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

:root {
    --bg:        #050810;
    --panel:     #0a0f1e;
    --border:    #1a2a4a;
    --cyan:      #00d4ff;
    --cyan-dim:  #0066aa;
    --amber:     #e8a020;
    --amber-dim: #7a4a00;
    --text:      #c8e0f0;
    --dim:       #4a6a8a;
    --glow:      0 0 20px rgba(0, 212, 255, 0.3);
    --robot-w:   110px;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Courier New', monospace;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
}

/* ── Page layout ── */
.page-wrap {
    display: flex;
    gap: 60px;
    align-items: flex-start;
    width: 100%;
    max-width: 980px;
}

.controls-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ══════════════════════════════════════
   TARS ROBOT
══════════════════════════════════════ */
.tars-robot-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.tars-robot {
    position: relative;
}

.tars-body {
    display: flex;
    flex-direction: column;
    gap: 3px;
    width: var(--robot-w);
    filter: drop-shadow(0 0 18px rgba(0,0,0,0.8));
}

/* Each panel */
.tars-panel {
    width: 100%;
    height: 72px;
    background: linear-gradient(135deg, #1c1c22 0%, #111118 50%, #0e0e14 100%);
    border: 1px solid #2a2a38;
    position: relative;
    transform-origin: center;
    transition: transform 0.5s cubic-bezier(0.4,0,0.2,1),
                box-shadow 0.4s;
}

.panel-inner {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* Metallic sheen */
.tars-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg,
        transparent 30%,
        rgba(255,255,255,0.03) 50%,
        transparent 70%);
    pointer-events: none;
}

/* Panel horizontal lines */
.panel-line {
    position: absolute;
    left: 10px; right: 10px;
    height: 1px;
    background: rgba(255,255,255,0.06);
}
.panel-line:nth-child(1) { top: 30%; }
.panel-line:nth-child(2) { top: 65%; }

/* Corner lights */
.corner-light {
    position: absolute;
    width: 4px; height: 4px;
    background: var(--amber-dim);
    border-radius: 50%;
    transition: background 0.3s, box-shadow 0.3s;
}
.corner-light.tl { top: 5px;  left: 5px;  }
.corner-light.tr { top: 5px;  right: 5px; }
.corner-light.bl { bottom: 5px; left: 5px;  }
.corner-light.br { bottom: 5px; right: 5px; }

/* ── Eye / sensor panel (p2) ── */
.eye-strip {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    height: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.eye {
    width: 100%;
    height: 3px;
    background: var(--amber-dim);
    border-radius: 2px;
    transition: background 0.3s, box-shadow 0.3s, height 0.3s;
}

.eye-glow {
    position: absolute;
    inset: -6px;
    background: radial-gradient(ellipse, rgba(232,160,32,0.15) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}

/* ── Grid detail (p3) ── */
.panel-grid {
    position: absolute;
    bottom: 12px; left: 50%;
    transform: translateX(-50%);
    display: grid;
    grid-template-columns: repeat(3, 6px);
    grid-template-rows: repeat(2, 6px);
    gap: 3px;
}
.panel-grid span {
    width: 6px; height: 6px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
}

/* ── Shadow ── */
.tars-shadow {
    width: 80px;
    height: 10px;
    background: radial-gradient(ellipse, rgba(0,0,0,0.7) 0%, transparent 70%);
    margin: 4px auto 0;
}

/* ── Robot state label ── */
.robot-state {
    font-size: 0.55rem;
    letter-spacing: 0.25em;
    color: var(--amber-dim);
    text-align: center;
    transition: color 0.3s;
}

/* ══ ROBOT STATES ══════════════════════ */

/* LISTENING — panels slightly spread */
.tars-robot.listening .tars-panel.p1 { transform: translateY(-3px) rotate(-0.5deg); }
.tars-robot.listening .tars-panel.p4 { transform: translateY( 3px) rotate( 0.5deg); }
.tars-robot.listening .corner-light  { background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.tars-robot.listening .eye           { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); height: 4px; }
.tars-robot.listening .eye-glow      { opacity: 1; background: radial-gradient(ellipse, rgba(0,212,255,0.2) 0%, transparent 70%); }
.tars-robot.listening .robot-state   { color: var(--cyan); }

/* THINKING — panels rotate slightly, amber glow */
.tars-robot.thinking .tars-panel.p1 { transform: rotate(-1.5deg) translateX(-3px); }
.tars-robot.thinking .tars-panel.p2 { transform: rotate( 1deg); }
.tars-robot.thinking .tars-panel.p3 { transform: rotate(-1deg); }
.tars-robot.thinking .tars-panel.p4 { transform: rotate( 1.5deg) translateX(3px); }
.tars-robot.thinking .corner-light  { background: var(--amber); box-shadow: 0 0 5px var(--amber); }
.tars-robot.thinking .eye           { background: var(--amber); box-shadow: 0 0 10px var(--amber); }
.tars-robot.thinking .eye-glow      { opacity: 1; }
.tars-robot.thinking .robot-state   { color: var(--amber); }

/* SPEAKING — panels breathe in sync */
.tars-robot.speaking .tars-panel    { animation: panel-breathe 0.8s ease-in-out infinite alternate; }
.tars-robot.speaking .tars-panel.p2 { animation-delay: 0.1s; }
.tars-robot.speaking .tars-panel.p3 { animation-delay: 0.2s; }
.tars-robot.speaking .tars-panel.p4 { animation-delay: 0.3s; }
.tars-robot.speaking .eye           { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); height: 5px;
                                       animation: eye-pulse 0.8s ease-in-out infinite alternate; }
.tars-robot.speaking .eye-glow      { opacity: 1; background: radial-gradient(ellipse, rgba(0,212,255,0.25) 0%, transparent 70%); }
.tars-robot.speaking .corner-light  { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.tars-robot.speaking .robot-state   { color: var(--cyan); }

