:root{
 --bg:#061426;--bg2:#081b30;--bg3:#0a2037;--panel:#0b1f36;--panel2:#102a46;--line:#1d3f63;
 --blue:#1685ff;--blue2:#39a3ff;--cyan:#72d0ff;--white:#f4f8ff;--muted:#a9bad0;--soft:#f4f7fb;
 --max:1180px;--success:#28c081;--danger:#ef6a6a;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:radial-gradient(circle at top,#0b1f38 0%,#061426 45%,#05111e 100%);color:var(--white);line-height:1.6}
a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(4,15,29,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.07)}
.header-inner{height:74px;display:flex;align-items:center;justify-content:space-between;gap:26px}.brand{display:flex;align-items:center;gap:11px;font-weight:800}
.brand-mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#1390ff,#005fcf);display:grid;place-items:center;font-size:20px;box-shadow:0 10px 30px rgba(19,144,255,.28)}
.nav{display:flex;gap:28px;align-items:center;font-size:14px;font-weight:700;color:#d8e6f7}.nav a{position:relative;padding:4px 0}.nav a:hover,.nav a.active{color:var(--cyan)}.nav a.active:after,.nav a:hover:after{content:"";position:absolute;left:0;right:0;bottom:-10px;height:2px;background:linear-gradient(90deg,var(--blue2),transparent)}
.menu-toggle{display:none;border:1px solid #335575;background:none;color:white;padding:8px 10px;border-radius:7px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:10px;background:linear-gradient(180deg,#1f8fff,#1078f0);border:1px solid #1b84ff;font-weight:800;color:white;transition:.2s;box-shadow:0 10px 30px rgba(22,133,255,.20)}.btn:hover{transform:translateY(-1px);box-shadow:0 14px 36px rgba(22,133,255,.28)}.btn-outline{background:rgba(255,255,255,.03);border-color:#4d6885;color:#edf5ff;box-shadow:none}.btn-small{padding:9px 14px;font-size:13px}
.hero{min-height:680px;position:relative;display:flex;align-items:center;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#061426 0%,rgba(6,20,38,.95) 32%,rgba(6,20,38,.52) 63%,rgba(6,20,38,.18) 100%),url('../images/hero-v2.jpg') center/cover no-repeat}.hero:after{content:"";position:absolute;inset:auto -10% -120px auto;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(60,157,255,.16),rgba(60,157,255,0));filter:blur(12px)}
.hero-content{position:relative;z-index:2;max-width:800px;padding:86px 0 90px}.eyebrow{color:#54b6ff;text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:900}.hero h1,.page-hero h1{font-size:clamp(46px,7vw,76px);line-height:1.02;margin:8px 0 14px;letter-spacing:-.045em}.hero .sub{font-size:20px;font-weight:800;color:#f0f6ff}.hero p{font-size:18px;color:#c4d3e5;max-width:700px}.actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:28px}
.hero-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:34px;max-width:760px}.metric{padding:16px 18px;border:1px solid rgba(132,175,218,.22);border-radius:14px;background:rgba(6,24,42,.58);backdrop-filter:blur(8px)}.metric strong{display:block;font-size:24px;line-height:1;color:#fff}.metric span{display:block;font-size:13px;color:#afc2d7;margin-top:7px}
.feature-strip{border-top:1px solid #173653;border-bottom:1px solid #173653;background:rgba(8,24,43,.84)}.features{display:grid;grid-template-columns:repeat(4,1fr)}.feature{padding:24px;display:flex;gap:15px;border-right:1px solid #173653}.feature:last-child{border-right:0}.feature-icon{flex:0 0 auto;width:44px;height:44px;border-radius:12px;background:#0d3a6d;color:#54b7ff;display:grid;place-items:center;font-size:21px;font-weight:900}.feature strong{display:block}.feature small{display:block;color:#9fb1c7;margin-top:3px}
.section{padding:82px 0}.section-alt{background:linear-gradient(180deg,rgba(8,26,47,.92),rgba(5,17,30,.95))}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-head h2{font-size:clamp(32px,5vw,48px);margin:5px 0 0;line-height:1.08;letter-spacing:-.03em}.section-head p{color:var(--muted);max-width:650px;margin:8px 0 0}
