* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

:root {
    --bg-primary:    #0f0f23;
    --bg-secondary:  #1a1a2e;
    --bg-card:       #16213e;
    --accent:        #e94560;
    --accent-hover:  #ff6b6b;
    --success:       #00d9ff;
    --text-primary:  #eaeaea;
    --text-secondary:#a0a0a0;
    --border:        #2a2a4a;
    --shadow:        0 8px 32px rgba(0,0,0,0.4);
    --chat-w:        300px;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ====== ЭКРАНЫ ====== */
.screen { display: none; min-height: 100vh; min-height: 100dvh; }
.screen.active { display: flex; flex-direction: column; }

/* ====== ВХОД ====== */
#login-screen {
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.logo { font-size: 4rem; margin-bottom: 0.5rem; }

.login-card h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, var(--accent), var(--success));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.input-group { margin-bottom: 1.5rem; text-align: left; }
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.input-group input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    transition: border-color 0.3s;
    -webkit-appearance: none;
}
.input-group input:focus { outline: none; border-color: var(--accent); }

.btn-primary {
    width: 100%;
    padding: 1.1rem;
    background: linear-gradient(135deg, var(--accent), #c73e54);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    -webkit-appearance: none;
    min-height: 48px;
    transition: transform 0.15s;
}
.btn-primary:active { transform: scale(0.98); }

.hint { margin-top: 1.5rem; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* ====== ЭКРАН ЗВОНКА ====== */
#call-screen { padding: 0; overflow: hidden; }

.call-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    gap: 0.8rem;
    flex-shrink: 0;
    z-index: 10;
}

.header-left { display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; }
.header-right { display: flex; align-items: center; gap: 0.8rem; flex-shrink: 0; }

.room-info { display: flex; align-items: center; gap: 0.4rem; }
.room-label { color: var(--text-secondary); font-size: 0.85rem; }
.room-name  { font-weight: 600; color: var(--success); font-family: monospace; font-size: 1rem; }

.participants-count {
    background: var(--bg-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
}
#participants-badge { color: var(--success); font-weight: 700; }

.btn-danger {
    padding: 0.6rem 1rem;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 40px;
    -webkit-appearance: none;
    transition: background 0.2s;
}
.btn-danger:active { background: var(--accent-hover); }

/* ====== ОСНОВНОЙ КОНТЕНТ ====== */
.main-content {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.call-area {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    position: relative;
}

/* ====== УЧАСТНИКИ ====== */
.videos-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    flex: 1;
    justify-content: center;
    align-content: flex-start;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.participant {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    border: 2px solid var(--border);
    min-width: 140px;
    transition: border-color 0.3s;
}
.participant:hover { border-color: var(--accent); }

.participant-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--success));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 0.8rem;
    color: white;
}

.participant-name { font-weight: 600; margin-bottom: 0.8rem; font-size: 0.95rem; }

.local-audio-bars, .audio-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 3px;
    height: 32px;
}

.bar {
    width: 5px;
    background: linear-gradient(to top, var(--accent), var(--success));
    border-radius: 3px;
    transition: height 0.05s ease;
    height: 4px;
}

.remote-audios { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }

/* ====== КОНТРОЛЫ ====== */
.call-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.ctrl-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: white;
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-appearance: none;
    min-height: 48px;
    min-width: 48px;
    position: relative;
    transition: all 0.2s;
}
.ctrl-btn:active { transform: scale(0.93); }
.ctrl-btn.muted  { background: var(--accent); border-color: var(--accent); }
.ctrl-btn.active { background: var(--success); border-color: var(--success); }
.btn-icon { display: block; line-height: 1; }

/* бейдж непрочитанных на кнопке чата */
.chat-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    min-width: 17px;
    height: 17px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 3px;
    pointer-events: none;
    border: 2px solid var(--bg-primary);
}
.chat-badge.hidden { display: none; }

/* ====== СТАТУС ====== */
.status-bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.6rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 1px solid var(--border);
    font-size: 0.8rem;
}
.status-indicator { width: 8px; height: 8px; border-radius: 50%; }
.status-indicator.connecting { background: #f0a500; animation: pulse 1.5s infinite; }
.status-indicator.connected  { background: var(--success); box-shadow: 0 0 8px var(--success); }
.status-indicator.error      { background: var(--accent); }

/* ====== ЧАТ ====== */
.chat-panel {
    width: 0;
    min-width: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    transition: width 0.25s ease, min-width 0.25s ease;
    flex-shrink: 0;
}

.chat-panel.open {
    width: var(--chat-w);
    min-width: var(--chat-w);
}

/* шапка чата — повторяет стиль call-header */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 0.9rem;
    flex-shrink: 0;
    color: var(--text-primary);
}

.close-chat-btn {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.2rem 0.55rem;
    border-radius: 8px;
    transition: all 0.2s;
    line-height: 1.4;
}
.close-chat-btn:hover { border-color: var(--accent); color: var(--text-primary); }

/* лента сообщений */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.chat-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: auto;
    padding: 2rem 1rem;
    line-height: 1.6;
}

/* сообщения */
.chat-msg { display: flex; flex-direction: column; max-width: 82%; }
.chat-msg.mine   { align-self: flex-end;   align-items: flex-end; }
.chat-msg.theirs { align-self: flex-start; align-items: flex-start; }

.msg-author {
    font-size: 0.72rem;
    color: var(--success);
    font-weight: 600;
    margin-bottom: 0.2rem;
    padding: 0 0.5rem;
}

