:root {
    --bg-0: #020305;
    --bg-1: #05070c;
    --bg-2: #0a101a;
    --surface-1: rgba(8, 10, 14, 0.86);
    --surface-2: rgba(10, 12, 18, 0.92);
    --surface-3: rgba(14, 18, 28, 0.94);
    --line-soft: rgba(138, 180, 255, 0.22);
    --line-strong: rgba(114, 170, 255, 0.35);
    --text-0: #f4f8ff;
    --text-1: #d5e3ff;
    --text-2: #9eb8ea;
    --brand-1: #2f7fff;
    --brand-2: #5aa0ff;
    --brand-3: #7cb6ff;
    --ok: #3dd598;
    --warn: #ffcf5a;
    --danger: #ff6f85;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-soft: 0 14px 34px rgba(0, 0, 0, 0.32);
    --shadow-glow: 0 0 0 1px rgba(89, 146, 255, 0.14), 0 20px 50px rgba(18, 78, 182, 0.25);
}

* {
    box-sizing: border-box;
}

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

body {
    font-family: "Manrope", "Segoe UI", sans-serif;
    color: var(--text-1);
    background:
        radial-gradient(1200px 620px at 8% -8%, rgba(57, 117, 255, 0.18), transparent 58%),
        radial-gradient(900px 540px at 100% 0%, rgba(64, 140, 255, 0.14), transparent 52%),
        linear-gradient(170deg, var(--bg-0), var(--bg-1) 52%, var(--bg-2));
}

.background-layer {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(600px 340px at 12% 75%, rgba(48, 118, 255, 0.12), transparent 66%),
        radial-gradient(620px 300px at 88% 80%, rgba(94, 141, 255, 0.08), transparent 62%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--brand-3);
    text-decoration: none;
}

a:hover {
    color: #bfd8ff;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(14px);
    background: rgba(3, 4, 8, 0.78);
    border-bottom: 1px solid rgba(132, 176, 255, 0.16);
}

.header-inner {
    width: min(1160px, calc(100% - 2.5rem));
    margin: 0 auto;
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
}

.brand-pill {
    font-weight: 800;
    letter-spacing: 0.02em;
    font-size: 1.02rem;
    color: #eaf2ff;
    padding: 0.54rem 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(126, 181, 255, 0.35);
    background: linear-gradient(130deg, rgba(42, 95, 204, 0.44), rgba(24, 53, 119, 0.42));
}

nav {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

nav a {
    color: var(--text-1);
    font-weight: 700;
    font-size: 0.93rem;
    padding: 0.45rem 0.8rem;
    border-radius: 9px;
    transition: background 0.2s ease, color 0.2s ease;
}

nav a:hover {
    background: rgba(96, 154, 255, 0.18);
    color: #f4f9ff;
}

.container {
    position: relative;
    z-index: 1;
    width: min(1160px, calc(100% - 2.5rem));
    margin: 2rem auto 2.5rem;
    display: grid;
    gap: 1.25rem;
}

.flash-stack {
    display: grid;
    gap: 0.65rem;
}

.flash {
    border-radius: var(--radius-sm);
    border: 1px solid rgba(124, 168, 238, 0.26);
    background: rgba(12, 15, 24, 0.88);
    color: #d5e8ff;
    padding: 0.72rem 0.9rem;
    font-size: 0.93rem;
}

.flash.success {
    border-color: rgba(80, 221, 162, 0.45);
    color: #d7ffef;
}

.flash.danger,
.flash.error {
    border-color: rgba(255, 114, 140, 0.45);
    color: #ffdbe3;
}

.flash.warning {
    border-color: rgba(255, 210, 90, 0.45);
    color: #fff3cd;
}

.flash.info {
    border-color: rgba(124, 191, 255, 0.45);
    color: #dff1ff;
    background: rgba(10, 24, 44, 0.9);
}

.page-head {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 0.2rem;
}

.page-head h1 {
    margin: 0;
    color: var(--text-0);
    font-size: clamp(1.36rem, 2.4vw, 2rem);
    letter-spacing: -0.02em;
}

.page-head p {
    margin: 0;
    color: var(--text-2);
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.74rem;
    font-weight: 800;
    color: var(--brand-3);
}

.panel {
    background: linear-gradient(170deg, var(--surface-2), var(--surface-1));
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-lg);
    padding: 1.05rem 1.15rem;
    box-shadow: var(--shadow-soft);
}

.panel h2,
.panel h3,
.panel h4 {
    margin-top: 0;
    color: var(--text-0);
}

.panel.narrow {
    max-width: 560px;
    margin: 1.5rem auto;
    text-align: center;
}

