/* ==========================================================================
   STYLE.CSS - Κεντρικό Αρχείο Εμφάνισης (Refactored)
   ========================================================================== */

/* 1. CSS VARIABLES (Κεντρικός Έλεγχος Χρωμάτων & Διαστάσεων) */
:root {
    /* Σκούρο Θέμα (Default Dark Theme) */
    --bg-color: #050505;
    --text-color: #ffffff;
    --text-grey: #888888;
    --text-muted: #666666;
    --accent-line: rgba(255, 255, 255, 0.15);
    --cv-container-bg: #ffffff;
    --cv-text-color: #050505;
    --cv-card-bg: rgba(255, 255, 255, 0.8);
    --cv-card-border: rgba(0, 0, 0, 0.08);
    --nav-height: 140px;
}

/* Ρυθμίσεις για όταν η σελίδα έχει Light Theme */
body[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #050505;
    --text-grey: #555555;
    --text-muted: #777777;
    --accent-line: rgba(0, 0, 0, 0.1);
}

/* 2. RESET & BASE STYLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    width: 100%;
    height: 100%;
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden; /* Κλειδώνει το scroll στο κυρίως body για να δουλέψει σωστά το εσωτερικό scroll */
}

/* Καμβάς διαδραστικού φόντου */
#bg-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* 3. TRANSITION ANIMATIONS (Theme Morphing) */
@keyframes morphToWhite {
    0% { background-color: #050505; color: #ffffff; }
    100% { background-color: #ffffff; color: #050505; }
}

@keyframes morphToBlack {
    0% { background-color: #ffffff; color: #050505; }
    100% { background-color: #050505; color: #ffffff; }
}

.animate-bg {
    animation: morphToWhite 2s ease-in-out forwards;
}

.animate-bg-dark {
    animation: morphToBlack 2s ease-in-out forwards;
}

/* 4. NAVIGATION BAR (Top Nav) */
.top-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 40px 0;
    z-index: 10;
    display: flex;
    justify-content: center;
    transition: transform 0.3s ease-in-out;
}

.top-nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
}

.top-nav a {
    text-decoration: none;
    color: var(--text-grey);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding-bottom: 5px;
    position: relative;
    transition: color 0.3s ease;
}

.top-nav a:hover,
.top-nav a.active {
    color: var(--text-color);
}

/* Εφέ γραμμής κάτω από τα links */
.top-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 50%;
    background-color: var(--text-color);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.top-nav a:hover::after,
.top-nav a.active::after {
    width: 100%;
}

/* 5. ΔΟΜΗ ΣΕΛΙΔΩΝ (Hero & Layouts) */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    padding: 20px;
}

.content-page {
    position: relative;
    width: 100%;
    height: 100vh;
    z-index: 2;
    overflow-y: auto;
    padding-top: var(--nav-height);
    padding-bottom: 80px;
    scrollbar-width: none; /* Απόκρυψη scrollbar σε Firefox */
}

.content-page::-webkit-scrollbar {
    display: none; /* Απόκρυψη scrollbar σε Chrome/Safari */
}

.content-container {
    max-width: 750px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: left;
}

/* 6. ΤΥΠΟΓΡΑΦΙΑ & ΣΤΟΙΧΕΙΑ ΣΕΛΙΔΩΝ */
.name {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 10px;
}

.title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-grey);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.description {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.6;
    color: #cccccc;
    transition: color 0.3s ease;
}

body[data-theme="light"] .description {
    color: #444444;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: center;
    letter-spacing: -1px;
    font-weight: 700;
}

.placeholder-text {
    text-align: center;
    color: var(--text-muted);
    font-weight: 300;
    margin-top: 50px;
    font-size: 1.1rem;
}

/* Εικόνα Προφίλ */
.image-container {
    margin-bottom: 25px;
}

.profile-img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.2);
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.5s ease;
}

.profile-img:hover {
    filter: grayscale(0%);
    transform: scale(1.05);
    border-color: var(--text-color);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* 7. ΔΗΜΟΣΙΕΥΣΕΙΣ (Publications) */
.pub-category {
    margin-bottom: 50px;
}

.pub-category h2 {
    font-size: 1.4rem;
    border-bottom: 1px solid var(--accent-line);
    padding-bottom: 10px;
    margin-bottom: 25px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.pub-list {
    list-style: none;
}

.pub-list li {
    margin-bottom: 25px;
    color: var(--text-grey);
    font-size: 0.95rem;
    line-height: 1.6;
    font-weight: 300;
}

.pub-list strong {
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 500;
}

.pub-link {
    color: var(--text-grey);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-block;
    margin-top: 5px;
    transition: color 0.3s ease;
}

.pub-link:hover {
    color: var(--text-color);
}

/* 8. ΨΗΦΙΑΚΟ ΒΙΟΓΡΑΦΙΚΟ (CV Components) */
.cv-digital-container {
    background: var(--cv-container-bg);
    padding: 10px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
    position: relative;
    z-index: 3;
    color: var(--cv-text-color);
}

.cv-section {
    border: 1px solid var(--cv-card-border);
    background: var(--cv-card-bg);
    border-radius: 14px;
    padding: 30px;
    margin-bottom: 30px;
}

.cv-section h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--cv-text-color);
    display: inline-block;
    border-bottom: 2px solid var(--cv-text-color);
    padding-bottom: 3px;
}

.cv-section ul {
    padding-left: 20px;
}

.cv-section li {
    margin-bottom: 12px;
    color: #333333;
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.2;                  
    text-align: justify;
    font-family: 'Ubuntu', sans-serif;
	
}

.cv-section li strong {
    font-weight: 700;
    color: var(--cv-text-color);
}

/* Skills Badges */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.cv-pill.skill {
    background: #ffffff;
    color: #050505;
    border: 1px solid rgba(0, 0, 0, 0.12);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.cv-pill.skill:hover {
    background: #050505;
    color: #ffffff;
    border-color: #050505;
}

/* Download PDF Button */
.download-btn {
    display: inline-block;
    background: var(--cv-text-color);
    color: #ffffff;
    padding: 12px 25px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
    z-index: 4;
}

.download-btn:hover {
    background: #444444;
    transform: translateY(-2px);
}

/* ==========================================================================
   9. MEDIA QUERIES (Προσαρμογή για Κινητά & Tablets)
   ========================================================================== */
@media (max-width: 768px) {
    .name { font-size: 2.2rem; }
    .title { font-size: 0.95rem; letter-spacing: 1.5px; }
    .description { font-size: 0.9rem; }
    .profile-img { width: 140px; height: 140px; }

    .top-nav { padding: 20px 0; }
    .top-nav ul { gap: 25px; }
    .top-nav a { font-size: 0.8rem; letter-spacing: 1px; }

    .page-title { font-size: 2rem; margin-bottom: 20px; }
    .content-page { padding-top: 110px; }

    .cv-digital-container { padding: 15px; }
    .cv-section { padding: 20px; margin-bottom: 20px; }
    .cv-section h3 { font-size: 1.1rem; margin-bottom: 15px; }
    .cv-section li { font-size: 0.85rem; margin-bottom: 10px; }

    .pub-category h2 { font-size: 1.15rem; }
    .pub-list li { font-size: 0.85rem; }
}

/* Native View Transitions (Chrome / Safari Edge Support) */
@view-transition {
    navigation: auto;
}