.msg-bubble {
    padding: 0.55rem 0.85rem;
    border-radius: 16px;
    font-size: 0.88rem;
    line-height: 1.45;
    word-break: break-word;
    white-space: pre-wrap;
}

/* своё сообщение — акцентный градиент как у кнопки входа */
.chat-msg.mine .msg-bubble {
    background: linear-gradient(135deg, var(--accent), #c73e54);
    color: white;
    border-bottom-right-radius: 4px;
}

/* чужое — карточный стиль */
.chat-msg.theirs .msg-bubble {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
    color: var(--text-primary);
}

.msg-time {
    font-size: 0.68rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
    padding: 0 0.5rem;
}

/* индикатор печати */
.typing-indicator {
    padding: 0.3rem 0.75rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-style: italic;
    min-height: 1.4rem;
    flex-shrink: 0;
}
.typing-indicator.hidden { visibility: hidden; }

/* поле ввода — стиль input-group */
.chat-input-area {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.75rem;
    padding-bottom: max(0.65rem, env(safe-area-inset-bottom));
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.chat-input-area input {
    flex: 1;
    padding: 0.6rem 0.9rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 0.88rem;
    -webkit-appearance: none;
    transition: border-color 0.25s;
    min-width: 0;
}
.chat-input-area input:focus { outline: none; border-color: var(--accent); }

.send-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #c73e54);
    border: none;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, opacity 0.2s;
}
.send-btn:active { transform: scale(0.92); opacity: 0.85; }

/* ====== ДЕМОНСТРАЦИЯ ЭКРАНА ====== */
.screen-share-container {
    position: fixed;
    inset: 0;
    z-index: 50;
    pointer-events: none;
    display: none;
}
.screen-share-container.active { display: block; pointer-events: auto; }

.screen-preview {
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--success);
    animation: fadeIn 0.4s ease;
    position: relative;
}

.screen-preview.local {
    position: fixed;
    bottom: 100px;
    right: 1rem;
    width: 280px;
    height: 158px;
    z-index: 100;
    box-shadow: var(--shadow);
    border-radius: 12px;
}
.screen-preview.local video { width: 100%; height: 100%; object-fit: contain; }
.screen-preview.local .screen-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    font-size: 0.8rem;
}

.screen-preview.remote {
    width: 100%; height: 100%;
    display: flex; flex-direction: column;
    border-radius: 0;
}

.screen-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.screen-title { font-size: 0.9rem; font-weight: 600; color: var(--success); }

.fullscreen-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.35rem 0.7rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s;
    min-height: 34px;
}
.fullscreen-btn:active { background: var(--accent); border-color: var(--accent); }

.screen-content { flex: 1; position: relative; background: #000; min-height: 0; }
.screen-preview.remote video { width: 100%; height: 100%; object-fit: contain; display: block; }

.screen-preview:fullscreen {
    position: fixed; inset: 0;
    width: 100vw; height: 100vh;
    z-index: 9999; border-radius: 0;
    display: flex; flex-direction: column;
}
.screen-preview:fullscreen .screen-header {
    position: absolute; top: 0; left: 0; right: 0;
    z-index: 10; opacity: 0;
    transition: opacity 0.3s;
    background: linear-gradient(rgba(0,0,0,.7), transparent);
    border: none;
}
.screen-preview:fullscreen:hover .screen-header { opacity: 1; }

/* ====== АНИМАЦИИ ====== */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
    0%,100% { box-shadow: 0 0 0 0 rgba(0,217,255,.4); }
    50%      { box-shadow: 0 0 0 12px rgba(0,217,255,0); }
}

/* ====== МОБИЛЬНАЯ АДАПТАЦИЯ ====== */
@media (max-width: 640px) {
    /* на мобиле чат на весь экран поверх */
    .chat-panel.open {
        position: fixed;
        inset: 0;
        z-index: 200;
        width: 100vw !important;
        min-width: 100vw !important;
    }

    .login-card { padding: 2rem 1.5rem; border-radius: 16px; }
    .logo { font-size: 3rem; }
    .login-card h1 { font-size: 1.5rem; }
    .call-header { padding: 0.6rem 0.8rem; }
    .room-name { font-size: 0.9rem; }
    .participant { padding: 1rem; min-width: 120px; border-radius: 12px; }
    .participant-avatar { width: 48px; height: 48px; font-size: 1.4rem; }
    .participant-name { font-size: 0.85rem; }
    .videos-container { padding: 0.8rem; gap: 0.8rem; }
    .screen-preview.local { width: 200px; height: 112px; bottom: 90px; right: 0.5rem; }
    .ctrl-btn { width: 48px; height: 48px; font-size: 1.2rem; }
    .call-controls { padding: 0.8rem; gap: 0.8rem; }
}

@media (max-width: 360px) {
    .login-card { padding: 1.5rem 1rem; }
    .input-group input, .btn-primary { padding: 0.85rem; }
    .participant { min-width: 100px; padding: 0.8rem; }
}

@media (orientation: landscape) and (max-height: 500px) {
    .call-header { padding: 0.4rem 0.8rem; }
    .videos-container { flex-direction: row; align-items: center; }
    .participant { min-width: 100px; padding: 0.8rem; }
    .participant-avatar { width: 40px; height: 40px; font-size: 1.2rem; }
    .call-controls { padding: 0.5rem; }
    .ctrl-btn { width: 40px; height: 40px; }
}