/* ═══════════════════════════════════════════════════════════
   GreenPoint — stylesheet
   ═══════════════════════════════════════════════════════════ */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --accent-color:  #27ae60;
    --accent-dark:   #219150;
    --text-color:    #333;
    --bg-light:      #f4f4f4;
    --white:         #ffffff;

    /* Ένα σημείο αλήθειας για το ύψος της κεφαλίδας.
       Το χρησιμοποιούν το sticky nav, το scroll-margin και το JS. */
    --header-h: 170px;
    --logo-h:   150px;
}

/* Συρρίκνωση κεφαλίδας μόλις ο χρήστης κατέβει —
   το λογότυπο κρατά την παρουσία του στην πρώτη ματιά,
   αλλά μετά δεν τρώει μισή οθόνη. */
body.scrolled {
    --header-h: 88px;
    --logo-h:   64px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

body.nav-open {
    overflow: hidden;   /* κλείδωμα scroll όσο είναι ανοιχτό το μενού */
}

a {
    text-decoration: none;
    color: inherit;
    transition: color .3s, border-color .3s, background .3s;
}

img, video {
    max-width: 100%;
}

:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* ── Skip link (πληκτρολόγιο / screen reader) ────────────── */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 20px;
    z-index: 3000;
}
.skip-link:focus {
    left: 0;
}

/* ═══════════════════════════════════════════════════════════
   Κεφαλίδα
   ═══════════════════════════════════════════════════════════ */

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    min-height: var(--header-h);
    transition: min-height .25s ease;
}

.nav-left, .nav-right {
    flex: 1;
    display: flex;
    gap: 25px;
    align-items: center;
}

.nav-right { justify-content: flex-end; }

.nav-left a, .nav-right a {
    text-transform: uppercase;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #000;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
}

.nav-left a:hover,
.nav-right a:hover,
.nav-left a[aria-current="page"],
.nav-right a[aria-current="page"] {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

/* Το ΕΝΔΙΑΦΕΡΟΜΑΙ είναι η μοναδική μετατροπή — να ξεχωρίζει */
.nav-right .nav-cta {
    background: var(--accent-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 4px;
    border-bottom: none;
}
.nav-right .nav-cta:hover {
    background: var(--accent-dark);
    color: var(--white);
    border-bottom-color: transparent;
}

.logo-container {
    flex: 0 0 auto;
    margin: 0 20px;
    display: flex;
    align-items: center;
}

.logo-img {
    height: var(--logo-h);
    width: auto;
    display: block;
    transition: height .25s ease;
}

/* ── Κουμπί μενού (μόνο σε κινητά) ───────────────────────── */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    width: 48px;                 /* στόχος αφής ≥44px */
    height: 48px;
    align-items: center;
    justify-content: center;
}

.hamburger-box {
    display: block;
    width: 26px;
    height: 20px;
    position: relative;
}

.hamburger-bar {
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--primary-color);
    transition: transform .3s ease, opacity .2s ease, top .3s ease;
}
.hamburger-bar:nth-child(1) { top: 0; }
.hamburger-bar:nth-child(2) { top: 8.5px; }
.hamburger-bar:nth-child(3) { top: 17px; }

.mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
    top: 8.5px;
    transform: rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
    opacity: 0;
}
.mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
    top: 8.5px;
    transform: rotate(-45deg);
}

/* ── Συρόμενο μενού κινητού ──────────────────────────────── */
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100%;
    background: #1a1a1a;
    color: var(--white);
    z-index: 2000;
    padding: 80px 30px 30px;
    display: flex;
    flex-direction: column;
    gap: 4px;

    /* Κλειστό: εκτός οθόνης ΚΑΙ εκτός σειράς εστίασης */
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .35s ease, visibility .35s;
}

.mobile-nav.open {
    transform: translateX(0);
    visibility: visible;
}

.mobile-nav a {
    display: block;
    color: var(--white);
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 16px 4px;
    border-bottom: 1px solid #333;
}
.mobile-nav a:hover,
.mobile-nav a[aria-current="page"] {
    color: var(--accent-color);
}

.mobile-nav .mobile-nav-cta {
    background: var(--accent-color);
    color: var(--white);
    text-align: center;
    border-radius: 5px;
    border-bottom: none;
    margin-top: 18px;
    padding: 16px;
}
.mobile-nav .mobile-nav-cta:hover {
    background: var(--accent-dark);
    color: var(--white);
}

