/* v6.7.2 complete stylesheet */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root { --bg-deep:#020b1a; --bg-panel:rgba(6,20,48,.92); --bg-panel-soft:rgba(6,20,48,.70); --border-soft:rgba(120,170,255,.35); --accent:#4f8dff; --accent-soft:#9fbfff; --text-main:#f4f7ff; --text-muted:#c3d4ff; --nav-bg:rgba(4,16,40,.96); }
body { font-family: system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; color:var(--text-main); background:var(--bg-deep); min-height:100vh; }
/* Background */
.background-layer { position:fixed; inset:0; z-index:-1; background-image:linear-gradient(180deg,rgba(2,11,26,.60),rgba(2,11,26,.78)), url("../img/background_CV_01.jpg"); background-position:center; background-size:cover; background-repeat:no-repeat; background-attachment:fixed; }
/* Header */
.site-header { position:fixed; top:0; left:0; right:0; display:flex; align-items:center; justify-content:space-between; padding:10px 24px; background:var(--nav-bg); border-bottom:1px solid var(--border-soft); z-index:1000; backdrop-filter:blur(10px); }
.logo-area{display:flex; align-items:center; gap:10px}
.logo-placeholder{ width:270px; height:50px; border-radius:8px; object-fit:cover; background:#1f3f7a }
.site-title{ font-weight:700; letter-spacing:.12em; text-transform:uppercase; font-size:.9rem; color:var(--accent-soft) }
/* Hamburger (3 horizontal lines -> animates to X) */
.nav-toggle{ display:none; position:relative; width:42px; height:36px; border:1px solid rgba(255,255,255,.18); border-radius:8px; background:rgba(6,20,48,.55); cursor:pointer; align-items:center; justify-content:center }
.nav-toggle__bar{ position:absolute; left:10px; right:10px; height:2.6px; background:#fff; border-radius:2px; transition: transform .25s ease, opacity .2s ease, top .25s ease }
.nav-toggle__bar:nth-child(1){ top:11px }
.nav-toggle__bar:nth-child(2){ top:17px }
.nav-toggle__bar:nth-child(3){ top:23px }
body.nav-open .nav-toggle__bar:nth-child(1){ transform: translateY(6px) rotate(45deg) }
body.nav-open .nav-toggle__bar:nth-child(2){ opacity:0 }
body.nav-open .nav-toggle__bar:nth-child(3){ transform: translateY(-6px) rotate(-45deg) }
/* Nav */
.main-nav{ display:flex; flex-wrap:wrap; gap:12px; font-size:.85rem }
.main-nav a{ color:var(--text-muted); text-decoration:none; padding:6px 10px; border-radius:999px; transition:color .2s ease, background-color .2s ease }
.main-nav a:hover{ color:var(--text-main); background-color:rgba(79,141,255,.16) }
/* Wrapper */
.content-wrapper{ max-width:1100px; margin:0 auto; padding:100px 16px 60px }
/* Hero */
.hero{ margin:10px 0 24px }
.hero--shaded{ background:rgba(6,20,48,.55); padding:20px 22px 18px; border-radius:0; box-shadow:0 10px 28px rgba(0,0,0,.22); backdrop-filter:blur(2px) }
.hero__title{ font-size:clamp(1.8rem,2.8vw + 1rem,2.6rem); line-height:1.15; letter-spacing:.01em; color:var(--text-main); margin-bottom:10px }
.hero__title--tech{ font-family:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif; font-weight:700 }
.hero__lead{ font-size:clamp(1rem,.7vw + .9rem,1.2rem); line-height:1.65; color:var(--text-main); margin-bottom:10px }
.hero__lead--muted{ color:var(--text-muted) }
/* Sections */
.content-section{ margin-bottom:32px; scroll-margin-top:90px }
.content-section h2{ font-size:1.3rem; margin-bottom:10px; letter-spacing:.08em; text-transform:uppercase; color:var(--accent-soft) }
/* Section box */
.indent {margin-left: 20px;}
.section-box{ position:relative; border-radius:14px; border:1px solid var(--border-soft); background:var(--bg-panel); padding:16px 18px 18px; display:flex; flex-direction:column; transition:border-color .2s ease, background .2s ease }
.section-inner{ max-height:260px; overflow:hidden; transition:max-height .3s ease; position:relative }
.section-inner-article{transition:max-height .3s ease; position:relative }
.section-box.expanded .section-inner{ max-height:none }
.section-box:hover{ border-color:rgba(159,191,255,.6) }
.section-overview, .section-more{ margin-bottom:10px }
.section-more{ display:none }
.section-box.expanded .section-more{ display:block }
/* Text */
.section-box p{ font-size:.93rem; line-height:1.55; color:var(--text-main); margin-bottom:8px }
.section-box h3{ font-size:1rem; margin:10px 0 4px; color:var(--accent-soft) }
.section-box ul{ margin:4px 0 10px 1.4rem; padding-left:0 }
.section-box li{ font-size:.9rem; line-height:1.5; color:var(--text-main); margin-bottom:4px }
/* Learn more */
.learn-more-btn{ align-self:flex-start; margin-top:6px; padding:6px 14px; border-radius:999px; border:1px solid var(--accent); background:transparent; color:var(--accent-soft); font-size:.85rem; cursor:pointer; transition:background-color .2s ease, color .2s ease, transform .1s ease }
.learn-more-btn:hover{ background:var(--accent); color:#fff }
.learn-more-btn:active{ transform:scale(.97) }