.subtle {
    color: var(--text-2);
    font-size: 0.92rem;
}

.grid-two {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.smooth-run {
    border-color: var(--line-strong);
    box-shadow: var(--shadow-glow);
}

.smooth-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.flow-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.66rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.75rem;
    color: #d7e7ff;
    border: 1px solid rgba(127, 177, 255, 0.36);
    background: rgba(42, 86, 180, 0.42);
}

.smooth-form,
.form-stack,
.muted-form {
    display: grid;
    gap: 0.7rem;
}

.stack-panels {
    display: grid;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.field-block {
    display: grid;
    gap: 0.4rem;
}

label {
    font-size: 0.86rem;
    font-weight: 700;
    color: var(--text-1);
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid rgba(129, 173, 248, 0.3);
    border-radius: var(--radius-sm);
    background: rgba(7, 9, 14, 0.9);
    color: #f3f8ff;
    font: inherit;
    padding: 0.62rem 0.72rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

input::placeholder,
textarea::placeholder {
    color: rgba(181, 203, 242, 0.62);
}

input:focus,
textarea:focus,
select:focus {
    border-color: rgba(100, 166, 255, 0.76);
    box-shadow: 0 0 0 3px rgba(80, 143, 255, 0.2);
    background: rgba(10, 12, 18, 0.96);
}

input[type="file"] {
    padding: 0.52rem;
    background: rgba(7, 8, 12, 0.95);
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--brand-2);
}

textarea {
    resize: vertical;
    min-height: 108px;
    line-height: 1.44;
}

button,
.primary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    border: 1px solid rgba(128, 184, 255, 0.45);
    border-radius: 11px;
    background: linear-gradient(140deg, #2d73ec, #2963c8 58%, #2250a8);
    color: #eef6ff;
    font-weight: 800;
    font-size: 0.89rem;
    letter-spacing: 0.01em;
    padding: 0.62rem 0.95rem;
    cursor: pointer;
    transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}

button:hover,
.primary-link:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(44, 112, 236, 0.35);
    filter: brightness(1.03);
}

button:active,
.primary-link:active {
    transform: translateY(0);
}

.inline-link {
    color: var(--brand-3);
    font-weight: 700;
    font-size: 0.9rem;
}

.inline-link:hover {
    color: #d3e8ff;
}

.item-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.55rem;
}

.item-list li {
    padding: 0.66rem 0.78rem;
    border-radius: 12px;
    border: 1px solid rgba(124, 167, 244, 0.2);
    background: rgba(9, 11, 17, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
}

.item-list.compact li {
    padding-top: 0.56rem;
    padding-bottom: 0.56rem;
}

.stacked {
    align-items: flex-start;
}

.inline-actions {
    display: inline-flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.mono {
    font-family: "IBM Plex Mono", Consolas, monospace;
    font-size: 0.76rem;
    color: #c7ddff;
}

.question-list {
    margin: 0;
    padding-left: 1.25rem;
    display: grid;
    gap: 0.42rem;
}

.question-list li {
    color: #dce9ff;
    line-height: 1.35;
}

.check-item {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    padding: 0.58rem 0.62rem;
    border-radius: 11px;
    border: 1px solid rgba(122, 168, 247, 0.22);
    background: rgba(9, 10, 16, 0.88);
}

.check-item span {
    line-height: 1.28;
}

.checkbox-grid {
    display: grid;
    gap: 0.55rem;
}

.auth-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 1rem;
}

.hero-panel {
    min-height: 320px;
    display: grid;
    align-content: center;
    gap: 0.7rem;
    background:
        linear-gradient(162deg, rgba(17, 38, 81, 0.62), rgba(6, 10, 18, 0.92)),
        radial-gradient(600px 280px at 10% 15%, rgba(67, 127, 255, 0.2), transparent 70%);
}

.hero-panel h1 {
    margin: 0;
    font-size: clamp(1.35rem, 2.2vw, 2rem);
    letter-spacing: -0.02em;
    color: #f1f7ff;
}

.hero-panel p {
    margin: 0;
    line-height: 1.55;
}

.auth-panel {
    max-width: 430px;
    width: 100%;
    justify-self: end;
}

.chat-shell {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
}

.chat-sidebar {
    position: sticky;
    top: 92px;
    display: grid;
    gap: 1rem;
}

.sidebar-metrics {
    display: grid;
    gap: 0.55rem;
}

.sidebar-metrics article {
    border: 1px solid rgba(128, 173, 248, 0.24);
    border-radius: 12px;
    padding: 0.62rem 0.7rem;
    background: rgba(12, 24, 54, 0.82);
    display: grid;
    gap: 0.15rem;
}