.mobile-nav-close {
    position: absolute;
    top: 18px;
    right: 20px;
    background: none;
    border: none;
    color: var(--white);
    font-size: 34px;
    line-height: 1;
    cursor: pointer;
    width: 48px;
    height: 48px;
}

.mobile-nav-contact {
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid #333;
}
.mobile-nav-contact a {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0;
    border-bottom: none;
    padding: 8px 4px;
    color: #ccc;
}

.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 1900;
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s ease, visibility .35s;
}
.nav-backdrop.open {
    opacity: 1;
    visibility: visible;
}

/* ═══════════════════════════════════════════════════════════
   Ειδοποίηση & Hero
   ═══════════════════════════════════════════════════════════ */

.site-notice {
    background: #fff8e1;
    color: #7a5c00;
    text-align: center;
    padding: 10px 20px;
    font-size: .9rem;
    border-bottom: 1px solid #f0e2b0;
}

.hero {
    min-height: 60vh;
    background:
        linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
        url('Projects/images/magazi.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding: 60px 20px;
}

.hero h1 {
    font-size: clamp(1.6rem, 5vw, 2.5rem);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero p {
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    max-width: 620px;
    margin: 0 auto;
}

.hero-cta,
.page-cta {
    display: inline-block;
    margin-top: 28px;
    background: var(--accent-color);
    color: var(--white);
    padding: 15px 34px;
    border-radius: 5px;
    font-weight: 700;
    letter-spacing: 1px;
}
.hero-cta:hover,
.page-cta:hover {
    background: var(--accent-dark);
    color: var(--white);
}

/* ═══════════════════════════════════════════════════════════
   Χαρτοφυλάκιο
   ═══════════════════════════════════════════════════════════ */

.portfolio-section {
    padding: 60px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 50%;
    height: 3px;
    background: var(--accent-color);
    margin: 10px auto 0;
}

.empty-state {
    text-align: center;
    color: #888;
    font-style: italic;
    padding: 40px 0;
}

/* ── Πλοήγηση κατηγοριών ──────────────────────────────────
   Κολλάει κάτω από την κεφαλίδα, ώστε το scroll-spy να είναι
   πραγματικά ορατό ενώ ο χρήστης διαβάζει. */
.category-nav-wrapper {
    position: sticky;
    top: var(--header-h);
    z-index: 900;
    background: var(--bg-light);
    margin: 0 -40px 36px;
    padding: 12px 40px;
    border-bottom: 1px solid #e3e3e3;
    transition: top .25s ease;
}

.category-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.cat-btn {
    background-color: #eee;
    color: #555;
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid #ddd;
    white-space: nowrap;
}

.cat-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.cat-btn.active-cat {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* ── Πλέγμα έργων ─────────────────────────────────────────── */
.category-block {
    margin-bottom: 60px;
    scroll-margin-top: calc(var(--header-h) + 70px);
}

.category-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-left: 10px;
    border-left: 5px solid var(--accent-color);
}

.portfolio-grid {
    display: grid;
    gap: 5px;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.project-tile {
    position: relative;
    height: 350px;
    overflow: hidden;
    margin: 0;
    background: #e9e9e9;
}

.project-tile img,
.project-tile video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .5s ease;
}

.project-tile:hover img {
    transform: scale(1.06);
}

.tile-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    color: var(--white);
    padding: 20px;
}

.tile-overlay h4 {
    font-size: 1.05rem;
    text-transform: uppercase;
    font-weight: 600;
    line-height: 1.3;
}

.tile-overlay p {
    font-size: .9rem;
    color: #e8e8e8;
}

/* ═══════════════════════════════════════════════════════════
   Σελίδα «Η Εταιρεία»
   ═══════════════════════════════════════════════════════════ */

.page-content {
    max-width: 1000px;
    margin: 60px auto;
    padding: 40px;
    background: #fff;
    border-radius: 8px;
}

.page-content h1 {
    font-size: clamp(1.6rem, 4vw, 2.5rem);
    color: var(--primary-color);
    margin-bottom: 30px;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 15px;
    display: inline-block;
}

.text-block h2 {
    margin: 34px 0 15px;
    color: var(--primary-color);
    font-size: 1.35rem;
}

.text-block p {
    font-size: 1.05rem;
    margin-bottom: 20px;
    color: #444;
}

