/* =========================================
   GLOBAL VARIABLES — NEON CYBER THEME
   ========================================= */
:root {
    --primary: #7b2cff;
    --primary-glow: rgba(123, 44, 255, 0.55);
    --accent: #84ff00;
    --accent-glow: rgba(132, 255, 0, 0.45);
    --cyan: #00e5ff;
    --danger: #ff3b3b;

    --bg-dark: #050508;
    --bg-panel: rgba(10, 10, 15, 0.65);
    --bg-sidebar: rgba(0, 0, 0, 0.55);

    --text-main: #ffffff;
    --text-dim: #9ca3af;

    --glass: rgba(255, 255, 255, 0.04);
    --border-soft: rgba(255, 255, 255, 0.08);

    --transition: all 0.25s cubic-bezier(0.25, 1, 0.5, 1);
}

/* =========================================
   RESET
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: radial-gradient(circle at top left, rgba(132,255,0,0.12), transparent 60%),
                radial-gradient(circle at bottom right, rgba(123,44,255,0.18), transparent 60%),
                #050508;
    color: var(--text-main);
    height: 100vh;
    display: flex;
    overflow: hidden;
}

/* =========================================
   SIDEBAR
   ========================================= */
#sidebar {
    width: 320px;
    background: var(--bg-sidebar);
    backdrop-filter: blur(18px);
    border-right: 1px solid var(--border-soft);
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 20px rgba(0,0,0,0.6);
}

.profile-section {
    padding: 24px;
    background: linear-gradient(135deg, rgba(123,44,255,0.15), rgba(132,255,0,0.08));
    border-bottom: 1px solid var(--border-soft);
}

.profile-section h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 10px;
}

#myIdDisplay {
    background: var(--glass);
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--border-soft);
    color: var(--accent);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: monospace;
    font-size: 0.85rem;
    box-shadow: 0 0 12px rgba(132,255,0,0.25);
}

.icon-btn-small {
    background: transparent;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.icon-btn-small:hover {
    color: var(--primary);
    transform: scale(1.15);
}

/* SEARCH + ADD FRIEND */
.input-group input,
.add-friend-box input {
    width: 100%;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-soft);
    padding: 12px 16px;
    border-radius: 12px;
    color: white;
    outline: none;
    transition: var(--transition);
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

button.btn-primary {
    background: var(--primary);
    border: none;
    padding: 12px;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 0 14px var(--primary-glow);
}

button.btn-primary:hover {
    background: var(--accent);
    color: black;
    box-shadow: 0 0 18px var(--accent-glow);
}

/* FRIEND LIST */
#friendsList {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.friend-item {
    padding: 14px;
    margin-bottom: 10px;
    border-radius: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.02);
    border: 1px solid transparent;
    transition: var(--transition);
}

.friend-item:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

.friend-item.active {
    background: rgba(123,44,255,0.15);
    border-color: var(--primary);
    box-shadow: 0 0 18px var(--primary-glow);
}

.avatar-circle {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    box-shadow: 0 0 12px var(--primary-glow);
}

/* =========================================
   MAIN CHAT
   ========================================= */
#main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-dark);
    position: relative;
}

/* HEADER */
#chat-header {
    padding: 20px 30px;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* MESSAGES */
#messagesContainer {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.message {
    max-width: 65%;
    padding: 14px 20px;
    border-radius: 18px;
    font-size: 0.95rem;
    line-height: 1.45;
    animation: fadeIn 0.25s ease;
}

.message.received {
    align-self: flex-start;
    background: rgba(255,255,255,0.05);
    border-left: 3px solid var(--primary);
}

.message.sent {
    align-self: flex-end;
    background: var(--primary);
    color: white;
    border-right: 3px solid var(--accent);
    box-shadow: 0 0 12px var(--primary-glow);
}

/* INPUT AREA */
#input-area {
    padding: 22px 30px;
    background: rgba(0,0,0,0.55);
    border-top: 1px solid var(--border-soft);
}

.input-wrapper {
    display: flex;
    gap: 12px;
}

#msgInput {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-soft);
    padding: 14px;
    border-radius: 12px;
    color: white;
    resize: none;
    transition: var(--transition);
}

#msgInput:focus {
    border-color: var(--accent);
    box-shadow: 0 0 14px var(--accent-glow);
}

.send-btn {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--accent);
    border: none;
    color: black;
    cursor: pointer;
    font-size: 1.3rem;
    transition: var(--transition);
    box-shadow: 0 0 14px var(--accent-glow);
}

.send-btn:hover {
    transform: scale(1.08);
    background: var(--primary);
    color: white;
    box-shadow: 0 0 18px var(--primary-glow);
}

/* =========================================
   TYPING INDICATOR
   ========================================= */
.typing-bubble {
    position: absolute;
    bottom: 100px;
    left: 40px;
    background: rgba(255,255,255,0.05);
    padding: 10px 16px;
    border-radius: 12px;
    border: 1px solid var(--border-soft);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-dim);
    box-shadow: 0 0 12px rgba(255,255,255,0.1);
}

/* =========================================
   VIDEO CALL OVERLAY
   ========================================= */
#videoCallOverlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
}

.video-grid video {
    width: 380px;
    border-radius: 14px;
    border: 2px solid var(--primary);
    box-shadow: 0 0 20px var(--primary-glow);
}

.btn-danger {
    background: var(--danger);
    border: none;
    padding: 12px 20px;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: #ff5555;
    box-shadow: 0 0 14px rgba(255,0,0,0.4);
}