/* ══ portfolio-toi — Shared Styles ══
   Màu accent: Green #1a6b52 · Nền tối: #0c0b09
   Font: DM Sans · Bootstrap 5.3.3
*/
:root {
  --bg:#faf9f7; --surface:#fff; --dark:#0c0b09; --dark2:#141210; --dark3:#1a1917;
  --border:#e8e5df; --border-light:#f0ede8; --border-dark:rgba(255,255,255,.07);
  --text:#1a1917; --text-2:#6b6760; --text-3:#a09d97;
  --accent:#1a6b52; --accent-h:#155a44; --accent-light:#e8f4ef; --accent-mid:#2d9b73;
  --warm:#f5f0e8; --warm2:#ede8df; --danger:#e24b4a;
  --sans:'DM Sans',sans-serif;
  --bs-body-font-family:var(--sans);
}
html { scroll-behavior:smooth; }
body { font-family:var(--sans); background:var(--dark); color:#fff; overflow-x:hidden; -webkit-font-smoothing:antialiased; }
::-webkit-scrollbar { width:4px; }
::-webkit-scrollbar-thumb { background:#2a2926; border-radius:4px; }
img { display:block; }
.wd-container { max-width:1100px; margin:0 auto; padding:0 clamp(20px,5vw,80px); }
.sec-pad { padding:clamp(72px,10vw,120px) 0; }
.sec-light { background:var(--bg); }
.sec-mid { background:#111009; }

/* Reveal */
.reveal { opacity:0; transform:translateY(28px); transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.visible { opacity:1; transform:none; }
.reveal-d1 { transition-delay:.08s; } .reveal-d2 { transition-delay:.16s; } .reveal-d3 { transition-delay:.24s; }

/* Eyebrow */
.eyebrow { display:inline-flex;align-items:center;gap:7px;font-size:11px;font-weight:500;color:#4ade80;text-transform:uppercase;letter-spacing:1.4px;margin-bottom:14px; }
.eyebrow::before,.eyebrow::after { content:'';width:16px;height:1px;background:#4ade80; }
.eyebrow-dark { color:var(--accent); }
.eyebrow-dark::before,.eyebrow-dark::after { background:var(--accent); }
.sec-title { font-size:clamp(26px,3.8vw,44px);font-weight:600;line-height:1.1;letter-spacing:-.8px;margin-bottom:14px; }
.sec-title em { color:var(--accent-mid);font-style:italic;font-weight:300; }
.sec-sub { font-size:15px;font-weight:300;line-height:1.75;max-width:520px; }

/* Nav */
#nav { position:fixed;top:0;left:0;right:0;z-index:500;background:rgba(12,11,9,.0);backdrop-filter:blur(0);border-bottom:1px solid transparent;transition:all .35s; }
#nav.scrolled { background:rgba(12,11,9,.92);backdrop-filter:blur(18px);border-color:rgba(255,255,255,.06); }
.nav-inner { height:64px;display:flex;align-items:center;justify-content:space-between; }
.logo { font-size:17px;font-weight:600;color:#fff;text-decoration:none;letter-spacing:-.5px; }
.logo span { color:#4ade80; }
.nav-links { display:flex;gap:28px; }
.nav-links a { font-size:13.5px;color:rgba(255,255,255,.5);text-decoration:none;transition:color .2s; }
.nav-links a:hover,.nav-links a.active { color:#fff; }
.nav-cta { font-size:13px;font-weight:500;background:var(--accent);color:#fff;padding:9px 22px;border-radius:8px;border:none;cursor:pointer;text-decoration:none;transition:all .2s;font-family:var(--sans); }
.nav-cta:hover { background:var(--accent-h);color:#fff; }
.nav-hamburger { display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;border:none;background:transparent; }
.nav-hamburger span { display:block;width:22px;height:2px;background:rgba(255,255,255,.6);border-radius:2px;transition:all .3s; }
.nav-hamburger.open span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity:0; }
.nav-hamburger.open span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }
.nav-mobile { position:fixed;inset:0;background:rgba(12,11,9,.98);z-index:490;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;opacity:0;pointer-events:none;transition:opacity .3s; }
.nav-mobile.open { opacity:1;pointer-events:auto; }
.nav-mobile a { font-size:22px;font-weight:500;color:rgba(255,255,255,.5);text-decoration:none;transition:color .2s; }
.nav-mobile a:hover { color:#fff; }
.nav-mobile .nm-cta { font-size:15px;background:var(--accent);color:#fff;padding:13px 36px;border-radius:9px;margin-top:8px; }
@media(max-width:768px) { .nav-links,.nav-cta { display:none; } .nav-hamburger { display:flex; } }

