:root {
    --bg-1: #0e1224;
    --bg-2: #12243f;
    --panel: rgba(16, 24, 44, 0.72);
    --panel-border: rgba(255, 255, 255, 0.2);
    --text-1: #f7fbff;
    --text-2: #c8d8ef;
    --aqua: #2ed8c3;
    --sky: #4ea6ff;
    --sun: #ffb24a;
    --coral: #ff6a6a;
    --mint: #bdfcdf;
    --user-bubble: linear-gradient(140deg, #ff7d53 0%, #ffa654 55%, #ffd16c 100%);
    --bot-bubble: linear-gradient(140deg, #1d3f68 0%, #255182 55%, #2f6b9f 100%);
    --shadow: 0 24px 50px rgba(4, 8, 20, 0.45);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    height: 100%;
}

body {
    position: relative;
    overflow: hidden;
    font-family: "Plus Jakarta Sans", sans-serif;
    color: var(--text-1);
    background:
        radial-gradient(circle at 8% 12%, rgba(78, 166, 255, 0.45), transparent 34%),
        radial-gradient(circle at 92% 88%, rgba(255, 106, 106, 0.35), transparent 37%),
        linear-gradient(130deg, var(--bg-1) 0%, #152847 48%, var(--bg-2) 100%);
}

.bg-grid {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(circle at center, black 45%, transparent 85%);
}

.bg-orb {
    position: fixed;
    width: 34rem;
    height: 34rem;
    border-radius: 999px;
    filter: blur(52px);
    opacity: 0.55;
    pointer-events: none;
    animation: pulse 7s ease-in-out infinite;
}

.orb-one {
    top: -16rem;
    left: -10rem;
    background: linear-gradient(180deg, #27d8cc, #3f92ff);
}

.orb-two {
    right: -11rem;
    bottom: -14rem;
    background: linear-gradient(180deg, #ff8f4d, #ff5f74);
    animation-delay: 1.8s;
}

.shell {
    position: relative;
    z-index: 1;
    max-width: 1160px;
    height: 100vh;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 1.5rem;
    align-items: stretch;
}

.brand-panel,
.chat-panel {
    position: relative;
    border-radius: 28px;
    backdrop-filter: blur(14px);
    background: var(--panel);
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow);
}

.brand-panel::before,
.chat-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(120deg, rgba(46, 216, 195, 0.7), rgba(255, 178, 74, 0.6), rgba(78, 166, 255, 0.7));
    -webkit-mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.brand-panel {
    padding: 2.2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    animation: riseIn 650ms ease;
}

.kicker {
    margin: 0 0 0.55rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--mint);
}

.brand-panel h1 {
    margin: 0;
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(2.2rem, 4vw, 3.25rem);
    line-height: 1.05;
    letter-spacing: -0.02em;
    background: linear-gradient(100deg, #ffffff 0%, #9be6ff 40%, #ffd8a2 100%);
    -webkit-background-clip: text;
    color: transparent;
}

.tagline {
    margin: 0.62rem 0 0;
    color: var(--text-2);
    font-size: 1rem;
}

.description {
    margin: 1.25rem 0 0;
    line-height: 1.68;
    color: #e8f3ff;
}

.chips {
    margin-top: 1.55rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.7rem;
}

.chip {
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 999px;
    background: linear-gradient(130deg, rgba(57, 97, 161, 0.72), rgba(33, 68, 131, 0.72));
    color: #e7f6ff;
    padding: 0.54rem 0.92rem;
    font-size: 0.86rem;
    text-align: center;
    cursor: pointer;
    transition: transform 170ms ease, box-shadow 170ms ease, border-color 170ms ease;
}

.chip:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 12px 20px rgba(27, 55, 99, 0.45);
}

.chat-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    animation: riseIn 760ms ease;
}

.chat-header {
    padding: 1.2rem 1.35rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.chat-title {
    margin: 0;
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
}

.chat-subtitle {
    margin: 0.28rem 0 0;
    color: var(--text-2);
    font-size: 0.86rem;
}

.status-pill {
    border-radius: 999px;
    border: 1px solid rgba(180, 252, 223, 0.7);
    color: #d7ffe8;
    background: linear-gradient(140deg, rgba(29, 97, 72, 0.72), rgba(20, 70, 60, 0.72));
    padding: 0.35rem 0.72rem;
    font-size: 0.78rem;
    white-space: nowrap;
}

.status-pill.thinking {
    border-color: rgba(255, 205, 132, 0.75);
    color: #fff2dd;
    background: linear-gradient(140deg, rgba(130, 84, 28, 0.72), rgba(94, 52, 17, 0.72));
}

.chat-window {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding: 1.2rem 1.35rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    background:
        radial-gradient(circle at 82% 18%, rgba(53, 130, 231, 0.15), transparent 42%),
        radial-gradient(circle at 10% 72%, rgba(255, 150, 87, 0.14), transparent 40%);
}

.chat-window::-webkit-scrollbar {
    width: 10px;
}

.chat-window::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
}

.chat-window::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(78, 166, 255, 0.9), rgba(46, 216, 195, 0.9));
    border-radius: 999px;
}

.bubble {
    max-width: 85%;
    padding: 0.84rem 0.98rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: bubbleIn 240ms ease;
}

.bubble p {
    margin: 0;
    line-height: 1.52;
    white-space: pre-wrap;
}

.bubble time {
    display: block;
    margin-top: 0.42rem;
    font-size: 0.72rem;
    opacity: 0.76;
}

.bubble-bot {
    align-self: flex-start;
    background: var(--bot-bubble);
}

.bubble-user {
    align-self: flex-end;
    background: var(--user-bubble);
    color: #261308;
}

.composer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.62rem;
    padding: 1rem 1.15rem 1.2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
    background: linear-gradient(180deg, rgba(13, 24, 42, 0.65), rgba(11, 20, 36, 0.86));
}

.composer input {
    width: 100%;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(8, 17, 31, 0.8);
    color: var(--text-1);
    padding: 0.82rem 0.9rem;
    outline: none;
    font-size: 0.95rem;
}

.composer input:focus {
    border-color: var(--sky);
    box-shadow: 0 0 0 3px rgba(78, 166, 255, 0.25);
}

.composer button {
    border: 0;
    border-radius: 12px;
    padding: 0 1rem;
    background: linear-gradient(140deg, #ffbe60 0%, #ff8a5a 60%, #ff6c6c 100%);
    color: #231207;
    font-family: "Space Grotesk", sans-serif;
    font-weight: 700;
    cursor: pointer;
    transition: transform 150ms ease, filter 150ms ease;
}

.composer button:hover {
    transform: translateY(-1px);
    filter: saturate(1.12);
}

.composer button:active {
    transform: translateY(0);
}

@keyframes bubbleIn {
    from {
        transform: translateY(6px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(9px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
        opacity: 0.55;
    }
    50% {
        transform: scale(1.08);
        opacity: 0.4;
    }
}

@media (max-width: 980px) {
    body {
        overflow: auto;
    }

    .shell {
        grid-template-columns: 1fr;
        height: auto;
        min-height: 100vh;
        padding: 1rem;
    }

    .brand-panel {
        padding: 1.5rem;
    }

    .chat-panel {
        min-height: 70vh;
    }
}

@media (max-width: 600px) {
    .chips {
        grid-template-columns: 1fr;
    }

    .chat-header,
    .chat-window,
    .composer {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .bubble {
        max-width: 93%;
    }
}