styles.css

/* =========================
   Global Reset & Variables
   ========================= */
*,
*::before,
*::after { box-sizing: border-box; }

:root {
  --bg: #ffffff;
  --bg-muted: #f5f5f5;
  --fg: #1a1a1a;
  --fg-soft: #333333;
  --accent: #007bff;
  --header-bg: #2f2f2f;
  --header-fg: #ffffff;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(0,0,0,.12);
  --maxw: 1600px;
  --space: 20px;
  --h2-size: 1.5rem;
  --text: 1rem;
  --small: 0.9rem;
  --header-h: 64px; /* ύψος header για offset */

  /* Background options */
  --bg-overlay: 0.30;                    /* 0 = χωρίς gradient, 0.15–0.28 sweet spot */
  --bg-image: url("images/background.jpg?v=2");/* άλλαξέ το αν το αρχείο σου έχει άλλο όνομα/path */
  --card-bg: rgba(255,255,255,0.94);      /* ημιδιάφανα sections/cards (βάλε #fff αν δεν θες) */

  /* Fonts */
  --font-main: Arial, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-mono: "Courier New", Courier, monospace;
}

html, body { height: 100%; margin: 0; padding: 0; }

/* =================
   Body (image bg)
   ================= */
body {
  font-family: var(--font-main);
  line-height: 1.6;
  color: var(--fg);

  /* Εικόνα φόντου + προαιρετικό overlay για αντίθεση */
  background:
    linear-gradient(rgba(0,0,0,var(--bg-overlay)), rgba(0,0,0,var(--bg-overlay))),
    var(--bg-image) center center / cover no-repeat fixed;
  background-color: #0f0f10; /* fallback αν αποτύχει η εικόνα */

  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* iOS/μικρές οθόνες: προτίμησε scroll (fixed έχει issues) */
@media (max-width: 900px) {
  body { background-attachment: scroll; }
}

/* =================
   Header / Navbar
   ================= */
header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 calc(var(--space) * 1.2);
  background-color: var(--header-bg);
  color: var(--header-fg);
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.logo {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .3px;
}

.navbar ul {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar a {
  color: var(--header-fg);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: color .2s ease, opacity .2s ease;
}

.navbar a:hover { color: #f0f0f0; opacity: .95; }

/* ==============
   Main wrapper
   ============== */
main {
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: calc(var(--header-h) + 1.5rem) var(--space) 2rem;
  flex: 1;
}

/* “Κάρτα” γύρω από το περιεχόμενο */
.container {
  background-color: var(--card-bg);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 2rem;
}

/* =================
   Sections & Titles
   ================= */
section {
  background: var(--card-bg); /* ίδια διαφάνεια με container */
  border-radius: 8px;
  padding: 2rem 1.25rem;
  margin: 0 0 1.5rem 0;

  /* για anchors: να μην τα καλύπτει ο fixed header */
  scroll-margin-top: calc(var(--header-h) + 16px);
}

#about { background-color: var(--bg-muted); }

section h2 {
  text-align: center;
  text-transform: uppercase;
  margin: 0 0 1rem 0;
  letter-spacing: .8px;
  font-weight: 800;
  color: #222;
  font-size: var(--h2-size);
  border-bottom: 2px solid #e6e6e6;
  padding-bottom: .6rem;
}

/* =========================
   Section-specific Type
   ========================= */
#about h2, #about p {
  font-family: var(--font-serif);
  font-style: italic;
  text-align: center;
  letter-spacing: .3px;
  color: #444;
}

#projects h2, #projects li {
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.7;
  color: #1a1a1a;
}

#projects li a { font-weight: bold; }

#education h2 {
  text-align: center;
  font-size: var(--h2-size);
  color: #222;
}

#education .school-entry {
  margin-bottom: 1.2rem;
  padding-bottom: .9rem;
  border-bottom: 1px solid #e9e9e9;
}

#education b a {
  display: block;
  text-align: center;
  margin: .9rem 0 .6rem;
  font-size: 1.06rem;
  font-weight: 800;
  color: #000;
  text-decoration: none;
}

#education b a:hover { color: #333; text-decoration: underline; }

#education p {
  font-size: 0.95rem;
  text-align: justify;
  color: #333;
  margin-bottom: .75rem;
  line-height: 1.6;
}

#education ul { padding-left: 1.25rem; margin-bottom: .9rem; }

#education li {
  font-size: 0.95rem;
  margin-bottom: .5rem;
  line-height: 1.5;
}

#education li a { color: #333; text-decoration: none; }
#education li a:hover { text-decoration: underline; }

/* ===== Links ===== */
#links { text-align: center; }
#links a { font-weight: bold; font-size: 0.95rem; color: #000; }

/* ===============
   Footer
   =============== */
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: .8rem;
  width: 100%;
  border-top: 1px solid rgba(255,255,255,.08);
}

/* ==================
   General Link Styles
   ================== */
a {
  color: #000;
  transition: color .2s ease-in, text-decoration-color .2s ease-in;
  text-decoration: none;
}

a:hover,
b a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

li a:hover { text-decoration: none; }

/* ======================
   Icons & Email Button
   ====================== */
.fas.fa-envelope { font-size: 1.5rem; color: #000; }

.email-button {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem .75rem;
  background-color: var(--bg);
  color: #000;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid #000;
  transition: background-color .25s ease, color .25s ease, transform .08s ease;
}

.email-button:hover {
  background-color: #f0f0f0;
  color: #000;
  text-decoration: none;
  transform: translateY(-1px);
}

/* ===============
   Icon Row
   =============== */
.links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin: 30px 0 10px;
  flex-wrap: wrap;
}

.icon-img { width: 35px; height: auto; display: block; }

/* ===============
   Lists in projects
   =============== */
#projects ul { margin: 0; padding-left: 1.25rem; }
#projects li { margin: .4rem 0; }

/* ===============
   Accessibility helpers
   =============== */
:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; }

/* =================
   Responsive
   ================= */
@media (max-width: 1024px) {
  :root { --h2-size: 1.35rem; }
  main { padding: calc(var(--header-h) + 1.2rem) 16px 1.6rem; }
}

@media (max-width: 768px) {
  header {
    padding: 0 14px;
    height: auto;
    min-height: var(--header-h);
    align-items: flex-start;
    gap: 8px;
    padding-block: 10px;
  }

  .navbar ul {
    flex-wrap: wrap;
    gap: 12px 16px;
    justify-content: flex-start;
  }

  main { padding: calc(var(--header-h) + 1rem) 14px 1.2rem; }
  section h2 { font-size: 1.25rem; }

  #education li,
  #projects li,
  #about p,
  #links a {
    font-size: 0.95rem;
    line-height: 1.5;
  }

  #education b a { font-size: 1rem; }

  .links { flex-direction: column; gap: 14px; }
  .email-button { font-size: 0.9rem; padding: .45rem .7rem; }
  .icon-img { width: 28px; }
}

/* ============
   Print (nice)
   ============ */
@media print {
  header, footer { display: none !important; }
  main { padding: 0 !important; }
  .container, section {
    box-shadow: none !important;
    border-radius: 0 !important;
    background: #fff !important;
  }
}