/* Buttons */
.btn-accent { font-size:14px;font-weight:500;background:var(--accent);color:#fff;padding:12px 26px;border-radius:9px;border:none;cursor:pointer;font-family:var(--sans);transition:all .2s;text-decoration:none;display:inline-block; }
.btn-accent:hover { background:var(--accent-h);transform:translateY(-1px);color:#fff; }
.btn-outline { font-size:14px;background:transparent;color:rgba(255,255,255,.65);padding:12px 26px;border-radius:9px;border:1px solid rgba(255,255,255,.2);cursor:pointer;font-family:var(--sans);transition:all .2s;text-decoration:none;display:inline-block; }
.btn-outline:hover { border-color:rgba(255,255,255,.55);color:#fff; }
.btn-ghost-light { font-size:14px;background:transparent;color:var(--text-2);padding:12px 26px;border-radius:9px;border:1px solid var(--border);cursor:pointer;font-family:var(--sans);transition:all .2s;text-decoration:none;display:inline-block; }
.btn-ghost-light:hover { background:var(--warm);color:var(--text); }

/* Project card */
.pj-card { border-radius:14px;overflow:hidden;background:#1a1917;border:1px solid rgba(255,255,255,.07);transition:border-color .25s,transform .3s cubic-bezier(.16,1,.3,1); }
.pj-card:hover { border-color:var(--accent-mid);transform:translateY(-5px); }
.pj-img { width:100%;aspect-ratio:16/10;object-fit:cover;display:block;transition:transform .5s; }
.pj-card:hover .pj-img { transform:scale(1.04); }
.pj-body { padding:20px 22px; }
.pj-cat { font-size:11px;font-weight:500;color:var(--accent-mid);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px; }
.pj-name { font-size:16px;font-weight:600;color:#fff;letter-spacing:-.3px;margin-bottom:8px; }
.pj-desc { font-size:13px;font-weight:300;color:rgba(255,255,255,.4);line-height:1.7;margin-bottom:14px; }
.pj-tags { display:flex;flex-wrap:wrap;gap:6px; }
.pj-tag { font-size:11px;color:rgba(255,255,255,.35);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);padding:3px 10px;border-radius:4px; }

/* Skill tag */
.skill-tag { display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:400;color:rgba(255,255,255,.65);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);padding:8px 16px;border-radius:8px;transition:all .2s; }
.skill-tag:hover { border-color:var(--accent-mid);color:#fff; }
.skill-dot { width:6px;height:6px;border-radius:50%;background:var(--accent-mid);flex-shrink:0; }

/* Social link */
.social-link { display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.4);font-size:15px;text-decoration:none;transition:all .2s; }
.social-link:hover { border-color:var(--accent-mid);color:#4ade80; }

/* Form */
.form-label { font-size:12px;font-weight:500;color:rgba(255,255,255,.45);margin-bottom:6px;display:block; }
.form-control { font-family:var(--sans);font-size:14px;font-weight:300;color:#fff;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:.6rem .85rem;transition:border-color .15s;width:100%;box-sizing:border-box; }
.form-control:focus { border-color:var(--accent-mid);outline:none;background:rgba(255,255,255,.07); }
.form-control::placeholder { color:rgba(255,255,255,.2); }
textarea.form-control { resize:vertical;min-height:120px; }

/* Footer */
footer { background:#080706;border-top:1px solid rgba(255,255,255,.04); }
.ft-copy { font-size:12px;font-weight:300;color:rgba(255,255,255,.18); }

/* Zalo float */
.zf { position:fixed;bottom:26px;right:26px;z-index:400;display:flex;flex-direction:column;align-items:flex-end;gap:8px; }
.zf-tip { font-size:12px;background:#1a1917;color:rgba(255,255,255,.7);padding:6px 12px;border-radius:6px;opacity:0;transform:translateX(6px);transition:all .2s;pointer-events:none;white-space:nowrap;border:1px solid rgba(255,255,255,.08); }
.zf:hover .zf-tip { opacity:1;transform:none; }
.zf-btn { width:48px;height:48px;border-radius:50%;background:#0068FF;display:flex;align-items:center;justify-content:center;border:none;font-size:22px;box-shadow:0 4px 18px rgba(0,104,255,.38);transition:transform .2s;cursor:pointer; }
.zf-btn:hover { transform:scale(1.09); }