:root {
    --bg: #09090b;
    --fg: #fafafa;
    --accent: #60a5fa;
    --accent-glow: rgba(96, 165, 250, 0.5);
    --surface: #18181b;
}

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

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    flex: 1;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, #fff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-btn {
    background: transparent;
    color: var(--fg);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.login-btn:hover {
    background: var(--fg);
    color: var(--bg);
    transform: translateY(-1px);
}

.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(to bottom right, #fff, #71717a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    max-width: 800px;
}

p {
    font-size: 1.125rem;
    color: #a1a1aa;
    max-width: 600px;
    margin-bottom: 4rem;
    line-height: 1.6;
}

.voice-orb {
    position: relative;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.ring {
    position: absolute;
    border-radius: 50%;
    border: 2px solid var(--accent);
    opacity: 0;
    transition: all 0.3s ease;
}

.voice-orb.active .ring-1 {
    width: 140px;
    height: 140px;
    animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

.voice-orb.active .ring-2 {
    width: 170px;
    height: 170px;
    animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1) 0.5s;
}

.voice-orb.active .ring-3 {
    width: 200px;
    height: 200px;
    animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1) 1s;
}

@keyframes pulse-ring {
    0% { transform: scale(0.8); opacity: 0.8; }
    100% { transform: scale(1.3); opacity: 0; }
}

.mic-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--surface);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--accent);
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mic-btn svg {
    width: 32px;
    height: 32px;
}

.mic-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--accent-glow);
    background: #27272a;
}

.voice-orb.active .mic-btn {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 40px var(--accent-glow);
}

.status {
    font-size: 0.875rem;
    color: #71717a;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: fade-in 1s ease-in-out;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}