/* ============ RESET / BASE ============ */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:#0f172a;
  background:#ffffff;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
ul{padding-left:18px}
li{margin:8px 0}

:root{
  --container-w: 90%;
  --gutter: 48px;
  --section-py: 80px;

  --muted:#6b7280;
  --card:#ffffff;
  --primary:#007893;

  --chip-python:#fdeaa0;
  --chip-hadoop:#d8e7ff;
  --chip-spark:#d8e7ff;
  --chip-sql:#ffd1e5;

  --yellow:#fdeaa0;
  --pink:#ffd1e5;
  --green:#d9f5e1;
  --blue:#d8e7ff;
  --neutral:#eef2f6;

  --radius:18px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
}
.container{
  width: min(100% - (var(--gutter) * 2), var(--container-w));
  margin-inline: auto;
}
.section{padding-block:var(--section-py);}
.alt{background:#f3f5f9;}
.muted{color:var(--muted)}
.card{
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  border:1px solid #e7ecf4;
}
.lift{transition:.2s ease}
.lift:hover{transform:translateY(-2px)}

/* ============ HEAD ============ */
.projects-head{display:grid;gap:8px;margin-bottom:14px}
.projects-head h1{
  font-size:clamp(30px,3.2vw,44px);
  font-weight:900;line-height:1.15;
}

/* FILTERS */
.filters{padding:14px 16px;margin:8px 0 18px;}
.filters-row{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-end;}
.filter-block{display:grid;gap:8px;min-width:180px;position:relative;}
.filter-dropdown{
  padding:8px 12px;font-size:13px;font-weight:500;background:#fff;
  border:1px solid #dbe2ee;border-radius:8px;color:#0f172a;cursor:pointer;
  transition:.2s ease;font-family:inherit;display:flex;align-items:center;
  justify-content:space-between;gap:8px;
}
.filter-dropdown:hover{border-color:#b0b8c5;background:#f8f9fb;}
.filter-arrow{font-size:10px;color:#64748b;transition:transform .2s ease;}
.filter-dropdown.active .filter-arrow{transform:rotate(180deg);}
.filter-menu{
  position:absolute;top:100%;left:0;right:0;background:#fff;
  border:1px solid #dbe2ee;border-radius:8px;
  box-shadow:0 8px 20px rgba(15,23,42,.12);
  padding:8px 0;margin-top:4px;display:none;z-index:10;max-height:300px;overflow-y:auto;
}
.filter-menu.open{display:block;}
.filter-option{
  display:flex;align-items:center;gap:8px;padding:10px 12px;
  font-size:13px;font-weight:500;color:#64748b;cursor:pointer;
  transition:.15s ease;user-select:none;
}
.filter-option:hover{background:#f8f9fb;color:#0f172a;}
.filter-option input[type="checkbox"]{accent-color:var(--primary);cursor:pointer;}
.filter-option:has(input:checked){
  background:rgba(0,120,147,.08);
  color:var(--primary);font-weight:600;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 30px;border-radius:12px;border:1px solid #dbe2ee;background:#fff;
  font-weight:600;font-size:15px;transition:.2s ease;
  box-shadow:0 4px 12px rgba(0,0,0,.03);gap:10px;cursor:pointer;
}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:#f3f5f9;border:none;font-weight:500;padding:10px 20px;font-size:13px;}
.btn.ghost.small{font-size:12px;}

/* GRID */
.projects-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:28px;
  margin-top:12px;
}
.card-btn{
  width:100%;
  text-align:left;
  background:transparent;
  border:none;
  cursor:pointer;
  padding:0;
}

/* PROJECT CARD */
.project-card{
  position:relative;
  padding:0;
  overflow:hidden;
  border-radius:22px;
  background:#fff;
  border:1px solid #e7ecf4;
  box-shadow:0 12px 28px rgba(15,23,42,.10);
  transition:.25s ease;
}
.project-card:hover{
  transform:translateY(-3px);
  box-shadow:0 16px 40px rgba(15,23,42,.14);
}

/* MEDIA */
.project-media{
  position:relative;
  height:240px;
  overflow:hidden;
  background:#fff;
}
.project-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s cubic-bezier(.2,.8,.2,1), opacity .25s ease;
  transform:translateX(0%);
  filter:saturate(1.03) contrast(1.02);
}

