:root {
    --bg-color: #0c0c0c;
    --sidebar-bg: #111111;
    --card-bg: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #00e5ff; /* NEON CYBER-CYAN */
    --accent-hover: #00b3cc;
    --danger: #ff0055;
    --glass: rgba(20, 20, 20, 0.65);
}

/* ==========================================
   1. GLOBAL & CUSTOM SCROLLBAR
   ========================================== */
body { 
    background-color: var(--bg-color); 
    color: var(--text-primary); 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
    margin: 0; 
    padding: 0; 
    overflow: hidden; 
}

/* Specific styling for the app name to look like code (No Glow) */
.code-title {
    font-family: 'Courier New', Courier, monospace;
    letter-spacing: -1px;
    font-weight: 700;
}

* { scrollbar-width: thin; scrollbar-color: #333 var(--bg-color); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 10px; border: 2px solid var(--bg-color); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ==========================================
   2. LOGIN SCREEN (GLASSMORPHISM)
   ========================================== */
#login-view { 
    height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(rgba(12, 12, 12, 0.75), rgba(12, 12, 12, 0.85)), 
                url('sau-campus-new.jpeg');
    background-size: cover; background-position: center; position: relative; z-index: 10;
}

.login-card { 
    background: var(--glass); backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px);
    padding: 3rem; border-radius: 20px; border: 1px solid rgba(0, 229, 255, 0.15); 
    width: 100%; max-width: 420px; text-align: center; box-shadow: 0 20px 50px rgba(0,0,0,0.8);
    animation: slideUp 0.7s ease-out;
}

.login-card h1 { font-size: 2rem; margin-bottom: 0.5rem; color: var(--accent); }
.login-card p { color: var(--text-secondary); margin-bottom: 2rem; font-size: 0.95rem; }

.role-tabs { display: flex; gap: 10px; margin-bottom: 1.5rem; background: rgba(0,0,0,0.4); padding: 5px; border-radius: 10px; }
.role-tabs button { flex: 1; padding: 0.8rem; border: none; background: transparent; color: var(--text-secondary); border-radius: 6px; cursor: pointer; transition: 0.3s; }
.role-tabs button.active { background: var(--accent); color: black; font-weight: bold; box-shadow: 0 0 15px rgba(0, 229, 255, 0.3); }

.login-card input { 
    width: 100%; padding: 1rem; margin-bottom: 1.2rem; border-radius: 8px; 
    background: rgba(0,0,0,0.6); border: 1px solid rgba(255,255,255,0.1); color: white; box-sizing: border-box; transition: border 0.3s;
}
.login-card input:focus { outline: none; border-color: var(--accent); }
.login-card button:not(.role-tabs button, #toggleAuthMode) { 
    width: 100%; padding: 1.1rem; background: var(--accent); border: none; 
    color: black; font-weight: bold; border-radius: 8px; cursor: pointer; font-size: 1rem;
}

.toggle-auth-msg { margin-top: 1.5rem; font-size: 0.85rem; color: var(--text-secondary); }
#toggleAuthMode { background: none; border: none; color: var(--accent); text-decoration: underline; cursor: pointer; padding: 0; }

/* ==========================================
   3. APP NAVIGATION & LAYOUT
   ========================================== */
nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; background: var(--sidebar-bg); border-bottom: 1px solid #222; }
.nav-brand { display: flex; align-items: center; }
.nav-brand h1 { font-size: 1.5rem; margin: 0; color: var(--accent); }

.app-container { display: flex; height: calc(100vh - 72px); }

.sidebar { width: 280px; background: var(--sidebar-bg); border-right: 1px solid #222; padding: 2rem 1.2rem; overflow-y: auto; }
.channel-group { margin-bottom: 2.5rem; }
.channel-group h4 { font-size: 0.75rem; color: var(--accent); letter-spacing: 2px; margin-bottom: 1rem; opacity: 0.7; text-transform: uppercase; }
.channel-btn { 
    width: 100%; text-align: left; padding: 0.9rem 1.2rem; border-radius: 8px; 
    color: var(--text-secondary); background: none; border: none; cursor: pointer; transition: 0.2s; margin-bottom: 6px; font-size: 1rem; font-family: monospace;
}
.channel-btn:hover:not(.locked) { background: rgba(0, 229, 255, 0.1); color: white; }
.channel-btn.active { background: var(--accent); color: black !important; font-weight: bold; box-shadow: 0 0 10px rgba(0, 229, 255, 0.2); }
.channel-btn.locked { opacity: 0.15; cursor: not-allowed; filter: grayscale(1); }

/* ==========================================
   4. FEED & POST BOX
   ========================================== */
.feed-container { flex: 1; padding: 2rem; overflow-y: auto; display: flex; flex-direction: column; align-items: center; }

