/* === TERMINAL / HACKER THEME === */
:root {
    --bg:          #000000;
    --surface:     #050505;
    --sidebar-bg:  #020202;
    --accent:      #00ff41;
    --accent-dim:  #00aa2a;
    --text:        #00cc33;
    --text-bright: #00ff41;
    --text-muted:  #005514;
    --danger:      #ff2222;
    --warning:     #ffaa00;
    --border:      #003311;
    --input-bg:    #010801;
    --msg-self:    #001a08;
    --msg-other:   #000d04;
    --font: 'Courier New', Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace;
    --glow:        0 0 6px rgba(0,255,65,0.5);
    --glow-sm:     0 0 3px rgba(0,255,65,0.3);
}

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

/* Scanline overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 3px,
        rgba(0,0,0,0.18) 3px,
        rgba(0,0,0,0.18) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
    text-shadow: var(--glow-sm);
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: var(--accent-dim); }

/* Blinking cursor animation */
@keyframes blink { 50% { opacity: 0; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scanIn { from { clip-path: inset(0 0 100% 0); } to { clip-path: inset(0 0 0% 0); } }

/* === Buttons === */
.btn {
    padding: 6px 14px;
    border: 1px solid var(--accent-dim);
    background: transparent;
    color: var(--accent);
    font-family: var(--font);
    font-size: 13px;
    cursor: pointer;
    text-shadow: var(--glow-sm);
    transition: all 0.15s;
    letter-spacing: 0.5px;
}
.btn::before { content: '['; margin-right: 2px; color: var(--accent-dim); }
.btn::after  { content: ']'; margin-left:  2px; color: var(--accent-dim); }
.btn:hover {
    background: rgba(0,255,65,0.08);
    border-color: var(--accent);
    color: var(--text-bright);
    box-shadow: var(--glow);
    text-shadow: var(--glow);
}
.btn-primary, .btn-accent {
    border-color: var(--accent);
    color: #000;
    background: var(--accent);
    text-shadow: none;
    font-weight: 700;
}
.btn-primary::before, .btn-primary::after,
.btn-accent::before,  .btn-accent::after { display: none; }
.btn-primary:hover, .btn-accent:hover {
    background: var(--text-bright);
    box-shadow: 0 0 14px rgba(0,255,65,0.8);
    text-shadow: none;
    color: #000;
}
.btn-outline { background: transparent; }
.btn-danger  { border-color: var(--danger); color: var(--danger); }
.btn-danger::before, .btn-danger::after { color: var(--danger); }
.btn-danger:hover { background: rgba(255,34,34,0.1); box-shadow: 0 0 8px rgba(255,34,34,0.4); }
.btn-full { width: 100%; display: block; text-align: center; }
.btn-sm   { padding: 3px 8px; font-size: 12px; }
.btn-xs   { padding: 1px 5px; font-size: 11px; border: none; background: transparent; }
.btn-xs::before, .btn-xs::after { display: none; }
.btn-send   { font-size: 16px; padding: 6px 12px; min-width: 40px; }
.btn-attach { font-size: 16px; padding: 4px 8px; border: none; background: transparent; }
.btn-attach::before, .btn-attach::after { display: none; }

/* === Auth Page === */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: auto;
    background: var(--bg);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 32px 28px;
    border: 1px solid var(--accent-dim);
    background: var(--surface);
    margin: 20px;
    box-shadow: 0 0 30px rgba(0,255,65,0.08), inset 0 0 30px rgba(0,0,0,0.5);
    animation: scanIn 0.4s ease;
}

.auth-logo { text-align: center; margin-bottom: 28px; }
.lock-icon { font-size: 36px; display: block; margin-bottom: 8px; }
.auth-logo h1 {
    font-size: 22px;
    color: var(--accent);
    text-shadow: var(--glow);
    letter-spacing: 4px;
    text-transform: uppercase;
}
.auth-logo h1::before { content: '> '; color: var(--accent-dim); }
.auth-subtitle {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 6px;
    letter-spacing: 1px;
}
.auth-subtitle::before { content: '# '; }