/* FULL CARD overlay */
.project-overlay-mini{
  position:absolute;
  inset:0;
  background:#fff;              /* ✅ che kín luôn */
  padding:18px;
  display:grid;
  gap:8px;
  z-index:2;

  transform:translateX(100%);
  transition:transform .6s cubic-bezier(.2,.8,.2,1), opacity .25s ease;
  opacity:0;
}
.project-card:hover .project-overlay-mini{
  transform:translateX(0%);
  opacity:1;
}

/* hover: hide preview + slight motion */
.project-card:hover .project-media img{
  transform:translateX(-20%);
  opacity:0;                    /* ✅ không còn thấy mờ */
}

/* BODY */
.project-body{
  padding:32px;
  background:#fff;
  position:relative;
  z-index:1;
  transition:opacity .25s ease, transform .25s ease;
}
.project-card:hover .project-body{
  opacity:0;
  transform:translateY(10px);
}

.project-body h3{font-size:18px;font-weight:900;margin-bottom:8px}
.project-body p{margin:8px 0;font-size:14.5px;color:#111827}

.overlay-p{font-size:14.5px}
.overlay-list{font-size:14.5px}

/* CHIPS */
.chips{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:10px}
.chips.center{justify-content:center;}
.chip{
  font-size:11px;font-weight:900;
  padding:6px 10px;border-radius:999px;
  background:#eef2f7;color:#0f172a;border:1px solid #e5e9f2;
}
.chip.python{background:var(--chip-python)}
.chip.sql{background:var(--chip-sql)}
.chip.hadoop{background:var(--chip-hadoop);color:#0b1220}
.chip.spark{background:var(--chip-spark);color:#0b1220}
.chip.powerbi{background:var(--chip-python)}
.chip.analysis{background:var(--green);color:#0b1220}
.chip.database{background:var(--pink)}
.chip.web{background:var(--neutral)}

/* ====== DETAIL OVERLAY (1 COLUMN) ====== */
.detail-overlay{position:fixed;inset:0;z-index:999;display:none;}
.detail-overlay.open{display:block;}
.detail-backdrop{position:absolute;inset:0;background:rgba(15,23,42,.45);}

.detail-panel{
  position:relative;
  width:min(100% - 24px, 980px);
  margin:2vh auto;
  height:90vh;
  max-height:90vh;
  overflow-y:auto;
  border-radius:22px;
  padding:18px 22px 20px;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.detail-close{
  position:sticky;
  top:0;
  align-self:flex-end;
  border:none;background:#111827;color:#fff;
  width:36px;height:36px;border-radius:999px;
  font-weight:900;cursor:pointer;box-shadow:var(--shadow);z-index:2;
}

/* top area */
.detail-top{
  text-align:center;
  display:grid;
  gap:6px;
}
.detail-title-row{
  display:flex;
  align-items:center;
  gap:12px;
  justify-content:center;
}
.detail-top h2{
  font-size:22px;
  font-weight:900;
  line-height:1.25;
  margin:0;
}
.github-icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:8px;background:#f3f5f9;
  color:#0f172a;border:1px solid #e7ecf4;transition:.2s ease;flex-shrink:0;
}
.github-icon-btn:hover{
  background:#e9eef7;transform:translateY(-2px);color:var(--primary);
}

/* stack 1 col */
.detail-stack{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
}
.detail-card{
  background:#fff;
  border:1px solid #e7ecf4;
  border-radius:14px;
  padding:12px 14px;
}
.detail-card h3{
  font-size:14.5px;
  font-weight:900;
  margin-bottom:6px;
}

/* bottom image */
.detail-figure.bottom{
  width:100%;
  margin-top:4px;
}
.detail-img{
  width:100%;
  height:auto;
  aspect-ratio:16/9;
  object-fit:contain;
  background:#f8fafc;
  border-radius:14px;
  border:1px solid #e7ecf4;
  padding:6px;
}

/* RESPONSIVE */
@media (max-width: 980px){
  .projects-grid{grid-template-columns:1fr}
}
@media (max-width: 640px){
  :root{--gutter:8px;--section-py:46px}
  .project-media{height:200px}
  .detail-img{aspect-ratio:auto;min-height:190px}
  .filter-block{min-width:160px}
}