/* =========================================================
   CTF//PLATFORM — cyber security themed UI
   ========================================================= */

:root {
    --bg: #070a10;
    --bg-alt: #0b0f17;
    --panel: #0e1420;
    --panel-2: #121a29;
    --border: #1c2536;
    --border-soft: #161e2c;
    --text: #cdd9e5;
    --text-dim: #7c8aa0;
    --text-faint: #4d5a70;
    --neon: #00ff9d;
    --neon-dim: #00b876;
    --cyan: #00d9ff;
    --amber: #ffb020;
    --red: #ff3b5c;
    --purple: #a855f7;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --glow-green: 0 0 12px rgba(0,255,157,.35);
    --glow-cyan: 0 0 12px rgba(0,217,255,.3);
    --radius: 8px;
}

* { scrollbar-color: var(--neon-dim) var(--bg-alt); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--neon-dim); }

::selection { background: rgba(0,255,157,.28); color: #fff; }

html, body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    min-height: 100%;
}

body {
    background-image:
        linear-gradient(rgba(0,255,157,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,255,157,.035) 1px, transparent 1px),
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0,217,255,.08), transparent);
    background-size: 42px 42px, 42px 42px, 100% 100%;
    background-attachment: fixed;
    position: relative;
}

#matrixCanvas {
    position: fixed; inset: 0; width: 100%; height: 100%;
    z-index: -2; opacity: .16; pointer-events: none;
}
.scanline-overlay {
    position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background: repeating-linear-gradient(180deg, rgba(0,0,0,0) 0, rgba(0,0,0,0) 2px, rgba(0,0,0,.18) 3px);
    mix-blend-mode: overlay;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-mono); font-weight: 700; letter-spacing: .2px; color: #fff; }
code, pre, .flag-input, .mono { font-family: var(--font-mono) !important; }

a { color: var(--cyan); }
a:hover { color: var(--neon); }

.text-secondary { color: var(--text-dim) !important; }

/* ---------------- Navbar ---------------- */
.navbar {
    background: linear-gradient(180deg, rgba(14,20,32,.95), rgba(10,14,22,.9));
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 0 rgba(0,255,157,.08), 0 8px 24px rgba(0,0,0,.35);
}
.navbar-brand {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.05rem;
    display: flex;
    align-items: baseline;
    gap: 2px;
}
.brand-prompt { color: var(--neon); text-shadow: var(--glow-green); }
.brand-colon { color: var(--text-faint); }
.brand-path { color: var(--cyan); }
.brand-cursor { color: var(--neon); animation: blink 1.1s step-end infinite; margin-left: 2px; }
@keyframes blink { 50% { opacity: 0; } }

.navbar-nav .nav-link {
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: .85rem;
    padding: .5rem .9rem !important;
    border-radius: 6px;
    transition: color .15s, background .15s;
}
.navbar-nav .nav-link:hover { color: var(--neon); background: rgba(0,255,157,.06); }
.navbar-nav .nav-link.active { color: var(--neon); background: rgba(0,255,157,.09); text-shadow: var(--glow-green); }

.nav-avatar { border-radius: 50%; border: 2px solid var(--border); }
.role-chip {
    font-family: var(--font-mono); font-size: .62rem; font-weight: 700; letter-spacing: .5px;
    padding: 2px 7px; border-radius: 999px; margin-left: 4px;
}
.role-chip-teacher { background: rgba(168,85,247,.15); color: #c89bfb; border: 1px solid rgba(168,85,247,.4); }
.role-chip-student { background: rgba(0,217,255,.12); color: var(--cyan); border: 1px solid rgba(0,217,255,.4); }

.dropdown-menu-dark {
    background: var(--panel-2); border: 1px solid var(--border);
    box-shadow: 0 12px 32px rgba(0,0,0,.5);
}
.dropdown-menu-dark .dropdown-item { color: var(--text); font-size: .9rem; }
.dropdown-menu-dark .dropdown-item:hover { background: rgba(0,255,157,.08); color: var(--neon); }
.dropdown-divider { border-color: var(--border); }

