:root {
    --bg: #04131a;
    --bg-deep: #02070f;
    --panel: rgba(7, 19, 30, 0.82);
    --panel-strong: rgba(7, 19, 30, 0.96);
    --line: rgba(116, 214, 255, 0.16);
    --text: #e8f5fb;
    --muted: #97b4c6;
    --aqua: #57d3ff;
    --cyan: #13b6d8;
    --green: #40d994;
    --gold: #f4cf74;
    --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    background:
        radial-gradient(circle at top left, rgba(87, 211, 255, 0.16), transparent 34%),
        radial-gradient(circle at bottom right, rgba(19, 182, 216, 0.1), transparent 30%),
        linear-gradient(160deg, var(--bg) 0%, var(--bg-deep) 100%);
    color: var(--text);
    font-family: "IBM Plex Sans", sans-serif;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(87, 211, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(87, 211, 255, 0.04) 1px, transparent 1px);
    background-size: 34px 34px;
    mask-image: radial-gradient(circle at center, black 38%, transparent 100%);
}

.page-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(280px, 460px) minmax(380px, 1fr);
    gap: 28px;
    padding: 28px;
    min-height: 100vh;
}

.intro-panel,
.workspace-panel {
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--panel);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.intro-panel {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.intro-topline,
.workspace-kicker,
.summary-kicker,
.signal-label {
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.73rem;
    font-weight: 700;
    color: var(--aqua);
}

.intro-panel h1,
.workspace-header h2,
.summary-header h3 {
    margin: 0;
    font-family: "Space Grotesk", sans-serif;
    line-height: 1.02;
}

.intro-panel h1 {
    font-size: clamp(2.4rem, 4vw, 4.6rem);
}

.intro-copy,
.scope-card p,
.summary-note,
.upload-note {
    color: var(--muted);
    line-height: 1.65;
}

.signal-card,
.scope-card,
.chat-card,
.summary-card {
    border: 1px solid var(--line);
    border-radius: 24px;
    background: var(--panel-strong);
}

.signal-card {
    padding: 20px 22px;
}

.signal-list {
    margin: 14px 0 0;
    padding-left: 18px;
    color: var(--text);
    line-height: 1.7;
}

.scope-grid {
    display: grid;
    gap: 16px;
}

.scope-card {
    padding: 18px 20px;
}

.scope-title {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gold);
}

.workspace-panel {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.workspace-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.health-pill {
    border-radius: 999px;
    padding: 10px 14px;
    background: rgba(87, 211, 255, 0.08);
    border: 1px solid rgba(87, 211, 255, 0.2);
    color: var(--muted);
    white-space: nowrap;
}

.health-pill.is-ok {
    color: #c5ffe3;
    border-color: rgba(64, 217, 148, 0.35);
    background: rgba(64, 217, 148, 0.1);
}

.workspace-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 20px;
    min-height: 0;
    flex: 1;
}

.chat-card {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 72vh;
}

.messages {
    flex: 1;
    min-height: 260px;
    max-height: 68vh;
    overflow: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-right: 4px;
}

.message {
    max-width: 86%;
    padding: 14px 16px;
    border-radius: 18px;
    white-space: pre-wrap;
    line-height: 1.58;
}

.message.assistant {
    background: rgba(16, 31, 45, 0.94);
    border: 1px solid rgba(87, 211, 255, 0.14);
}

.message.user {
    align-self: flex-end;
    background: linear-gradient(135deg, rgba(36, 110, 214, 0.96), rgba(19, 182, 216, 0.82));
}

.message.status {
    background: rgba(244, 207, 116, 0.1);
    border: 1px solid rgba(244, 207, 116, 0.2);
    color: #f8e2a4;
}

.starter-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.prompt-chip,
.ghost-button,
.primary-button {
    border: 0;
    cursor: pointer;
    font: inherit;
}

.prompt-chip {
    border-radius: 999px;
    padding: 10px 14px;
    color: var(--text);
    background: rgba(87, 211, 255, 0.08);
    border: 1px solid rgba(87, 211, 255, 0.18);
}

.composer {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.message-input {
    width: 100%;
    min-height: 112px;
    border: 1px solid rgba(87, 211, 255, 0.16);
    border-radius: 20px;
    background: rgba(3, 10, 16, 0.9);
    color: var(--text);
    padding: 16px;
    resize: vertical;
    font: inherit;
}

.message-input::placeholder {
    color: #6d8ca0;
}

.composer-actions {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
}

.upload-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.ghost-button,
.primary-button {
    padding: 12px 18px;
    border-radius: 999px;
}

.ghost-button {
    background: rgba(87, 211, 255, 0.09);
    color: var(--text);
    border: 1px solid rgba(87, 211, 255, 0.2);
}

.primary-button {
    background: linear-gradient(135deg, #1e78ff, #13b6d8);
    color: white;
    font-weight: 700;
    box-shadow: 0 18px 36px rgba(30, 120, 255, 0.22);
}

.summary-card {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.summary-list {
    margin: 0;
    display: grid;
    gap: 14px;
}

.summary-list div {
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(87, 211, 255, 0.12);
}

.summary-list dt {
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.88rem;
}

.summary-list dd {
    margin: 0;
    line-height: 1.55;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

@media (max-width: 1100px) {
    .page-shell {
        grid-template-columns: 1fr;
    }

    .workspace-layout {
        grid-template-columns: 1fr;
    }

    .chat-card {
        min-height: auto;
    }

    .messages {
        max-height: 52vh;
    }
}

@media (max-width: 720px) {
    .page-shell {
        padding: 16px;
    }

    .intro-panel,
    .workspace-panel,
    .chat-card,
    .summary-card {
        border-radius: 22px;
    }

    .intro-panel {
        padding: 22px;
    }

    .workspace-panel {
        padding: 16px;
    }

    .composer-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .upload-wrap {
        justify-content: space-between;
    }

    .ghost-button,
    .primary-button {
        width: 100%;
        text-align: center;
    }
}