.auth-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    gap: 0;
}
.auth-tab {
    flex: 1;
    padding: 8px 4px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font);
    font-size: 13px;
    cursor: pointer;
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.auth-tab.active { color: var(--accent); border-bottom-color: var(--accent); text-shadow: var(--glow-sm); }

.auth-form { display: none; }
.auth-form.active { display: block; animation: fadeIn 0.2s ease; }

/* Form elements */
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block;
    margin-bottom: 4px;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.form-group label::before { content: '> '; color: var(--accent-dim); }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 8px 10px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--accent);
    font-family: var(--font);
    font-size: 14px;
    text-shadow: var(--glow-sm);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
    caret-color: var(--accent);
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 8px rgba(0,255,65,0.2);
}
.form-group input[type="checkbox"] { accent-color: var(--accent); margin-right: 6px; }

.form-error {
    color: var(--danger);
    font-size: 12px;
    margin-top: 10px;
    text-align: center;
    min-height: 18px;
    text-shadow: 0 0 6px rgba(255,34,34,0.5);
}
.form-error::before { content: '[ERR] '; }
.guest-notice {
    color: var(--warning);
    font-size: 11px;
    margin-bottom: 14px;
    line-height: 1.5;
    text-shadow: 0 0 5px rgba(255,170,0,0.4);
}
.guest-notice::before { content: '[!] '; }

/* === App Layout === */
.app-page { overflow: hidden; }
.app-container { display: flex; height: 100vh; width: 100%; }

/* Sidebar */
.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    background: #000;
}
.user-info { display: flex; align-items: center; gap: 8px; }
.user-avatar {
    width: 28px;
    height: 28px;
    border: 1px solid var(--accent-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--accent);
    font-size: 13px;
    text-shadow: var(--glow);
}
.user-name {
    font-size: 13px;
    color: var(--text-bright);
    text-shadow: var(--glow-sm);
    letter-spacing: 0.5px;
}
.user-name::before { content: '@'; color: var(--accent-dim); }

.guest-badge {
    font-size: 9px;
    background: var(--warning);
    color: #000;
    padding: 1px 5px;
    font-weight: 700;
    letter-spacing: 1px;
}
.guest-warning {
    background: rgba(255,170,0,0.05);
    color: var(--warning);
    font-size: 11px;
    padding: 6px 14px;
    text-align: center;
    border-bottom: 1px solid rgba(255,170,0,0.2);
    text-shadow: 0 0 5px rgba(255,170,0,0.4);
}
.guest-warning::before { content: '[!] '; }

.sidebar-actions {
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-bottom: 1px solid var(--border);
}

.room-list { flex: 1; overflow-y: auto; padding: 4px; }
.room-list-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 30px 16px;
    font-size: 12px;
    letter-spacing: 1px;
}
.room-list-empty::before { content: '# NO CHANNELS\A'; white-space: pre; display: block; margin-bottom: 4px; }

.room-item {
    padding: 9px 12px;
    cursor: pointer;
    border: 1px solid transparent;
    margin-bottom: 2px;
    transition: all 0.1s;
}
.room-item:hover { border-color: var(--border); background: rgba(0,255,65,0.03); }
.room-item.active {
    border-color: var(--accent-dim);
    background: rgba(0,255,65,0.06);
    border-left: 2px solid var(--accent);
}
.room-item-name {
    font-size: 13px;
    color: var(--text-bright);
    text-shadow: var(--glow-sm);
}
.room-item-name::before { content: '# '; color: var(--accent-dim); }
.room-item-meta { font-size: 11px; color: var(--text-muted); margin-top: 2px; letter-spacing: 0.5px; }

.sidebar-toggle {
    display: none;
    position: fixed;
    top: 10px; left: 10px;
    z-index: 100;
    background: #000;
    border: 1px solid var(--accent-dim);
    color: var(--accent);
    font-size: 18px;
    padding: 4px 8px;
    cursor: pointer;
    font-family: var(--font);
}