.sidebar-metrics span {
    color: var(--text-2);
    font-size: 0.8rem;
}

.sidebar-metrics strong {
    font-size: 1.25rem;
    color: #f0f6ff;
}

.sidebar-actions {
    display: grid;
    gap: 0.52rem;
}

.navigator-block {
    display: grid;
    gap: 0.52rem;
}

.navigator-list {
    display: flex;
    gap: 0.42rem;
    flex-wrap: wrap;
    max-height: 240px;
    overflow: auto;
    padding-right: 0.12rem;
}

.navigator-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 52px;
    padding: 0.36rem 0.5rem;
    border-radius: 10px;
    border: 1px solid rgba(126, 172, 249, 0.28);
    background: rgba(10, 22, 48, 0.92);
    color: #dce9ff;
    font-size: 0.82rem;
    font-weight: 700;
}

.navigator-list a:hover {
    border-color: rgba(112, 170, 255, 0.55);
    background: rgba(24, 53, 111, 0.82);
}

.chat-thread {
    padding: 0;
    overflow: hidden;
}

.thread-head {
    padding: 1rem 1rem 0.25rem;
    border-bottom: 1px solid rgba(127, 171, 245, 0.18);
}

.thread-head h2 {
    margin-bottom: 0.35rem;
}

.thread-head p {
    margin: 0 0 0.8rem;
    color: var(--text-2);
}

.chat-form {
    display: grid;
    gap: 0.9rem;
    padding: 0.9rem;
}

.chat-turn {
    display: grid;
    gap: 0.65rem;
}

.bubble {
    border-radius: 16px;
    padding: 0.75rem 0.86rem;
    border: 1px solid rgba(130, 173, 245, 0.2);
}

.bubble-user {
    background: rgba(11, 13, 21, 0.88);
}

.bubble-assistant {
    background: rgba(8, 10, 16, 0.95);
    border-color: rgba(116, 169, 255, 0.26);
    display: grid;
    gap: 0.55rem;
}

.bubble-user p,
.bubble-assistant p {
    margin: 0;
    line-height: 1.48;
}

.bubble-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.role-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.18rem 0.52rem;
    border-radius: 999px;
    border: 1px solid rgba(126, 178, 255, 0.24);
    font-size: 0.72rem;
    font-weight: 800;
    color: #cbe1ff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.role-tag.assistant {
    border-color: rgba(108, 173, 255, 0.42);
    background: rgba(35, 82, 173, 0.35);
    color: #e4f0ff;
}

.confidence-pill {
    font-size: 0.74rem;
    font-weight: 800;
    border-radius: 999px;
    padding: 0.2rem 0.56rem;
    border: 1px solid transparent;
}

.confidence-pill.high {
    color: #d6ffe9;
    border-color: rgba(78, 215, 154, 0.45);
    background: rgba(32, 119, 88, 0.42);
}

.confidence-pill.medium {
    color: #fff6d9;
    border-color: rgba(255, 209, 93, 0.45);
    background: rgba(135, 106, 36, 0.35);
}

.confidence-pill.low {
    color: #ffdbe3;
    border-color: rgba(255, 120, 144, 0.42);
    background: rgba(139, 52, 76, 0.35);
}

.evidence-drawer {
    border: 1px solid rgba(129, 173, 246, 0.2);
    border-radius: 11px;
    background: rgba(8, 11, 18, 0.95);
    padding: 0.28rem 0.55rem;
}

.evidence-drawer summary {
    cursor: pointer;
    color: #d9e9ff;
    font-weight: 700;
    font-size: 0.85rem;
}

.evidence-list {
    list-style: none;
    padding: 0;
    margin: 0.55rem 0 0;
    display: grid;
    gap: 0.55rem;
}

.evidence-list li {
    border: 1px solid rgba(124, 168, 241, 0.2);
    border-radius: 10px;
    padding: 0.55rem;
    background: rgba(6, 9, 14, 0.92);
}

.evidence-list strong {
    color: #e6f1ff;
}

.evidence-list p {
    margin-top: 0.38rem;
    color: var(--text-2);
    font-size: 0.86rem;
}

.composer-actions {
    border-top: 1px solid rgba(127, 170, 247, 0.2);
    margin-top: 0.25rem;
    padding-top: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.embedded-assistant {
    margin: 0.85rem 0.9rem 1rem;
    border: 1px solid rgba(123, 168, 248, 0.22);
    border-radius: 14px;
    background: rgba(7, 9, 14, 0.92);
    overflow: hidden;
}

.embedded-assistant-head {
    padding: 0.8rem 0.9rem 0.5rem;
    border-bottom: 1px solid rgba(127, 170, 247, 0.15);
}

