/* --- Global Styles & Typography --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-color: #10363c;
  --panel-color: #134047;
  --border-color: #46c4b5;;
  --text-color: #fff;
  --text-muted: #b7c7cc;
  --primary-color: #f26aa0;
  --primary-hover: #f26aa0;
  --success-color: #198754;
  --danger-color: #dc3545;
}

/* Prevent layout blowouts */
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
img, svg, video, canvas, audio, iframe, embed, object { display: block; max-width: 100%; }
img { height: auto; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  font-size: 1.16em;
  line-height: 1.4;
  overflow-x: hidden; /* prevent horizontal scroll if something overflows */
  word-wrap: break-word;
}

/* --- Logo Container Style --- */
.logo-container {
    background-color: var(--bg-color);
    text-align: center;
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1001;
}

.logo-container img {
    max-height: 80px;
}

/* --- Navigation Header --- */
.main-header {
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0 2rem;
  position: ;
  top: 120px; left: 0;
  width: 100%;
  z-index: 1100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  gap: 0.75rem;
  overflow: visible; /* allow dropdowns/menus to show */
}

.logo { display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.logo img { max-height: 40px; width: auto; }

.nav-links { display: flex; align-items: center; min-width: 0; }
.main-nav, .user-actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.main-nav a, .user-actions a {
  margin: 0 1rem;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.2s ease;
  white-space: nowrap; /* keep nav items single-line */
}
.main-nav a:hover, .user-actions a:hover { color: var(--primary-color); }
.user-actions .btn { padding: 0.5rem 1rem; }

/* --- Buttons --- */
.btn {
  display: inline-block;
  width: auto;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.2s ease, transform 0.1s ease;
}
.btn:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background-color: #6c757d; }
.btn-secondary:hover { background-color: #5a6268; }

/* --- Hamburger Menu --- */
.nav-toggle {
  display: none;
  cursor: pointer;
  border: none;
  background: transparent;
  padding: 10px;
  margin-left: 0.5rem;
  z-index: 1200;
  line-height: 1;
  border-radius: 6px;
  -webkit-tap-highlight-color: transparent;
}
.hamburger {
  display: block;
  position: relative;
  width: 26px;
  height: 3px;
  background: #222;
  transition: all 0.2s ease-in-out;
  border-radius: 2px;
}
.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 26px;
  height: 3px;
  background: #222;
  transition: all 0.2s ease-in-out;
  border-radius: 2px;
}
.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* Animated "X" state */
.nav-toggle[aria-expanded="true"] .hamburger { background: transparent; }
.nav-toggle[aria-expanded="true"] .hamburger::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .hamburger::after  { bottom: 0; transform: rotate(-45deg); }

/* --- Main Content Layout --- */
.wrapper { width: 90%; max-width: 800px; margin: 2rem auto; }
.auth-wrapper { max-width: 450px; }

/* --- Card Styles --- */
.card {
  background-color: var(--panel-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.04);
}
.card h1, .card h2 {
  margin-top: 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

/* --- Forms & Inputs --- */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
}
.error { color: var(--danger-color); font-size: 0.9em; margin-top: 5px; }
.form-group > .btn { width: 100%; }

/* --- Dashboard Specific Styles --- */
.dashboard-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; }
.post-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex; justify-content: space-between; align-items: center;
}
.post-item:last-child { border-bottom: none; }
.post-item h3 { margin: 0; font-weight: 500; font-size: 1.6em; }
.post-item a { text-decoration: none; color: var(--text-color); transition: color 0.2s ease; }
.due-item { border-left: 4px solid var(--success-color); padding-left: 1rem; margin-left: -1rem; }
.post-actions a { font-size: 0.9em; margin-left: 1rem; text-decoration: none; }
.edit-btn { color: var(--primary-color); }
.delete-btn { color: var(--danger-color); }

/* --- Category & Tag Styles --- */
.post-meta { margin-top: 0.5rem; margin-bottom: 0.5rem; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.category-badge, .tag-badge {
  display: inline-block; padding: 0.25rem 0.6rem; font-size: 0.75rem; font-weight: 600; border-radius: 1rem; line-height: 1;
}
.category-badge { background-color: #e9ecef; color: #495057; }
.tag-badge { color: #fff; }
.tag-group { display: flex; flex-wrap: wrap; gap: 1rem; }
.tag-group label { font-weight: normal; display: flex; align-items: center; gap: 0.3rem; }
.tag-easy { background-color: #198754; }
.tag-intermediate { background-color: #ffc107; color: #000; }
.tag-hard { background-color: #fd7e14; }
.tag-urgent { background-color: #dc3545; }
.tag-not-urgent { background-color: #6c757d; }