/* Chat Main */
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.chat-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 13px;
    letter-spacing: 1px;
}
.placeholder-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.3; }
.chat-placeholder h2 {
    font-size: 18px;
    color: var(--accent-dim);
    text-shadow: var(--glow-sm);
    margin-bottom: 8px;
    letter-spacing: 3px;
}
.chat-placeholder h2::before { content: '>> '; }
.chat-placeholder p::before { content: '# '; }

.chat-active { display: flex; flex-direction: column; height: 100vh; }

.chat-header {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    background: #000;
    gap: 10px;
}
.chat-header-info { flex: 1; min-width: 0; }
.chat-header-info h3 {
    font-size: 14px;
    color: var(--text-bright);
    text-shadow: var(--glow-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: 1px;
}
.chat-header-info h3::before { content: '# '; color: var(--accent-dim); }
.member-count { font-size: 11px; color: var(--text-muted); letter-spacing: 0.5px; }
.chat-header-actions { display: flex; gap: 6px; }
.back-btn { display: none; }

/* Messages */
.messages-container { flex: 1; overflow-y: auto; position: relative; padding: 12px 16px; }
.messages-list { display: flex; flex-direction: column; gap: 2px; }

.message {
    max-width: 78%;
    padding: 6px 12px;
    border: 1px solid var(--border);
    animation: fadeIn 0.15s ease;
    font-size: 13px;
    line-height: 1.5;
    position: relative;
}
.message.self {
    align-self: flex-end;
    background: var(--msg-self);
    border-color: var(--accent-dim);
    border-left: 2px solid var(--accent);
}
.message.other {
    align-self: flex-start;
    background: var(--msg-other);
    border-left: 2px solid var(--text-muted);
}
.message-sender {
    font-size: 11px;
    color: var(--accent-dim);
    font-weight: 700;
    margin-bottom: 2px;
    letter-spacing: 0.5px;
    text-shadow: var(--glow-sm);
}
.message-sender::before { content: '<'; }
.message-sender::after  { content: '>'; }
.message-text { color: var(--text); word-wrap: break-word; white-space: pre-wrap; }
.message.self .message-text { color: var(--text-bright); }
.message-time { font-size: 10px; color: var(--text-muted); margin-top: 3px; text-align: right; letter-spacing: 0.5px; }

.message-file {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: rgba(0,255,65,0.04);
    border: 1px solid var(--border);
    margin-top: 4px;
    cursor: pointer;
    transition: background 0.15s;
    text-decoration: none;
    color: inherit;
}
.message-file:hover { background: rgba(0,255,65,0.08); border-color: var(--accent-dim); }
.message-file-icon { font-size: 18px; }
.message-file-info { flex: 1; min-width: 0; }
.message-file-name { font-size: 12px; color: var(--accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.message-file-size { font-size: 10px; color: var(--text-muted); }

.system-message {
    text-align: center;
    color: var(--text-muted);
    font-size: 11px;
    padding: 6px;
    max-width: 100%;
    letter-spacing: 1px;
}
.system-message::before { content: '--- '; }
.system-message::after  { content: ' ---'; }

.new-msg-indicator {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #000;
    border: none;
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 700;
    font-family: var(--font);
    cursor: pointer;
    letter-spacing: 1px;
    box-shadow: 0 0 12px rgba(0,255,65,0.6);
}

/* Chat Input */
.chat-input-area { border-top: 1px solid var(--border); background: #000; }
.chat-input-row {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    padding: 10px 14px;
}
#messageInput {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--accent);
    font-family: var(--font);
    font-size: 13px;
    padding: 8px 10px;
    resize: none;
    max-height: 100px;
    line-height: 1.4;
    text-shadow: var(--glow-sm);
    outline: none;
    caret-color: var(--accent);
}
#messageInput:focus { border-color: var(--accent); box-shadow: 0 0 8px rgba(0,255,65,0.15); }
#messageInput::placeholder { color: var(--text-muted); }