/* ---------------- Cards / panels ---------------- */
.card {
    background: linear-gradient(180deg, var(--panel), var(--bg-alt));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 18px rgba(0,0,0,.28);
    color: var(--text);
}
.card-title { color: #fff; }
.card-header, .card-footer { background: rgba(255,255,255,.02); border-color: var(--border) !important; font-family: var(--font-mono); font-size: .85rem; color: var(--text); }

.level-card { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; border: 1px solid var(--border); }
.level-card:not(.locked):hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(0,0,0,.4), var(--glow-green); border-color: var(--neon-dim); }
.level-card.locked { opacity: .5; filter: grayscale(75%); }

/* ---------------- Badges ---------------- */
.badge-easy { background: rgba(0,255,157,.14); color: var(--neon); border: 1px solid rgba(0,255,157,.4); font-family: var(--font-mono); font-weight: 600; }
.badge-medium { background: rgba(255,176,32,.14); color: var(--amber); border: 1px solid rgba(255,176,32,.4); font-family: var(--font-mono); font-weight: 600; }
.badge-hard { background: rgba(255,59,92,.14); color: var(--red); border: 1px solid rgba(255,59,92,.4); font-family: var(--font-mono); font-weight: 600; }

.badge { font-weight: 600; letter-spacing: .2px; }
.badge.bg-success { background: rgba(0,255,157,.16) !important; color: var(--neon) !important; border: 1px solid rgba(0,255,157,.4); }
.badge.bg-secondary { background: rgba(124,138,160,.16) !important; color: var(--text-dim) !important; border: 1px solid var(--border); }
.badge.bg-warning { background: rgba(255,176,32,.16) !important; color: var(--amber) !important; border: 1px solid rgba(255,176,32,.4); }
.badge.bg-danger { background: rgba(255,59,92,.16) !important; color: var(--red) !important; border: 1px solid rgba(255,59,92,.4); }

/* ---------------- Buttons ---------------- */
.btn { font-family: var(--font-mono); font-weight: 600; font-size: .88rem; border-radius: 6px; letter-spacing: .2px; }
.btn-primary {
    background: var(--neon); border-color: var(--neon); color: #06120c;
}
.btn-primary:hover, .btn-primary:focus {
    background: #33ffb3; border-color: #33ffb3; color: #06120c; box-shadow: var(--glow-green);
}
.btn-secondary { background: var(--panel-2); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: #1a2334; border-color: var(--text-faint); color: #fff; }

.btn-outline-light { color: var(--text); border-color: var(--border); }
.btn-outline-light:hover { background: rgba(0,255,157,.08); border-color: var(--neon-dim); color: var(--neon); }
.btn-outline-info { color: var(--cyan); border-color: rgba(0,217,255,.4); }
.btn-outline-info:hover { background: rgba(0,217,255,.12); border-color: var(--cyan); color: #fff; }
.btn-outline-success { color: var(--neon); border-color: rgba(0,255,157,.4); }
.btn-outline-success:hover { background: rgba(0,255,157,.12); border-color: var(--neon); color: #fff; }
.btn-outline-warning { color: var(--amber); border-color: rgba(255,176,32,.4); }
.btn-outline-warning:hover { background: rgba(255,176,32,.12); border-color: var(--amber); color: #fff; }
.btn-outline-danger { color: var(--red); border-color: rgba(255,59,92,.4); }
.btn-outline-danger:hover { background: rgba(255,59,92,.12); border-color: var(--red); color: #fff; }
.btn-success { background: var(--neon-dim); border-color: var(--neon-dim); color: #06120c; }
.btn-success:hover { background: var(--neon); border-color: var(--neon); }

/* ---------------- Forms ---------------- */
.form-control, .form-select {
    background: var(--bg-alt); border: 1px solid var(--border); color: var(--text);
    font-family: var(--font-mono); font-size: .9rem; border-radius: 6px;
}
.form-control:focus, .form-select:focus {
    background: var(--bg-alt); border-color: var(--neon-dim); color: #fff;
    box-shadow: 0 0 0 .2rem rgba(0,255,157,.15);
}
.form-control::placeholder { color: var(--text-faint); }
.form-label { font-family: var(--font-mono); font-size: .82rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .4px; }
.form-text { color: var(--text-faint); font-size: .78rem; }
.form-check-input { background-color: var(--bg-alt); border-color: var(--border); }
.form-check-input:checked { background-color: var(--neon-dim); border-color: var(--neon-dim); }