/* --- Study Page & Editor Styles --- */
.post-content { line-height: 1.7; }
.post-content h1, .post-content h2, .post-content h3 {
  border-bottom: 1px solid #eee; padding-bottom: 0.3em; margin-top: 1.5em;
}
.post-content img {
  max-width: 100%; height: auto; display: block; margin: 1.5rem auto;
  border-radius: 8px; box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.post-content audio { width: 100%; margin: 1.5rem 0; }
.ql-editor { font-family: 'Inter', sans-serif; font-size: 16px; line-height: 1.7; color: black; }

/* --- Dashboard Post Link Styles --- */
.post-item h3 a {
  color: var(--primary-color);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
.post-item h3 a:hover { color: var(--primary-hover); }

/* --- AI Chat Box Styles --- */
.ai-chat-box { margin-top: 2rem; }
.api-key-section {
  display: flex; gap: 0.5rem; align-items: center;
  margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-color);
}
.api-key-section label { margin-bottom: 0; }
.api-key-section input { flex-grow: 1; }
.chat-history {
  height: 300px; overflow-y: auto; border: 1px solid var(--border-color);
  border-radius: 5px; padding: 1rem; margin-bottom: 1rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.user-message {
  background-color: var(--primary-color); color: #fff;
  padding: 0.75rem 1rem; border-radius: 10px; max-width: 80%; line-height: 1.5; align-self: flex-end;
}
.ai-message {
  padding: 0;
  background-color: transparent;
  max-width: 100%;
  line-height: 1.6;
  align-self: flex-start;
}
.ai-thinking { font-style: italic; color: var(--text-muted); align-self: flex-start; }
.chat-form { display: flex; gap: 0.5rem; }
.chat-form input { flex-grow: 1; }
.chat-form select {
  background-color: #fff; border: 1px solid #ccc; border-radius: 5px; padding: 0 0.5rem;
}

/* --- Notification Styles --- */
.notification-area { position: relative; display: flex; align-items: center; }
.notification-bell {
  background: none; border: none; cursor: pointer; position: relative; color: var(--text-muted); padding: 0.5rem;
}
.notification-bell:hover { color: var(--primary-color); }
.notification-badge {
  position: absolute; top: 0; right: 0; width: 18px; height: 18px;
  background-color: var(--danger-color); color: white; border-radius: 50%;
  font-size: 11px; font-weight: 700; display: flex; justify-content: center; align-items: center; line-height: 1;
}
.notification-dropdown {
  display: none; position: absolute; top: 100%; right: 0; margin-top: 10px;
  background-color: var(--panel-color); border: 1px solid var(--border-color);
  border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); width: 300px; z-index: 1100;
}
.notification-dropdown.show { display: block; }
.dropdown-header { padding: 0.75rem 1rem; font-weight: 600; border-bottom: 1px solid var(--border-color); }
.dropdown-item {
  display: block; padding: 0.75rem 1rem; color: var(--text-color); text-decoration: none;
  border-bottom: 1px solid var(--border-color); transition: background-color 0.2s ease;
}
.dropdown-item:last-child { border-bottom: none; }
.dropdown-item:hover { background-color: var(--bg-color); }
.dropdown-item.empty { color: var(--text-muted); font-style: italic; }

/* --- Filter Form Styles --- */
.filter-form {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end;
  padding: 1rem; margin-bottom: 2rem; background-color: var(--bg-color);
  border: 1px solid var(--border-color); border-radius: 8px;
}
.filter-form .form-group { flex-grow: 1; margin-bottom: 0; }
.filter-form .btn { flex-shrink: 0; height: 48px; }

/* --- Empty State Styles --- */
.empty-state {
  text-align: center; padding: 3rem 1rem; border: 2px dashed var(--border-color);
  border-radius: 8px; margin-top: 2rem;
}
.empty-state-icon { font-size: 3rem; color: var(--border-color); margin-bottom: 1rem; }
.empty-state h3 { margin: 0 0 0.5rem 0; font-size: 1.2rem; }
.empty-state p { color: var(--text-muted); margin-bottom: 1.5rem; }
.empty-state .btn { width: auto; }

/* --- Responsive Menu & Layout --- */
@media (max-width: 1200px) {
  .header-content { padding-left: 0; padding-right: 0; }
}

@media (max-width: 992px) {
  #body { padding-top: 100px; }
  .logo-container { top: 0; }
  .main-header { top: 40px; }

