/* CTF Platform - shared dark theme */
* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Arial, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
}

nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.8rem 2rem;
    background: #1e293b;
    border-bottom: 1px solid #334155;
}
nav .brand { color: #38bdf8; font-weight: bold; text-decoration: none; }
nav a { color: #94a3b8; text-decoration: none; }
nav a:hover { color: #38bdf8; }
nav .spacer { flex: 1; }
nav .user-info { color: #94a3b8; font-size: 0.9rem; }
nav .user-info b { color: #e2e8f0; }

.container { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; }

.card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 2rem 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}
.center-card {
    width: 380px;
    margin: 12vh auto 0;
    text-align: center;
}
h1 { color: #38bdf8; margin-top: 0; }
h2 { color: #e2e8f0; }

input, textarea, select {
    display: block;
    width: 100%;
    margin: 0.5rem 0 1rem;
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    border: 1px solid #334155;
    background: #0f172a;
    color: #e2e8f0;
    font-family: inherit;
}
input[type="file"] { padding: 0.4rem; }
button, .btn {
    display: inline-block;
    padding: 0.6rem 1.6rem;
    border: none;
    border-radius: 6px;
    background: #38bdf8;
    color: #0f172a;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
}
button:hover, .btn:hover { background: #7dd3fc; }
button.danger { background: #f87171; }
button.danger:hover { background: #fca5a5; }
button.small { padding: 0.35rem 0.9rem; font-size: 0.85rem; }

.message { margin: 1rem 0; padding: 0.7rem 1rem; border-radius: 6px; display: none; }
.message.ok { display: block; background: #14532d; color: #bbf7d0; }
.message.error { display: block; background: #7f1d1d; color: #fecaca; }
.message.info { display: block; background: #1e3a5f; color: #bfdbfe; }

/* challenge grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.chal {
    background: #1e293b; border: 1px solid #334155; border-radius: 10px;
    padding: 1.2rem 1.4rem; cursor: pointer; transition: border-color 0.15s;
}
.chal:hover { border-color: #38bdf8; }
.chal h3 { margin: 0 0 0.4rem; }
.badge {
    display: inline-block; font-size: 0.75rem; font-weight: bold;
    padding: 0.15rem 0.6rem; border-radius: 999px; margin-right: 0.4rem;
}
.badge.web { background: #164e63; color: #67e8f9; }
.badge.forensics { background: #365314; color: #d9f99d; }
.badge.crypto { background: #4c1d95; color: #ddd6fe; }
.badge.Easy { background: #14532d; color: #bbf7d0; }
.badge.Medium { background: #713f12; color: #fde68a; }
.badge.Hard { background: #7f1d1d; color: #fecaca; }
.badge.solved { background: #38bdf8; color: #0f172a; }
.points { color: #94a3b8; font-size: 0.85rem; }

.detail-actions { display: flex; gap: 0.8rem; align-items: center; margin: 1rem 0; flex-wrap: wrap; }
.instance-url {
    display: inline-block; padding: 0.5rem 1rem; border-radius: 6px;
    background: #0f172a; border: 1px dashed #38bdf8; color: #7dd3fc;
    font-family: Consolas, monospace; font-size: 0.9rem; word-break: break-all;
}
code.flag-input { display: block; }

/* profile */
.avatar-wrap { text-align: center; margin-bottom: 1.5rem; }
.avatar {
    width: 128px; height: 128px; border-radius: 50%;
    object-fit: cover; border: 2px solid #38bdf8; background: #0f172a;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 3rem; color: #475569; overflow: hidden;
}
/* show the full picture without automatic zoom/crop */
.avatar img {
    width: 100%; height: 100%;
    object-fit: contain;
    background: #0f172a;
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

/* admin table */
table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid #334155; font-size: 0.92rem; }
th { color: #94a3b8; font-weight: normal; }
.mono { font-family: Consolas, monospace; color: #7dd3fc; word-break: break-all; }

/* ---------- scoreboard ---------- */
table.board { width: 100%; border-collapse: collapse; background: #1e293b; border-radius: 12px; overflow: hidden; }
table.board th, table.board td { padding: 0.7rem 1rem; text-align: left; border-bottom: 1px solid #334155; }
table.board th { background: #0f172a; color: #94a3b8; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
table.board tr:last-child td { border-bottom: none; }
table.board tr.top td { background: rgba(250, 204, 21, 0.06); }
a.player { color: #38bdf8; text-decoration: none; font-weight: 600; }
a.player:hover { text-decoration: underline; }
.admin-tag { background: #7f1d1d; color: #fecaca; font-size: 0.7rem; padding: 0.1rem 0.4rem; border-radius: 4px; margin-left: 0.3rem; }
.hint { color: #64748b; font-size: 0.85rem; margin-top: 1rem; }

/* ---------- solved lock ---------- */
.chal.locked { opacity: 0.75; border: 1px solid #166534; }
.solved-lock { background: #0f172a; border: 1px solid #166534; color: #86efac; padding: 1rem 1.2rem; border-radius: 10px; margin-top: 0.8rem; }

/* ---------- first blood animation ---------- */
.fb-overlay { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle, rgba(127,0,0,0.85), rgba(30,0,0,0.95)); pointer-events: none;
  animation: fb-splash 0.4s ease-out; }
.fb-content { text-align: center; animation: fb-pop 0.5s cubic-bezier(0.2, 1.6, 0.4, 1); }
.fb-blood { font-size: 5rem; animation: fb-beat 0.9s infinite; }
.fb-title { font-size: 3rem; font-weight: 900; color: #ef4444; letter-spacing: 0.12em;
  text-shadow: 0 0 30px #ef4444, 0 0 60px #991b1b; animation: fb-pulse 1.2s infinite; }
.fb-sub { color: #fca5a5; margin-top: 0.6rem; font-size: 1.05rem; }
.fb-overlay.fb-fade { animation: fb-out 0.8s forwards; }
@keyframes fb-splash { from { opacity: 0; transform: scale(1.3); } to { opacity: 1; transform: scale(1); } }
@keyframes fb-pop { from { transform: scale(0.3); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes fb-beat { 0%, 100% { transform: scale(1); } 25% { transform: scale(1.25); } 40% { transform: scale(0.95); } 60% { transform: scale(1.15); } }
@keyframes fb-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.75; } }
@keyframes fb-out { to { opacity: 0; } }