.embedded-assistant-head h3 {
    margin: 0 0 0.2rem;
}

.embedded-assistant-head p {
    margin: 0;
}

.embedded-assistant-thread {
    max-height: 310px;
    overflow: auto;
    padding: 0.75rem 0.8rem;
    display: grid;
    gap: 0.6rem;
}

.assistant-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 1rem;
    align-items: start;
}

.assistant-main {
    padding: 0;
    min-height: 72vh;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    overflow: hidden;
}

.assistant-head {
    padding: 0.95rem 1rem 0.78rem;
    border-bottom: 1px solid rgba(127, 171, 245, 0.18);
}

.assistant-head h2 {
    margin: 0 0 0.2rem;
}

.assistant-head p {
    margin: 0;
}

.assistant-thread {
    padding: 1rem;
    display: grid;
    gap: 0.85rem;
    overflow: auto;
    max-height: calc(72vh - 145px);
}

.assistant-turn {
    display: flex;
}

.assistant-prompt {
    justify-content: flex-end;
}

.assistant-response {
    justify-content: flex-start;
}

.assistant-bubble {
    width: min(820px, 100%);
    border-radius: 16px;
    border: 1px solid rgba(130, 173, 245, 0.22);
    background: rgba(8, 10, 16, 0.96);
    padding: 0.75rem 0.85rem;
    display: grid;
    gap: 0.55rem;
}

.assistant-prompt .assistant-bubble {
    background: rgba(13, 21, 41, 0.95);
    border-color: rgba(116, 169, 255, 0.32);
}

.assistant-bubble p {
    margin: 0;
    line-height: 1.5;
    white-space: pre-wrap;
}

.assistant-empty {
    border: 1px dashed rgba(124, 168, 241, 0.35);
    border-radius: 12px;
    padding: 1rem;
    color: var(--text-2);
    text-align: center;
}

.assistant-meta {
    display: flex;
    justify-content: flex-end;
}

.citation-block {
    border-top: 1px solid rgba(126, 167, 237, 0.18);
    padding-top: 0.45rem;
    color: #dfeeff;
    font-size: 0.86rem;
    display: grid;
    gap: 0.18rem;
}

.assistant-composer {
    border-top: 1px solid rgba(127, 170, 247, 0.2);
    background: rgba(6, 8, 13, 0.96);
    padding: 0.78rem 0.9rem 0.95rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.65rem;
}

.assistant-composer textarea {
    min-height: 56px;
    max-height: 160px;
}

.assistant-option {
    grid-column: 1 / -1;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-2);
}

.assistant-option input[type="checkbox"] {
    width: 15px;
    height: 15px;
}

.assistant-history {
    position: sticky;
    top: 92px;
    display: grid;
    gap: 0.7rem;
    max-height: 78vh;
    overflow: hidden;
}

.assistant-history-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
}

.assistant-history-head h3 {
    margin: 0;
}

.assistant-history-list {
    display: grid;
    gap: 0.5rem;
    overflow: auto;
    padding-right: 0.12rem;
}

.history-item {
    border: 1px solid rgba(124, 167, 244, 0.2);
    border-radius: 11px;
    background: rgba(9, 11, 17, 0.9);
    padding: 0.56rem 0.62rem;
    display: grid;
    gap: 0.18rem;
}

.history-item.active {
    border-color: rgba(112, 170, 255, 0.6);
    box-shadow: 0 0 0 1px rgba(112, 170, 255, 0.25) inset;
    background: rgba(14, 25, 50, 0.95);
}

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

    .chat-sidebar {
        position: static;
    }

    .assistant-shell {
        grid-template-columns: 1fr;
    }

    .assistant-history {
        position: static;
        max-height: none;
    }
}

@media (max-width: 900px) {
    .grid-two,
    .auth-grid {
        grid-template-columns: 1fr;
    }

    .auth-panel {
        justify-self: stretch;
        max-width: none;
    }
}

@media (max-width: 700px) {
    .container,
    .header-inner {
        width: calc(100% - 1.2rem);
    }

    .container {
        margin-top: 1.15rem;
    }

    .panel {
        padding: 0.86rem 0.82rem;
        border-radius: 14px;
    }

    .site-header {
        position: static;
    }

    nav {
        gap: 0.2rem;
    }

    nav a {
        padding: 0.34rem 0.56rem;
    }

    .thread-head,
    .chat-form {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .embedded-assistant {
        margin-left: 0.75rem;
        margin-right: 0.75rem;
    }

    .assistant-thread {
        padding-left: 0.72rem;
        padding-right: 0.72rem;
        max-height: none;
    }

    .assistant-composer {
        grid-template-columns: 1fr;
    }
}