.post-box { width: 100%; max-width: 850px; margin-bottom: 2.5rem; background: var(--card-bg); padding: 2rem; border-radius: 14px; border: 1px solid #2a2a2a; }
.post-box h2 { margin: 0 0 1.2rem 0; font-size: 1.4rem; font-family: monospace; color: var(--accent); }
textarea { 
    width: 100%; height: 140px; background: #080808; border: 1px solid #333; 
    border-radius: 8px; color: white; padding: 1.2rem; resize: none; font-size: 1.1rem; box-sizing: border-box; font-family: monospace;
}
textarea:focus { outline: none; border-color: var(--accent); }
.post-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; }
#submitBtn { background: var(--accent); color: black; padding: 10px 20px; border: none; border-radius: 6px; font-weight: bold; cursor: pointer; font-family: monospace; transition: 0.2s; }

.feed-tabs { display: flex; gap: 1.5rem; width: 100%; max-width: 850px; border-bottom: 1px solid #222; margin-bottom: 1.5rem; }
.feed-tabs button { background: none; border: none; color: var(--text-secondary); padding: 12px; cursor: pointer; font-weight: bold; font-size: 1rem; font-family: monospace; transition: 0.2s; }
.feed-tabs button.active { color: var(--accent); border-bottom: 3px solid var(--accent); text-shadow: 0 0 10px rgba(0, 229, 255, 0.5); }

.post-card { 
    background: var(--card-bg); border: 1px solid #2a2a2a; border-radius: 14px; 
    padding: 2.5rem; margin-bottom: 1.5rem; width: 100%; max-width: 850px; box-sizing: border-box; transition: transform 0.2s;
}
.post-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0, 229, 255, 0.05); }

.post-content { font-size: 1.25rem; line-height: 1.6; margin-bottom: 1.2rem; }
.post-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; color: var(--text-secondary); font-size: 0.9rem; font-family: monospace; }
.votes { display: flex; align-items: center; gap: 10px; }
.votes button { background: rgba(255,255,255,0.05); border: none; color: white; padding: 8px 14px; border-radius: 5px; cursor: pointer; transition: 0.2s; }
.votes button:hover { background: rgba(0, 229, 255, 0.2); }

/* ==========================================
   5. MODALS & UTILS
   ========================================== */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.92); display: flex; align-items: center; justify-content: center; z-index: 9999; }
.modal-card { background: var(--card-bg); padding: 3rem; border-radius: 20px; border: 1px solid #333; width: 90%; max-width: 420px; text-align: center; box-shadow: 0 0 30px rgba(0, 229, 255, 0.1); }
.modal-card h2 { color: var(--accent); margin-top: 0; }
.modal-input-group { text-align: left; margin-top: 1.5rem; }
.modal-input-group label { display: block; font-size: 0.8rem; color: var(--accent); margin-bottom: 5px; font-family: monospace; }
select { width: 100%; padding: 1rem; background: #000; color: white; border: 1px solid #444; border-radius: 8px; margin-top: 0.5rem; font-size: 1rem; font-family: monospace; }
select:focus { outline: none; border-color: var(--accent); }
#confirm-join-btn { width: 100%; background: var(--accent); color: black; padding: 1rem; border-radius: 8px; font-weight: bold; border: none; margin-top: 2rem; cursor: pointer; font-family: monospace; transition: 0.2s; }

.hidden { display: none !important; }
.error-text { color: var(--danger); font-size: 0.8rem; margin-top: 10px; display: none; font-weight: bold; }
#modBadge { background: var(--danger); color: white; font-size: 0.7rem; font-weight: bold; padding: 3px 10px; border-radius: 6px; margin-left: 12px; font-family: monospace; }
#logoutBtn { color: var(--danger); background: none; border: 1px solid var(--danger); padding: 5px 15px; border-radius: 5px; cursor: pointer; font-size: 0.8rem; font-family: monospace; transition: 0.2s; }

@keyframes slideUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }

/* ==========================================
   6. RESPONSIVE DESIGN (MOBILE FIX)
   ========================================== */
.mobile-only { display: none; background: none; border: none; color: var(--accent); font-size: 1.8rem; cursor: pointer; margin-right: 15px; }

@media (max-width: 768px) {
    .mobile-only { display: block; }
    .app-container { position: relative; overflow-x: hidden; }
    .sidebar {
        position: absolute; top: 0; left: -100%; height: 100%; width: 280px; z-index: 100;
        background: rgba(10, 10, 10, 0.98); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
        transition: left 0.3s ease; box-shadow: 5px 0 15px rgba(0,0,0,0.8);
    }
    .sidebar.open { left: 0; border-right: 1px solid var(--accent); box-shadow: 5px 0 20px rgba(0, 229, 255, 0.2); }
    .feed-container { padding: 1rem; width: 100%; box-sizing: border-box; }
    .post-box, .post-card, .feed-tabs { padding: 1.5rem; }
    textarea { height: 100px; }
}