/* ---------------- Tables ---------------- */
.table { color: var(--text); }
.table-dark { --bs-table-bg: transparent; }
.table-dark td, .table-dark th { border-color: var(--border-soft); vertical-align: middle; }
.table-dark thead th { font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .6px; color: var(--text-dim); border-bottom: 1px solid var(--border); }
.table-hover > tbody > tr:hover > * { background: rgba(0,255,157,.045); color: #fff; }

/* ---------------- Modals ---------------- */
.modal-content { background: var(--panel-2) !important; border: 1px solid var(--border) !important; box-shadow: 0 20px 60px rgba(0,0,0,.6); }
.border-secondary { border-color: var(--border) !important; }
.btn-close-white { filter: invert(1) grayscale(100%) brightness(200%); }

/* ---------------- Alerts ---------------- */
.alert { border-radius: 6px; font-size: .9rem; }
.alert-success { background: rgba(0,255,157,.1); border: 1px solid rgba(0,255,157,.35); color: var(--neon); }
.alert-danger { background: rgba(255,59,92,.1); border: 1px solid rgba(255,59,92,.35); color: #ff8098; }
.alert-warning { background: rgba(255,176,32,.1); border: 1px solid rgba(255,176,32,.35); color: var(--amber); }
.alert-secondary { background: rgba(124,138,160,.1); border: 1px solid var(--border); color: var(--text-dim); }

/* ---------------- Progress ---------------- */
.progress { background: var(--bg-alt); border: 1px solid var(--border); }
.progress-bar.bg-success { background: var(--neon) !important; box-shadow: var(--glow-green); }

/* ---------------- Yarisma gorseli (ogrenci tarafi kartlar/banner) ---------------- */
.comp-card-img { height: 140px; object-fit: cover; border-bottom: 1px solid var(--border); }
.comp-card-img-placeholder {
    display: flex; align-items: center; justify-content: center; background: var(--bg-alt);
    color: var(--text-faint); font-size: 2.2rem;
}
.comp-banner-img { width: 100%; max-height: 260px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--border); }

/* ---------------- Yarisma gorseli thumbnail (ogretmen yonetimi) ---------------- */
.comp-thumb-wrap { position: relative; width: 84px; height: 84px; flex-shrink: 0; }
.comp-thumb { width: 84px; height: 84px; border-radius: 10px; object-fit: cover; border: 1px solid var(--border); display: block; }
.comp-thumb-placeholder { display: flex; align-items: center; justify-content: center; background: var(--bg-alt); color: var(--text-faint); font-size: 1.6rem; }
.comp-thumb-edit {
    position: absolute; bottom: -6px; right: -6px; width: 26px; height: 26px; border-radius: 50%;
    background: var(--neon); color: #06120c; display: flex; align-items: center; justify-content: center;
    font-size: .7rem; cursor: pointer; border: 2px solid var(--panel); box-shadow: 0 2px 8px rgba(0,0,0,.4);
}
.comp-thumb-edit:hover { background: #33ffb3; }
.comp-thumb-remove {
    position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; border-radius: 50%;
    background: var(--red); color: #fff; border: 2px solid var(--panel); display: flex; align-items: center; justify-content: center;
    font-size: .7rem; cursor: pointer; padding: 0;
}

/* ---------------- Avatars ---------------- */
.avatar-lg { width: 110px; height: 110px; object-fit: cover; border-radius: 50%; border: 3px solid var(--border); box-shadow: 0 0 0 4px rgba(0,255,157,.08); }
.avatar-sm { width: 32px; height: 32px; object-fit: cover; border-radius: 50%; border: 1px solid var(--border); }

/* ---------------- Flag input / code blocks ---------------- */
.flag-input { color: var(--neon) !important; background: #05080c !important; }
pre.code-block {
    background: #05080c; border: 1px solid var(--border); border-radius: 6px;
    padding: .75rem 1rem; color: var(--neon); font-size: .85rem;
}
pre { background: #05080c; border: 1px solid var(--border); border-radius: 6px; padding: .6rem .9rem; color: var(--neon); }

