/* ── Theme Variables ── */
:root {
    --primary: #6C5CE7;
    --primary-dark: #A29BFE;
    --secondary: #E8E5FF;
    --accent: #00D2FF;
    --success: #00B894;
    --danger: #FF6B6B;
    --surface: #F8F9FE;
    --surface-dark: #16213E;
    --card-light: #FFFFFF;
    --card-dark: #1A1A2E;
    --off-black: #0F0E2E;
    --gray-100: #E1E1E1;
    --gray-300: #ACACAC;
    --gray-400: #919191;
    --gray-500: #6E6E6E;
    --text: #0F0E2E;
    --text-muted: #6E6E6E;
    --separator: #E1E1E1;
    --bg: var(--surface);
    --card: var(--card-light);
    --bubble-mine: var(--primary);
    --bubble-other: #F0EEFF;
    --bubble-other-text: #1A1A2E;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: var(--off-black);
        --card: var(--card-dark);
        --text: #E8E5FF;
        --text-muted: #ACACAC;
        --separator: #2A2A3E;
        --bubble-other: #2A2854;
        --bubble-other-text: #E8E5FF;
    }
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; background: var(--bg); color: var(--text); }

/* ── App Layout ── */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 600px;
    margin: 0 auto;
}

.page-content {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* ── Tab Bar ── */
.tab-bar {
    display: flex;
    background: var(--card);
    order: 1;
    padding: 4px 8px 0;
    box-shadow: 0 -1px 8px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
    .tab-bar { box-shadow: 0 -1px 8px rgba(0, 0, 0, 0.3); }
}

.tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 0 10px;
    text-decoration: none;
    color: var(--gray-400);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: color 0.25s ease, transform 0.15s ease;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

.tab-item:hover { color: var(--primary); }
.tab-item.active { color: var(--primary); font-weight: 600; }

.tab-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    width: 50%;
    height: 3px;
    background: var(--primary);
    border-radius: 0 0 3px 3px;
}

@media (prefers-color-scheme: dark) {
    .tab-item.active { color: var(--primary-dark); }
    .tab-item.active::before { background: var(--primary-dark); }
    .tab-item:hover { color: var(--primary-dark); }
}

.tab-icon { font-size: 22px; line-height: 1; transition: transform 0.15s ease; }
.tab-item.active .tab-icon { transform: scale(1.1); }
.tab-label { margin-top: 3px; }

/* ── Shared Controls ── */
.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.5; cursor: default; }

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    cursor: pointer;
    width: 100%;
    transition: background 0.2s;
}
.btn-danger:hover { background: rgba(255, 107, 107, 0.1); }

/* ── Chat Page ── */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--bg);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-bubble {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 16px;
    line-height: 1.45;
    font-size: 15px;
}

.chat-bubble.mine {
    align-self: flex-end;
    background: var(--bubble-mine);
    color: white;
    border-bottom-right-radius: 4px;
}

.chat-bubble.theirs {
    align-self: flex-start;
    background: var(--bubble-other);
    color: var(--bubble-other-text);
    border-bottom-left-radius: 4px;
}

.bubble-time {
    font-size: 11px;
    opacity: 0.6;
    margin-top: 4px;
}

.chat-bubble.mine .bubble-time { text-align: right; }

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}
.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-400);
    animation: typing 1.4s ease-in-out infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* Input bar */
.chat-input-bar {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: var(--card);
    border-top: 1px solid var(--separator);
}

.chat-input-bar input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--separator);
    border-radius: 20px;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    outline: none;
}
.chat-input-bar input:focus { border-color: var(--primary); }
.chat-input-bar input::placeholder { color: var(--gray-400); }

.send-button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
.send-button:disabled { opacity: 0.4; cursor: default; }

/* ── Settings Page ── */
.settings-container {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.settings-section h3 {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    padding: 0 4px;
}

@media (prefers-color-scheme: dark) {
    .settings-section h3 { color: var(--primary-dark); }
}

.settings-footer {
    font-size: 12px;
    color: var(--gray-400);
    margin-bottom: 8px;
    padding: 0 4px;
}

.settings-card {
    background: var(--card);
    border-radius: 10px;
    overflow: hidden;
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--separator);
}
.settings-row:last-child { border-bottom: none; }

.settings-label {
    font-size: 14px;
    font-weight: 500;
    flex-shrink: 0;
    margin-right: 12px;
}