  /* Show hamburger */
  .nav-toggle {
    display: block;
    background-color: rgba(0,0,0,0.05);
  }

  /* Stack and toggle nav */
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background-color: var(--panel-color);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    flex-direction: column; align-items: stretch;
    border-top: 1px solid var(--border-color);
  }
  .nav-links.nav-open { display: flex; }
  .main-nav, .user-actions { flex-direction: column; width: 100%; flex-wrap: nowrap; }
  .main-nav a, .user-actions a {
    padding: 1rem; margin: 0; text-align: center; border-bottom: 1px solid var(--border-color);
  }
  .user-actions .btn { margin: 1rem; width: calc(100% - 2rem); }

  /* Layout adjustments */
  .dashboard-grid { grid-template-columns: 1fr; }
  .wrapper { width: 94%; }
}

@media (max-width: 576px) {
  body { font-size: 1.1em; }            /* slightly smaller base text to fit */
  .header-content { height: 56px; }
  .hamburger, .hamburger::before, .hamburger::after { width: 24px; }
  .hamburger::before { top: -7px; }
  .hamburger::after { bottom: -7px; }
  .main-nav a, .user-actions a { font-size: 0.95rem; }
  .card { padding: 1.25rem; }
}

/* Olvashatósági alapok: kényelmes méret, sorhossz, ritmus */
:root {
    --lh-body: 1.6;
    /* folyószöveg sor-magasság */
    --lh-tight: 1.35;
    /* rövid promptokhoz, címekhez */
    --max-ch: 68ch;
    /* ideális sorhossz hosszabb szövegre */
    --para-gap: 0.9rem;
    /* bekezdésköz (nagyobb, mint a sorköz) */
    --focus-ring: #ffe082;
    /* sötét témán jól látható fókusz */
}

/* Alap betűk és rendering */
body {
    line-height: var(--lh-body);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Tartalmi konténer a hosszabb szöveghez */
.readable,
.prose {
    max-width: var(--max-ch);
    margin-inline: auto;
    padding-inline: clamp(16px, 4vw, 24px);
    overflow-wrap: anywhere;
    hyphens: auto;
}

/* Vertikális ritmus: minden testvér között stabil távolság */
.prose>*+* {
    margin-top: 0.8rem;
}

/* Címek hierarchiája súllyal, nem rikító színnel */
h1,
h2,
h3,
h4 {
    line-height: 1.2;
    letter-spacing: .2px;
    margin: 0;
}

h1 {
    font-weight: 700;
    font-size: clamp(1.9rem, 4.5vw, 2.4rem);
    margin-top: 0.8rem;
}

h2 {
    font-weight: 600;
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    margin-top: 1.1rem;
}

h3 {
    font-weight: 600;
    font-size: clamp(1.15rem, 2.4vw, 1.3rem);
    margin-top: 1rem;
}

/* Bekezdések: nagyobb bekezdésköz a gyors szkenneléshez */
p {
    margin: var(--para-gap) 0;
}

/* Másodlagos szöveg – kontraszt csökkentve, de jól olvasható */
.muted,
.text-muted {
    color: var(--text-muted);
}
/* Linkek: diszkrét alap, jól látható hover/focus */
a {
    color: inherit;
    text-decoration-color: rgba(255, 255, 255, .35);
    text-underline-offset: 3px;
    text-decoration-thickness: 1.5px;
    transition: color .16s ease, text-decoration-color .16s ease;
}

a:hover {
    text-decoration-color: currentColor;
    color: var(--primary-color);
}

/* Egységes fókuszgyűrű minden interaktív elemre (AA kompatibilis) */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
    border-radius: 6px;
}

/* Panel/kártya: alacsony csillogás, jó kontraszt, kényelmes padding */
.card,
.panel {
    background-color: var(--panel-color);
    border: 1px solid color-mix(in oklab, var(--text-color) 18%, transparent);
    border-radius: 12px;
    padding: clamp(16px, 3vw, 24px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, .22);
}

/* Kártya címek: aláhúzás helyett finom határvonal */
.card h1,
.card h2 {
    border-bottom: 1px solid color-mix(in oklab, var(--text-color) 18%, transparent);
    padding-bottom: 0.6rem;
    margin-bottom: 1rem;
}