/* ---------------- Nav tabs ---------------- */
.nav-tabs { border-color: var(--border); }
.nav-tabs .nav-link { color: var(--text-dim); font-family: var(--font-mono); font-size: .85rem; border: 1px solid transparent; }
.nav-tabs .nav-link:hover { border-color: var(--border); color: var(--neon); }
.nav-tabs .nav-link.active { background: var(--panel); color: var(--neon); border-color: var(--border) var(--border) var(--panel); }

/* ---------------- List group ---------------- */
.list-group-item { background: var(--panel); border-color: var(--border-soft); color: var(--text); }

/* ---------------- Toasts (custom, replaces bootstrap alerts in JS) ---------------- */
#appToastBox { position: fixed; top: 1rem; right: 1rem; z-index: 2000; display: flex; flex-direction: column; gap: .5rem; }
.app-toast {
    min-width: 260px; padding: .7rem 1rem; border-radius: 6px; font-family: var(--font-mono); font-size: .85rem;
    background: var(--panel-2); border: 1px solid var(--border); box-shadow: 0 10px 30px rgba(0,0,0,.4);
    animation: toastIn .25s ease;
}
.app-toast-success { border-color: rgba(0,255,157,.5); color: var(--neon); }
.app-toast-danger { border-color: rgba(255,59,92,.5); color: #ff8098; }
.app-toast-out { opacity: 0; transform: translateX(20px); transition: all .3s ease; }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* ---------------- Terminal window (login etc.) ---------------- */
.terminal-window {
    background: linear-gradient(180deg, var(--panel), var(--bg-alt));
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 0 0 1px rgba(0,255,157,.06), 0 25px 60px rgba(0,0,0,.55), var(--glow-green);
    overflow: hidden;
}
.terminal-titlebar {
    display: flex; align-items: center; gap: 8px;
    padding: .6rem .9rem; background: rgba(255,255,255,.03); border-bottom: 1px solid var(--border);
}
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot-red { background: #ff5f56; }
.terminal-dot-yellow { background: #ffbd2e; }
.terminal-dot-green { background: #27c93f; }
.terminal-titlebar-label { margin-left: auto; font-family: var(--font-mono); font-size: .72rem; color: var(--text-faint); }

.glow-text { color: var(--neon); text-shadow: var(--glow-green); }
.section-title {
    font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 1px; font-size: .85rem;
    color: var(--text-dim); display: flex; align-items: center; gap: .5rem; margin-bottom: 1rem;
}
.section-title::before { content: '//'; color: var(--neon-dim); }

/* ---------------- Stat tiles ---------------- */
.stat-tile { background: linear-gradient(180deg, var(--panel), var(--bg-alt)); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem; text-align: center; }
.stat-tile .stat-icon { font-size: 1.6rem; color: var(--neon); text-shadow: var(--glow-green); }
.stat-tile .stat-value { font-family: var(--font-mono); font-size: 1.6rem; font-weight: 800; color: #fff; }
.stat-tile .stat-label { font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .5px; color: var(--text-dim); }

@media (max-width: 767px) {
    body { background-size: 28px 28px, 28px 28px, 100% 100%; }
}

/* ============================================================
   Chat widget (her sayfadan erisilebilen mesajlasma paneli)
   ============================================================ */
.chat-widget { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 1500; font-family: var(--font-body); }

.chat-toggle-btn {
    width: 58px; height: 58px; border-radius: 50%; border: 1px solid var(--neon-dim);
    background: var(--neon); color: #06120c; font-size: 1.4rem;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 24px rgba(0,0,0,.45), var(--glow-green);
    cursor: pointer; position: relative; transition: transform .15s ease;
}
.chat-toggle-btn:hover { transform: scale(1.06); }
.chat-badge {
    position: absolute; top: -4px; right: -4px; min-width: 20px; height: 20px; padding: 0 5px;
    background: var(--red); color: #fff; border-radius: 999px; font-size: .7rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center; font-family: var(--font-mono);
    box-shadow: 0 0 0 2px var(--bg);
}