.settings-value {
    font-size: 14px;
    color: var(--text-muted);
    text-align: right;
}

.settings-card input,
.settings-card select {
    flex: 1;
    text-align: right;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 14px;
    outline: none;
    min-width: 0;
}

.settings-card select {
    cursor: pointer;
    appearance: auto;
}

.settings-card .btn-danger {
    margin: 12px 16px;
    width: calc(100% - 32px);
}

/* ── Aura Page ── */
.aura-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--off-black);
    padding: 20px;
    min-height: 0;
}

.aura-orb-area {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.aura-outer-ring {
    position: absolute;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    background: radial-gradient(circle, transparent 60%, var(--primary) 100%);
    opacity: 0.3;
    transition: border-color 0.5s, opacity 0.5s;
}

.aura-inner-orb {
    position: absolute;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary), transparent);
    opacity: 0.5;
    transition: background 0.5s, opacity 0.5s;
}

.aura-ripple {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    opacity: 0;
    pointer-events: none;
}

/* State animations */
.aura-outer-ring.idle { animation: idle-pulse 3s ease-in-out infinite; }
.aura-inner-orb.idle { animation: idle-orb 3s ease-in-out infinite; }

.aura-outer-ring.listening {
    border-color: #00D2FF;
    background: radial-gradient(circle, transparent 60%, #00D2FF 100%);
    opacity: 0.6;
    animation: listen-ring 1.5s ease-out infinite;
}
.aura-inner-orb.listening {
    background: radial-gradient(circle, #00D2FF, transparent);
    opacity: 0.7;
    animation: listen-orb 1.5s ease-out infinite;
}
.aura-ripple.listening {
    border-color: #00D2FF;
    animation: ripple 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.aura-outer-ring.thinking {
    border-color: #A29BFE;
    background: radial-gradient(circle, transparent 60%, #A29BFE 100%);
    animation: think-spin 2s linear infinite;
}
.aura-inner-orb.thinking {
    background: radial-gradient(circle, #A29BFE, transparent);
    animation: think-orb 2s ease-in-out infinite;
}

.aura-outer-ring.responding {
    border-color: #00B894;
    background: radial-gradient(circle, transparent 60%, #00B894 100%);
    opacity: 0.7;
    animation: respond-ring 1s ease-in-out infinite;
}
.aura-inner-orb.responding {
    background: radial-gradient(circle, #00B894, transparent);
    opacity: 0.8;
    animation: respond-orb 1s ease-in-out infinite;
}

/* Idle */
@keyframes idle-pulse {
    0%, 100% { transform: scale(0.9); opacity: 0.2; }
    50% { transform: scale(1.0); opacity: 0.35; }
}
@keyframes idle-orb {
    0%, 100% { transform: scale(0.85); opacity: 0.3; }
    50% { transform: scale(1.0); opacity: 0.5; }
}

/* Listening */
@keyframes listen-ring {
    0%, 100% { transform: scale(0.95); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}
@keyframes listen-orb {
    0%, 100% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.1); opacity: 0.9; }
}
@keyframes ripple {
    0% { transform: scale(0.6); opacity: 0.8; }
    100% { transform: scale(1.4); opacity: 0; }
}

/* Thinking */
@keyframes think-spin {
    0% { transform: rotate(0deg); opacity: 0.5; }
    50% { opacity: 0.8; }
    100% { transform: rotate(360deg); opacity: 0.5; }
}
@keyframes think-orb {
    0%, 100% { transform: scale(0.8); opacity: 0.5; }
    25% { transform: scale(0.95); opacity: 0.8; }
    75% { transform: scale(0.85); opacity: 0.6; }
}

/* Responding */
@keyframes respond-ring {
    0%, 100% { transform: scale(1.0); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 1.0; }
}
@keyframes respond-orb {
    0%, 100% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1.0; }
}

.aura-status {
    font-size: 24px;
    font-weight: 700;
    margin-top: 32px;
    text-align: center;
}

.aura-response-panel {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 560px;
    background: rgba(26, 26, 46, 0.9);
    border-radius: 16px;
    padding: 16px 20px;
    color: rgba(255, 255, 255, 0.8);
}

.aura-response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #A29BFE;
}

.aura-dismiss {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
}

.aura-response-panel p {
    font-size: 15px;
    line-height: 1.5;
}