@keyframes panel-breathe {
    from { box-shadow: none; }
    to   { box-shadow: 0 0 10px rgba(0,212,255,0.2); border-color: #2a4a6a; }
}

@keyframes eye-pulse {
    from { box-shadow: 0 0 6px var(--cyan);  height: 4px; }
    to   { box-shadow: 0 0 16px var(--cyan); height: 6px; }
}

/* Idle breathing */
.tars-body {
    animation: idle-float 4s ease-in-out infinite;
}
@keyframes idle-float {
    0%, 100% { transform: translateY(0);   }
    50%       { transform: translateY(-5px); }
}

/* ══════════════════════════════════════
   HEADER
══════════════════════════════════════ */
header {
    text-align: center;
    margin-bottom: 30px;
}

.tars-logo {
    font-size: 2.6rem;
    font-weight: 900;
    letter-spacing: 0.4em;
    color: var(--cyan);
    text-shadow: var(--glow);
}

.tars-sub {
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    color: var(--dim);
    margin-top: 5px;
}

.settings {
    display: flex;
    gap: 14px;
    justify-content: center;
    margin-top: 12px;
    flex-wrap: wrap;
}

.setting {
    font-size: 0.6rem;
    color: var(--dim);
    border: 1px solid var(--border);
    padding: 3px 10px;
    letter-spacing: 0.1em;
}

/* ══════════════════════════════════════
   MAIN PANEL
══════════════════════════════════════ */
.panel {
    width: 100%;
    max-width: 480px;
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 26px;
}

/* ── Visualizer ── */
.visualizer-wrap {
    display: flex;
    justify-content: center;
    height: 36px;
    align-items: flex-end;
    margin-bottom: 26px;
}

#visualizer { display: flex; gap: 4px; align-items: flex-end; }

.bar {
    width: 4px;
    background: var(--cyan-dim);
    border-radius: 2px;
    height: 5px;
}

#visualizer.active .bar { animation: bounce 0.6s ease-in-out infinite alternate; }
#visualizer.active .bar:nth-child(2) { animation-delay: 0.10s; }
#visualizer.active .bar:nth-child(3) { animation-delay: 0.20s; }
#visualizer.active .bar:nth-child(4) { animation-delay: 0.15s; }
#visualizer.active .bar:nth-child(5) { animation-delay: 0.05s; }
#visualizer.active .bar:nth-child(6) { animation-delay: 0.25s; }
#visualizer.active .bar:nth-child(7) { animation-delay: 0.10s; }

@keyframes bounce {
    from { height: 4px;  background: var(--cyan-dim); }
    to   { height: 28px; background: var(--cyan);     }
}

/* ── Talk button ── */
.btn-wrap { display: flex; justify-content: center; margin-bottom: 20px; }

#talkBtn {
    width: 84px; height: 84px;
    border-radius: 50%;
    border: 2px solid var(--cyan-dim);
    background: transparent;
    color: var(--cyan);
    font-family: 'Courier New', monospace;
    font-size: 0.58rem;
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

#talkBtn:hover { border-color: var(--cyan); box-shadow: var(--glow); }

#talkBtn.listening {
    border-color: var(--cyan);
    box-shadow: 0 0 30px rgba(0,212,255,0.6);
    animation: pulse 1s ease-in-out infinite;
}
#talkBtn.thinking  { border-color: var(--amber); color: var(--amber); box-shadow: 0 0 20px rgba(232,160,32,0.3); }
#talkBtn.speaking  { border-color: var(--cyan); box-shadow: var(--glow); }

@keyframes pulse {
    0%,100% { box-shadow: 0 0 20px rgba(0,212,255,0.4); }
    50%      { box-shadow: 0 0 40px rgba(0,212,255,0.8); }
}

/* ── Status ── */
#status {
    text-align: center;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--dim);
    margin-bottom: 20px;
    text-transform: uppercase;
}

/* ── Always On toggle ── */
.toggle-wrap { display: flex; justify-content: center; margin-bottom: 20px; }

#toggleBtn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--dim);
    font-family: 'Courier New', monospace;
    font-size: 0.58rem;
    letter-spacing: 0.2em;
    padding: 5px 18px;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}
#toggleBtn:hover   { border-color: var(--cyan-dim); color: var(--text); }
#toggleBtn.active  {
    border-color: var(--cyan); color: var(--cyan);
    box-shadow: 0 0 12px rgba(0,212,255,0.25);
    animation: pulse 2s ease-in-out infinite;
}

/* ── Conversation ── */
.conversation {
    border-top: 1px solid var(--border);
    padding-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.msg-label {
    font-size: 0.58rem;
    letter-spacing: 0.2em;
    color: var(--dim);
    margin-bottom: 3px;
    text-transform: uppercase;
}

.msg-text {
    font-size: 0.88rem;
    line-height: 1.6;
    opacity: 0;
    transition: opacity 0.4s;
    min-height: 1.4em;
}

#transcript { color: var(--text); }
#response   { color: var(--cyan); text-shadow: 0 0 10px rgba(0,212,255,0.15); }

/* ── Footer ── */
footer {
    margin-top: 18px;
    font-size: 0.58rem;
    color: var(--border);
    letter-spacing: 0.1em;
}

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 700px) {
    .page-wrap {
        flex-direction: column;
        align-items: center;
    }
    .tars-robot-wrap {
        flex-direction: row;
        gap: 20px;
    }
    .tars-body { animation: none; }
}