.chat-panel {
    position: absolute; right: 0; bottom: 72px; width: 370px; height: 560px; max-height: 75vh;
    background: linear-gradient(180deg, var(--panel), var(--bg-alt));
    border: 1px solid var(--border); border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,.6), 0 0 0 1px rgba(0,255,157,.05);
    display: flex; flex-direction: column; overflow: hidden;
}

.chat-panel-header {
    display: flex; align-items: center; gap: .4rem; padding: .7rem .9rem;
    border-bottom: 1px solid var(--border); background: rgba(255,255,255,.02);
    font-family: var(--font-mono); font-weight: 600; font-size: .9rem;
}
.chat-icon-btn {
    background: transparent; border: none; color: var(--text-dim); width: 28px; height: 28px;
    border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer;
}
.chat-icon-btn:hover { background: rgba(0,255,157,.1); color: var(--neon); }

.chat-body { flex: 1; overflow-y: auto; }
.chat-conv-item, .chat-contact-item {
    display: flex; align-items: center; gap: .6rem; padding: .65rem .9rem; cursor: pointer;
    border-bottom: 1px solid var(--border-soft); transition: background .12s;
}
.chat-conv-item:hover, .chat-contact-item:hover { background: rgba(0,255,157,.05); }
.chat-conv-avatar, .chat-contact-item img { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); flex-shrink: 0; }
.chat-conv-group-icon {
    width: 38px; height: 38px; border-radius: 50%; background: rgba(168,85,247,.15); border: 1px solid rgba(168,85,247,.4);
    display: flex; align-items: center; justify-content: center; color: #c89bfb; flex-shrink: 0; font-size: 1rem;
}
.chat-conv-meta { flex: 1; min-width: 0; }
.chat-conv-name { font-size: .85rem; color: #fff; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-conv-preview { font-size: .76rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-conv-unread {
    background: var(--red); color: #fff; font-size: .68rem; font-weight: 700; min-width: 18px; height: 18px;
    border-radius: 999px; display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); flex-shrink: 0;
}
.chat-empty-hint { padding: 2rem 1rem; text-align: center; color: var(--text-faint); font-size: .82rem; }

.chat-messages { display: flex; flex-direction: column; gap: .5rem; padding: .8rem; }
.chat-bubble-row { display: flex; gap: .5rem; max-width: 85%; }
.chat-bubble-row.mine { align-self: flex-end; flex-direction: row-reverse; }
.chat-bubble-avatar { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; flex-shrink: 0; margin-top: 2px; }
.chat-bubble {
    background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px; padding: .45rem .7rem;
    font-size: .84rem; word-break: break-word;
}
.chat-bubble-row.mine .chat-bubble { background: rgba(0,255,157,.12); border-color: rgba(0,255,157,.35); }
.chat-bubble-sender { font-size: .68rem; color: var(--cyan); font-family: var(--font-mono); margin-bottom: 2px; }
.chat-bubble-time { font-size: .65rem; color: var(--text-faint); margin-top: 2px; }
.chat-bubble-img { max-width: 100%; border-radius: 8px; margin-top: 4px; cursor: pointer; display: block; }

.chat-input-bar { display: flex; align-items: center; gap: .4rem; padding: .6rem .7rem; border-top: 1px solid var(--border); background: rgba(255,255,255,.02); }
.chat-text-input {
    flex: 1; background: var(--bg-alt); border: 1px solid var(--border); color: var(--text);
    border-radius: 999px; padding: .45rem .9rem; font-size: .85rem; font-family: var(--font-body);
}
.chat-text-input:focus { outline: none; border-color: var(--neon-dim); }
.chat-image-preview { padding: .5rem .7rem 0; }
.chat-image-preview img { max-height: 70px; border-radius: 8px; border: 1px solid var(--border); }

.chat-member-list { max-height: 260px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; padding: .5rem; }
.chat-member-row { display: flex; align-items: center; gap: .5rem; padding: .3rem .2rem; font-size: .85rem; }
.chat-member-row img { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; }

@media (max-width: 480px) {
    .chat-panel { width: calc(100vw - 1.5rem); right: -0.5rem; }
}