/* Input prompt label */
.input-prompt {
    color: var(--accent-dim);
    font-size: 13px;
    padding-bottom: 8px;
    white-space: nowrap;
    font-family: var(--font);
    user-select: none;
}

.file-preview {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0,255,65,0.06);
    border: 1px solid var(--accent-dim);
    padding: 3px 8px;
    font-size: 11px;
    color: var(--accent);
    max-width: 180px;
}
.file-preview span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.upload-progress { height: 2px; background: var(--border); }
.upload-progress-bar { height: 100%; background: var(--accent); width: 0%; box-shadow: var(--glow); transition: width 0.2s; }

/* === Modals === */
.modal { display: none; position: fixed; inset: 0; z-index: 200; align-items: center; justify-content: center; }
.modal.active { display: flex; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.85); }
.modal-content {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--accent-dim);
    padding: 22px;
    width: 90%;
    max-width: 420px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 0 40px rgba(0,255,65,0.12);
    animation: modalIn 0.2s ease;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.modal-header h3 { font-size: 15px; color: var(--text-bright); text-shadow: var(--glow-sm); letter-spacing: 2px; text-transform: uppercase; }
.modal-header h3::before { content: '// '; color: var(--accent-dim); }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 20px; cursor: pointer; font-family: var(--font); }
.modal-close:hover { color: var(--danger); }

.password-display {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--input-bg);
    border: 1px solid var(--accent-dim);
    padding: 10px 14px;
    margin: 10px 0;
}
.password-display code {
    flex: 1;
    font-size: 22px;
    letter-spacing: 4px;
    color: var(--accent);
    text-shadow: var(--glow);
    font-family: var(--font);
}

.text-muted { color: var(--text-muted); font-size: 12px; }
.text-warning { color: var(--warning); font-size: 12px; margin-top: 8px; }
.text-warning::before { content: '[!] '; }

hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }

.search-results { max-height: 200px; overflow-y: auto; }
.search-result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.1s;
}
.search-result-item:hover { border-color: var(--border); background: rgba(0,255,65,0.04); }
.search-result-name { font-size: 13px; color: var(--text-bright); }
.search-result-name::before { content: '# '; color: var(--accent-dim); }
.search-result-meta { font-size: 11px; color: var(--text-muted); }

.members-list { display: flex; flex-direction: column; gap: 4px; }
.member-item { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border: 1px solid var(--border); background: var(--input-bg); }
.member-avatar { width: 26px; height: 26px; border: 1px solid var(--accent-dim); display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--accent); font-weight: 700; }
.member-name { font-size: 13px; color: var(--text); }
.member-name::before { content: '@'; color: var(--accent-dim); }

/* Date divider */
.date-divider { text-align: center; color: var(--text-muted); font-size: 11px; padding: 8px 0; letter-spacing: 2px; }
.date-divider::before { content: '─── '; }
.date-divider::after  { content: ' ───'; }

/* Room created info */
.room-created-info p { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.room-created-info p::before { content: '# '; }

/* === Responsive === */
@media (max-width: 768px) {
    .sidebar { position: fixed; left: -280px; top: 0; z-index: 50; transition: left 0.2s; }
    .sidebar.open { left: 0; }
    .sidebar-toggle { display: block; }
    .back-btn { display: block; }
    .message { max-width: 92%; }
    .auth-container { padding: 24px 16px; }
}

/* Image preview */
.message-image { max-width: 100%; max-height: 260px; display: block; margin-top: 6px; border: 1px solid var(--border); cursor: pointer; }
.message-image:hover { border-color: var(--accent-dim); box-shadow: var(--glow); }

/* Lightbox */
.lightbox { display: none; position: fixed; inset: 0; z-index: 300; background: rgba(0,0,0,0.95); align-items: center; justify-content: center; cursor: pointer; }
.lightbox.active { display: flex; }
.lightbox img { max-width: 95%; max-height: 95vh; object-fit: contain; border: 1px solid var(--accent-dim); box-shadow: var(--glow); }