/* Listák: tiszta spacing */
ul,
ol {
    margin: 0.8rem 0 0.8rem 1.2rem;
    padding: 0;
}

li {
    margin: 0.35rem 0;
}

/* Kiemelt blokkok: háttérszalagos highlight, nem rikító */
.highlight {
    background: linear-gradient(90deg,
            color-mix(in oklab, var(--primary-color) 18%, transparent),
            transparent 60%);
    border-left: 3px solid color-mix(in oklab, var(--primary-color) 60%, transparent);
    padding: 10px 12px;
    border-radius: 8px;
}

/* Kód és billentyű jelölések olvashatóan */
code,
kbd,
pre,
samp {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.95em;
}

kbd {
    border: 1px solid color-mix(in oklab, var(--text-color) 35%, transparent);
    background: color-mix(in oklab, var(--text-color) 10%, transparent);
    padding: 2px 6px;
    border-radius: 6px;
    color: var(--text-color);
}

/* Inputok: sötét témára optimalizálva, stabil sor-magasság */
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group select,
.chat-form input,
.chat-form select,
input,
textarea,
select {
    color: var(--text-color);
    background: color-mix(in oklab, var(--text-color) 8%, transparent);
    border: 1px solid color-mix(in oklab, var(--text-color) 22%, transparent);
    border-radius: 10px;
    padding: 10px 12px;
    line-height: 1.45;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

/* Gombok: kontrasztvédett, nem rikító hover */
.btn {
    border-radius: 999px;
    padding: 0.75rem 1.2rem;
    font-weight: 700;
    transition: background-color .16s ease, transform .06s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

/* Cikk olvashatóság: sorhossz és ritmus a meglévő .post-content-hez */
.post-content {
    line-height: var(--lh-body);
    max-width: var(--max-ch);
    margin-inline: auto;
}

.post-content p {
    margin: var(--para-gap) 0;
}

.post-content h1,
.post-content h2,
.post-content h3 {
    border-bottom: 1px solid color-mix(in oklab, var(--text-color) 14%, transparent);
    padding-bottom: 0.35em;
    margin-top: 1.2em;
}

.post-content img {
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, .25);
}

.post-content figcaption,
.caption {
    color: var(--text-muted);
    font-size: .95rem;
    margin-top: 6px;
}

/* Navigációs linkek: jobb kontraszt sötét témán */
.main-nav a,
.user-actions a {
    color: color-mix(in oklab, var(--text-color) 75%, var(--text-muted));
}

.main-nav a:hover,
.user-actions a:hover {
    color: var(--primary-color);
}

/* Hamburger csíkok sötét témához igazítva */
.hamburger,
.hamburger::before,
.hamburger::after {
    background: color-mix(in oklab, var(--text-color) 85%, black);
}

/* Ambient dim az olvasó/gyakorló nézethez (ha van overlay-ed) */
.dim {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .4);
    opacity: 0;
    pointer-events: none;
    transition: opacity .18s ease;
}

.dim.on {
    opacity: 1;
    pointer-events: auto;
}

/* Általános átmenetek és reduced-motion tisztelete */
:root {
    --ease: cubic-bezier(.2, .7, .2, 1);
    --dur: 160ms;
}

* {
    transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
}

/* Opcionális: olvasó mód kapcsoló és dyslexia-barát tipó */
.reading-mode {
    font-size: 1.06em;
    line-height: 1.7;
    letter-spacing: 0.004em;
}

.dyslexia-friendly {
    font-family: "Atkinson Hyperlegible", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans";
    letter-spacing: 0.02em;
    line-height: 1.7;
    word-spacing: 0.02em;
}

/* Kétszeres pontosvessző javítása és border konzisztencia */
:root {
    --border-color: #46c4b5;
    /* dupla ; eltávolítva */
}

/* Header pozicionálás fix: a position üres volt */
.main-header {
    position: static;
    top: 120px;
}

/* .ql-editor kontraszt a dark UI-hoz */
.ql-editor {
    color: var(--text-color);
    background: color-mix(in oklab, var(--text-color) 6%, transparent);
    border: 1px solid color-mix(in oklab, var(--text-color) 18%, transparent);
    border-radius: 10px;
    padding: 10px 12px;
}

/* Chat buborék olvashatóság javítás */
.ai-message {
    line-height: 1.65;
    color: var(--text-color);
}

.user-message {
    line-height: 1.55;
    background-image: linear-gradient(135deg, color-mix(in oklab, var(--primary-color) 90%, transparent), var(--primary-color));
}

/* Badge-ek sötét témára */
.category-badge {
    background-color: color-mix(in oklab, var(--text-color) 12%, transparent);
    color: color-mix(in oklab, var(--text-color) 85%, var(--text-muted));
}