{ font-family:'Space Mono', monospace; font-size:.75rem; color:var(--text-2); }
.project-card h3{ font-size:1.3rem; margin-bottom:6px; }
.project-role{ color:var(--accent-1); font-size:.85rem; margin-bottom:14px; }
.project-desc{ color:var(--text-2); font-size:.92rem; line-height:1.6; margin-bottom:16px; }
.project-metrics{ margin-bottom:18px; padding-left:18px; }
.project-metrics li{ list-style:disc; color:var(--text-2); font-size:.88rem; margin-bottom:6px; line-height:1.5; }
.project-metrics strong{ color:var(--accent-1); }
.project-stack{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:20px; }
.project-stack span{ font-size:.75rem; padding:6px 12px; border-radius:20px; background:rgba(58,123,213,0.15); color:#bcdcff; border:1px solid rgba(58,123,213,0.3); }
.project-link{ font-size:.9rem; font-weight:600; color:var(--accent-1); display:inline-flex; align-items:center; gap:6px; transition:gap .3s; }
.project-link:hover{ gap:12px; }

@media(max-width:900px){ .projects-grid{ grid-template-columns:1fr; } }

/* ==========================================================
   TIMELINE (journey)
   ========================================================== */
.timeline{ position:relative; max-width:820px; margin:0 auto; padding-left:40px; }
.timeline::before{
  content:''; position:absolute; left:14px; top:0; bottom:0; width:2px;
  background:linear-gradient(180deg,var(--accent-1),var(--accent-2),transparent);
}
.timeline-item{ position:relative; margin-bottom:38px; padding-left:36px; }
.timeline-dot{
  position:absolute; left:-40px; top:0; width:32px; height:32px; border-radius:50%;
  background:var(--bg-2); border:2px solid var(--accent-1); display:flex; align-items:center; justify-content:center;
  font-size:.95rem; box-shadow:0 0 16px rgba(0,245,212,0.4); z-index:2;
}
.timeline-card{
  background:var(--glass); border:1px solid var(--glass-border); border-radius:16px;
  padding:22px 24px; backdrop-filter:blur(12px); transition:transform .3s var(--ease), border-color .3s;
}
.timeline-item:hover .timeline-card{ transform:translateX(6px); border-color:var(--accent-1); }
.timeline-item.featured .timeline-card{ border-color:var(--accent-1); background:linear-gradient(160deg, rgba(0,245,212,0.08), rgba(123,47,247,0.08)); }
.tl-date{ font-family:'Space Mono', monospace; font-size:.75rem; color:var(--accent-1); }
.timeline-card h4{ margin:8px 0 4px; font-size:1.1rem; }
.tl-org{ color:var(--text-2); font-size:.85rem; margin-bottom:8px; }
.timeline-card p{ color:var(--text-2); font-size:.9rem; line-height:1.6; }

@media(max-width:600px){ .timeline{ padding-left:26px; } .timeline-dot{ left:-30px; width:26px; height:26px; font-size:.8rem; } }

/* ==========================================================
   CERTIFICATIONS
   ========================================================== */
.cert-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.cert-card{
  background:var(--glass); border:1px solid var(--glass-border); border-radius:16px;
  padding:26px; text-align:center; backdrop-filter:blur(12px); transition:all .35s var(--ease);
}
.cert-card:hover{ transform:translateY(-6px) rotate(-1deg); border-color:var(--accent-2); box-shadow:0 20px 40px -20px rgba(123,47,247,0.5); }
.cert-icon{ font-size:2rem; display:block; margin-bottom:12px; }
.cert-card h4{ font-size:.95rem; margin-bottom:6px; }
.cert-card p{ font-size:.8rem; color:var(--text-2); }

@media(max-width:900px){ .cert-grid{ grid-template-columns:1fr 1fr; } }
@media(max-width:560px){ .cert-grid{ grid-template-columns:1fr; } }

/* ==========================================================
   FINAL CTA
   ========================================================== */
.final-cta{
  text-align:center; position:relative; padding:160px 8vw;
  background:radial-gradient(circle at 50% 30%, rgba(123,47,247,0.18), transparent 60%);
}
.cta-content{ max-width:700px; margin:0 auto; }
.final-cta h2{ font-size:clamp(2rem, 4.5vw, 3.2rem); font-weight:700; margin:20px 0 18px; line-height:1.2; }
.final-cta p{ color:var(--text-2); font-size:1.05rem; margin-bottom:36px; }

/* ==========================================================
   FOOTER
   ========================================================== */
.footer{ position:relative; z-index:1; padding:80px 8vw 30px; border-top:1px solid var(--glass-border); }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; margin-bottom:50px; }
.footer-brand h3{ font-size:1.4rem; margin-bottom:10px; }
.footer-brand p{ color:var(--text-2); font-size:.9rem; margin-bottom:18px; }
.footer-contact h4, .footer-lang h4{ margin-bottom:16px; font-size:1rem; color:var(--text-1); }
.footer-link{ display:flex; align-items:center; gap:10px; color:var(--text-2); font-size:.9rem; margin-bottom:12px; transition:color .3s; }
.footer-link:hover{ color:var(--accent-1); }
.fi{ font-size:1rem; }
.footer-lang p{ color:var(--text-2); font-size:.9rem; margin-bottom:8px; }
.footer-bottom{ text-align:center; color:var(--text-2); font-size:.8rem; font-family:'Space Mono', monospace; }

@media(max-width:900px){ .footer-grid{ grid-template-columns:1fr; gap:30px; } }

/* ---------------- scrollbar ---------------- */
::-webkit-scrollbar{ width:8px; }
::-webkit-scrollbar-track{ background:var(--bg-1); }
::-webkit-scrollbar-thumb{ background:linear-gradient(var(--accent-1),var(--accent-2)); border-radius:4px; }