.text-block ul {
    margin: 20px 0 20px 24px;
}

.text-block li {
    margin-bottom: 10px;
}

.page-cta-wrap {
    text-align: center;
    margin-top: 10px;
}

/* ═══════════════════════════════════════════════════════════
   Φόρμα ενδιαφέροντος
   ═══════════════════════════════════════════════════════════ */

.interest-section {
    padding: 70px 20px 60px;
    background: #f4f6f4;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.interest-section h1 {
    font-size: clamp(1.4rem, 4vw, 2rem);
    letter-spacing: 2px;
    margin-bottom: 8px;
    color: #1a1a1a;
    text-align: center;
}

.interest-section .subtitle {
    color: #555;
    margin-bottom: 36px;
    text-align: center;
}

.form-card {
    width: 100%;
    max-width: 620px;
    background: #fff;
    padding: 40px 36px;
    border-radius: 10px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 7px;
    color: #333;
    font-size: .93rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;          /* ≥16px: το iOS δεν κάνει zoom στο focus */
    font-family: inherit;
    color: #222;
    background: #fafafa;
    transition: border-color .2s, background .2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(39,174,96,.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

.req { color: #c0392b; }

.contact-block {
    background: #f0f7f0;
    border-left: 4px solid var(--accent-color);
    border-radius: 5px;
    padding: 18px 18px 4px;
    margin-bottom: 22px;
}

.contact-block .block-hint {
    margin: 0 0 14px;
    font-size: .88rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Honeypot: εκτός οθόνης αλλά ΟΧΙ display:none —
   πολλά bots αγνοούν τα display:none πεδία. */
.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.submit-btn {
    width: 100%;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 15px;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 5px;
    transition: background .25s, transform .1s;
    margin-top: 6px;
}
.submit-btn:hover  { background: var(--accent-dark); }
.submit-btn:active { transform: scale(.98); }

.form-privacy {
    font-size: .8rem;
    color: #888;
    margin-top: 16px;
    text-align: center;
}

.msg-box {
    padding: 14px 18px;
    margin-bottom: 24px;
    border-radius: 5px;
    font-weight: 600;
    font-size: .95rem;
    text-align: center;
}
.msg-box.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.msg-box.error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

/* ═══════════════════════════════════════════════════════════
   Υποσέλιδο
   ═══════════════════════════════════════════════════════════ */

footer {
    background: #111;
    color: #fff;
    padding: 40px;
    margin-top: 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 30px;
    border-bottom: 1px solid #333;
    padding-bottom: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-info h2 {
    font-size: 1.25rem;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.footer-info address {
    font-style: normal;
    font-size: .95rem;
    color: #ccc;
}
.footer-info a:hover { color: var(--accent-color); }

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: .95rem;
    color: #ccc;
}
.footer-nav a:hover { color: var(--accent-color); }

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    color: #fff;
    border: 1px solid #555;
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.social-links a:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.copyright {
    margin-top: 20px;
    font-size: 12px;
    color: #777;
    text-align: center;
}

/* ═══════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 900px) {
    :root      { --header-h: 96px;  --logo-h: 70px; }
    body.scrolled { --header-h: 76px; --logo-h: 54px; }

    /* Τα desktop links κρύβονται — ΑΛΛΑ τώρα υπάρχει
       πραγματικό κουμπί μενού που τα αντικαθιστά. */
    .nav-left, .nav-right { display: none; }

    .main-header {
        justify-content: center;
        padding: 8px 16px;
    }

    .mobile-toggle {
        display: flex;
        position: absolute;
        right: 12px;
        top: 50%;
        transform: translateY(-50%);
    }

    .logo-container { margin: 0; }

    .portfolio-section { padding: 40px 16px; }

    .category-nav-wrapper {
        margin: 0 -16px 28px;
        padding: 10px 16px;
    }

    /* Μία σειρά που κυλάει οριζόντια, αντί για 4 σειρές κουμπιών */
    .category-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }
    .category-nav::-webkit-scrollbar { display: none; }

    .page-content { margin: 30px 16px; padding: 28px 20px; }

    footer { padding: 30px 20px; }
    .footer-content { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 600px) {
    .portfolio-grid { grid-template-columns: 1fr; }
    .project-tile   { height: 260px; }
    .form-card      { padding: 28px 18px; }
    .interest-section { padding: 40px 14px; }
}

/* Σεβασμός στην προτίμηση του χρήστη για λιγότερη κίνηση */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}