.about-grid{display:grid;grid-template-columns:.95fr 1.25fr;gap:52px;align-items:center}.about-visual{min-height:430px;border-radius:22px;background:linear-gradient(145deg,rgba(17,132,255,.18),rgba(5,20,38,.22)),url('../images/infrastructure-v2.jpg') center/cover;box-shadow:0 25px 70px rgba(0,0,0,.28);position:relative;border:1px solid rgba(115,168,220,.15)}.about-visual-alt{background:linear-gradient(145deg,rgba(17,132,255,.18),rgba(5,20,38,.22)),url('../images/hero-v2.jpg') center/cover}.about-visual:after{content:"30+ YEARS";position:absolute;left:24px;bottom:24px;background:#061426;padding:10px 14px;border-radius:8px;font-weight:900;letter-spacing:.08em}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:22px 0}.check{color:#bdd0e6}.check:before{content:"✓";color:#32a5ff;font-weight:900;margin-right:8px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{background:linear-gradient(180deg,rgba(12,37,66,.92),rgba(9,27,46,.92));border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 10px 28px rgba(0,0,0,.18);transition:.2s}.card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(0,0,0,.30);border-color:#275582}.card img{width:100%;aspect-ratio:16/9;object-fit:cover}.card-body{padding:20px 20px 18px}.card .category{font-size:12px;color:#59b8ff;text-transform:uppercase;letter-spacing:.1em;font-weight:900}.card h3{font-size:22px;line-height:1.2;margin:7px 0 10px}.card p{color:var(--muted);margin:0}
.mini-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.mini-tags span{padding:6px 10px;border:1px solid #2f557c;border-radius:999px;background:#0a2340;color:#d6e8fb;font-size:12px;font-weight:700}.text-link{display:inline-flex;gap:7px;align-items:center;color:#5ebcff;font-weight:800;margin-top:16px}
.tech-cloud,.tag-row{display:flex;flex-wrap:wrap;gap:9px}.tech,.tag{padding:8px 11px;border:1px solid #315579;border-radius:999px;background:#0b2038;font-size:13px;color:#d8e8fa;font-weight:700}
.page-hero{padding:78px 0 68px;background:linear-gradient(120deg,#07192f,#0e2e50)}.page-hero h1{font-size:52px}.page-hero p{color:#bdcde0;max-width:760px;font-size:17px}
.projects-stack{display:grid;gap:28px}.project-detail{display:grid;grid-template-columns:.95fr 1.2fr;gap:34px;padding:0;overflow:hidden;background:linear-gradient(180deg,rgba(12,37,66,.92),rgba(9,27,46,.92));border:1px solid #204467;border-radius:20px;box-shadow:0 12px 30px rgba(0,0,0,.14)}.project-detail img{width:100%;height:100%;min-height:280px;object-fit:cover}.project-detail>div{padding:28px}.project-detail h2{font-size:30px;margin:4px 0 12px;line-height:1.15}.project-detail p{color:#b1c2d5}.project-detail .lead{color:#dce7f5;font-size:17px}
.timeline{border-left:2px solid #254866;margin-left:8px;padding-left:29px}.timeline-item{position:relative;padding:0 0 31px}.timeline-item:before{content:"";position:absolute;left:-37px;top:7px;width:14px;height:14px;border-radius:50%;background:#1685ff;border:3px solid #0a2845}.timeline-item h3{margin:0 0 5px}.timeline-item .dates{color:#4db2ff;font-weight:900;font-size:13px}.timeline-item p{color:#adbed2}
.skill-group{margin-bottom:31px}.skill-group h2{font-size:23px;margin-bottom:13px}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px}.contact-card{background:linear-gradient(180deg,rgba(12,37,66,.92),rgba(9,27,46,.92));border:1px solid var(--line);border-radius:18px;padding:31px}.contact-list{display:grid;gap:14px;margin-top:22px}.contact-list a{color:#62bbff}.form{display:grid;gap:14px}.form input,.form textarea{width:100%;background:#0a1c31;color:white;border:1px solid #2a4b6c;border-radius:10px;padding:13px 14px;font:inherit}.form textarea{min-height:165px}.notice{padding:12px 14px;border-radius:8px;margin-bottom:15px}.notice.ok{background:#103a2c;color:#9ef0c9}.notice.bad{background:#401f27;color:#ffb2b2}
.footer{border-top:1px solid #183855;background:#04101f;color:#a6b8cd;padding:30px 0}.footer-inner{display:flex;justify-content:space-between;gap:20px;align-items:center}.footer-links{display:flex;gap:18px}
.empty{padding:20px;border:1px dashed #315579;border-radius:12px;color:var(--muted)}
/* Admin */
.admin-body{background:#eef3f8;color:#17263a}.admin-wrap{width:min(1180px,calc(100% - 30px));margin:auto}.admin-top{background:#061426;color:white;padding:14px 0}.admin-top-inner{display:flex;justify-content:space-between;align-items:center}.admin-nav{display:flex;gap:14px;flex-wrap:wrap}.admin-main{padding:28px 0}.admin-card{background:white;border:1px solid #d8e2ee;border-radius:12px;padding:22px;margin-bottom:20px;box-shadow:0 7px 20px rgba(20,45,70,.05)}.admin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.stat{background:#f7f9fc;border:1px solid #e0e8f1;border-radius:10px;padding:18px}.admin-form{display:grid;gap:13px}.admin-form label{font-weight:700}.admin-form input,.admin-form textarea,.admin-form select{width:100%;padding:11px 12px;border:1px solid #cbd7e5;border-radius:7px;font:inherit;background:white;color:#18243a}.admin-form textarea{min-height:145px}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:10px;border-bottom:1px solid #e4eaf1;vertical-align:top}.table th{font-size:12px;text-transform:uppercase;color:#62748b}.admin-actions{display:flex;gap:8px;flex-wrap:wrap}.danger{background:#c84040;border-color:#c84040}.login-box{width:min(460px,calc(100% - 30px));margin:80px auto;background:white;color:#18243a;padding:30px;border-radius:14px}