.read-more-btn {
  align-self: flex-start;
  margin-top: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent-soft);
  font-size: .85rem;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, transform .1s ease;

  /* REQUIRED for <a> */
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

/* Contact */
.contact-box{ display:flex; gap:20px }
.contact-column{ flex:1 1 0; min-width:0 }
.contact-form label{ display:block; font-size:.85rem; margin-bottom:4px; color:var(--text-muted) }
.contact-form input, .contact-form textarea{ width:100%; padding:8px 10px; margin-bottom:10px; border-radius:6px; border:1px solid rgba(120,170,255,.5); background:rgba(3,12,32,.96); color:var(--text-main); font-size:.9rem; resize:none }
.contact-form input:focus, .contact-form textarea:focus{ outline:none; border-color:var(--accent) }
.submit-btn{ padding:8px 18px; border-radius:999px; border:none; background:var(--accent); color:#fff; font-size:.9rem; cursor:pointer; transition:background-color .2s ease, transform .1s ease }
.submit-btn:hover{ background:#3b76e0 }
.submit-btn:active{ transform:scale(.97) }
.contact-column a{ color:var(--accent-soft); text-decoration:none }
.contact-column a:hover{ text-decoration:underline }
.success-message{ background:rgba(50,150,80,.25); border:1px solid rgba(50,200,120,.5); padding:12px 16px; border-radius:8px; margin-bottom:16px; color:#b6ffd0; font-size:.9rem }
/* Footer */
.site-footer{ text-align:center; padding:16px 0 24px; font-size:.8rem; color:var(--text-muted) }
/* Floating Contact button on ALL viewports */
.mobile-contact-btn{ position:fixed; bottom:20px; right:24px; background:var(--accent); color:#fff; padding:12px 22px; border-radius:999px; font-size:1rem; text-decoration:none; box-shadow:0 10px 26px rgba(0,0,0,.28); z-index:2147483000 }
.mobile-contact-btn:hover{ background:#3b76e0 }
@media(max-width:700px){ .mobile-contact-btn{ bottom:18px; right:18px; padding:12px 20px; font-size:.95rem } }
/* Responsive */
@media(max-width:1000px){ .nav-toggle{ display:inline-flex } .main-nav{ position:absolute; top:60px; right:10px; left:10px; background:rgba(4,16,40,.98); border:1px solid var(--border-soft); border-radius:12px; padding:10px; display:none; flex-direction:column; gap:6px } body.nav-open .main-nav{ display:flex } .main-nav a{ padding:10px 12px } }
@media(max-width:900px){ .site-header{ flex-wrap:nowrap; gap:8px; padding:8px 16px } .content-wrapper{ padding-top:120px } }
@media(max-width:800px){ .contact-box{ flex-wrap:wrap } .contact-column{ flex:1 1 100% } }
@media(min-width:900px){ .contact-box{ display:grid; grid-template-columns:1.2fr 1fr; gap:28px; align-items:start } }
@media(max-width:700px){ .section-inner{ max-height:360px } .hero__title{ font-size:clamp(1.6rem,5.5vw,2.2rem) } .hero__lead{ font-size:1rem } }

/* ================= Added for requested changes ================ */
/* Utility class for accessible, initially hidden feedback */
.visually-hidden {
  position: absolute !important;
  white-space: nowrap;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
  clip-path: inset(50%); border: 0; padding: 0; margin: -1px;
}

/* Prevent image overflow in right contact column on small screens */
.contact-column img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Harden input sizing to avoid overflow from borders/padding */
.contact-form input,
.contact-form textarea {
  max-width: 100%;
}

/* Remove heavy background image on mobile (keep gradient), disable fixed attachment */
@media (max-width: 700px) {
  .background-layer {
    background-image: linear-gradient(180deg, rgba(2,11,26,.60), rgba(2,11,26,.78));
    background-attachment: scroll;
  }
}