@media(max-width:1024px){.cards{grid-template-columns:repeat(2,1fr)}.hero-metrics{grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.nav{display:none;position:absolute;top:72px;left:0;right:0;background:#061426;padding:20px;flex-direction:column;align-items:flex-start}.nav.open{display:flex}.menu-toggle{display:block}.header-cv{display:none}.features{grid-template-columns:1fr 1fr}.feature:nth-child(2){border-right:0}.about-grid,.contact-grid,.project-detail{grid-template-columns:1fr}.project-detail img{min-height:240px}.admin-grid{grid-template-columns:1fr}}
@media(max-width:620px){.container{width:min(var(--max),calc(100% - 28px))}.hero{min-height:620px}.hero h1{font-size:44px}.features,.cards,.check-grid,.hero-metrics{grid-template-columns:1fr}.feature{border-right:0;border-bottom:1px solid #173653}.section{padding:58px 0}.footer-inner{flex-direction:column;align-items:flex-start}.header-inner{height:64px}.nav{top:64px}.page-hero h1{font-size:42px}.hero-content{padding:72px 0}.about-visual{min-height:320px}}

.language-switch{display:inline-flex;align-items:center;gap:7px;margin-left:-8px;padding-left:10px;border-left:1px solid rgba(255,255,255,.14)}
.flag-link{font-size:22px;line-height:1;padding:4px 5px;border-radius:7px;opacity:.62;filter:saturate(.82);transition:.18s;display:inline-flex;align-items:center;justify-content:center}
.flag-link:hover,.flag-link.selected{opacity:1;filter:none;background:rgba(43,142,245,.15);box-shadow:0 0 0 1px rgba(75,166,255,.22)}
@media(max-width:900px){.language-switch{margin-left:0;padding-left:0;border-left:0;border-top:1px solid rgba(255,255,255,.12);padding-top:14px;width:100%}}

.cv-alt-link{font-size:13px;color:#9fc8ed!important;margin-top:-4px}


/* V2 page visuals: Experience, Skills, Contact */
.page-visual-section{
  padding:0;
  margin-top:-68px;
  position:relative;
  z-index:2;
}
.section-after-visual{padding-top:34px}
.page-visual{
  width:100%;
  min-height:265px;
  border:1px solid #204b78;
  border-radius:22px;
  background-position:center;
  background-size:cover;
  background-repeat:no-repeat;
  box-shadow:0 22px 55px rgba(0,0,0,.24);
  overflow:hidden;
}
.experience-visual{
  background-image:
    linear-gradient(90deg,rgba(4,17,31,.28),rgba(4,17,31,.05)),
    url('../images/experience-v2.png');
  background-position:center 48%;
}
.skills-visual{
  background-image:
    linear-gradient(90deg,rgba(4,17,31,.10),rgba(4,17,31,.04)),
    url('../images/skills-v2.png');
  background-position:center 45%;
}
.contact-visual{
  min-height:245px;
  border:1px solid #204b78;
  border-radius:18px 18px 0 0;
  background:
    linear-gradient(90deg,rgba(5,18,34,.20),rgba(5,18,34,.04)),
    url('../images/contact-v2.png') center/cover no-repeat;
  box-shadow:0 15px 35px rgba(0,0,0,.18);
}
.contact-card-under-visual{
  border-top:0;
  border-radius:0 0 18px 18px;
}
@media(max-width:900px){
  .page-visual-section{margin-top:-48px}
  .section-after-visual{padding-top:28px}
  .page-visual{min-height:220px}
  .contact-visual{min-height:260px}
}
@media(max-width:620px){
  .page-visual-section{margin-top:-18px}
  .section-after-visual{padding-top:24px}
  .page-visual{min-height:180px;border-radius:16px}
  .contact-visual{min-height:220px}
}


/* About professional portrait */
.about-portrait{
  min-height:430px;
  border-radius:22px;
  border:1px solid rgba(115,168,220,.22);
  box-shadow:0 25px 70px rgba(0,0,0,.28);
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 28% 18%, rgba(50,120,220,.18), transparent 28%),
    radial-gradient(circle at 78% 22%, rgba(17,77,170,.14), transparent 26%),
    linear-gradient(135deg,#051426 0%,#0a1f3a 52%,#08192d 100%);
}
.about-portrait:before{
  content:"";
  position:absolute;
  inset:18px;
  border-radius:18px;
  background:url('../images/konstantinos-portrait-v2.png') center center/contain no-repeat;
  filter:drop-shadow(0 18px 36px rgba(0,0,0,.22));
}
.about-portrait:after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,0) 22%,rgba(6,20,38,.10) 100%);
  pointer-events:none;
}
@media(max-width:900px){
  .about-portrait{min-height:390px}
  .about-portrait:before{inset:16px}
}
@media(max-width:620px){
  .about-portrait{min-height:330px;border-radius:16px}
  .about-portrait:before{inset:12px;border-radius:12px}
}