:root {
    --font-sans: "Inter", "Segoe UI", sans-serif;
    --bg-canvas: #ececec;
    --bg-canvas-strong: #f7f7f7;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-solid: #ffffff;
    --surface-subtle: #f7f7f7;
    --surface-list: #e9ebf0;
    --surface-contrast: #3c317d;
    --text-strong: #3c317d;
    --text-body: #3c317d;
    --text-muted: #746a9c;
    --line-soft: rgba(92, 73, 170, 0.16);
    --line-strong: rgba(92, 73, 170, 0.28);
    --brand-gradient-start: #9d4fa5;
    --brand-gradient-end: #3d46a6;
    --brand: #5c49aa;
    --brand-strong: #6a4aa3;
    --brand-soft: rgba(106, 74, 163, 0.14);
    --accent: #b14ea5;
    --accent-soft: rgba(177, 78, 165, 0.16);
    --action-blue: #4c49ab;
    --success: #4c49ab;
    --success-soft: rgba(76, 73, 171, 0.14);
    --warning: #b14ea5;
    --warning-soft: rgba(177, 78, 165, 0.14);
    --danger: #dc2626;
    --danger-soft: rgba(220, 38, 38, 0.1);
    --shadow-lg: 0 34px 64px -34px rgba(60, 49, 125, 0.3);
    --shadow-md: 0 24px 44px -28px rgba(60, 49, 125, 0.22);
    --radius-3xl: 32px;
    --radius-2xl: 24px;
    --radius-xl: 20px;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-pill: 999px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    color-scheme: light;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    color: var(--text-strong);
    background:
        radial-gradient(circle at top left, rgba(157, 79, 165, 0.22), transparent 30%),
        radial-gradient(circle at bottom right, rgba(61, 70, 166, 0.18), transparent 24%),
        linear-gradient(135deg, var(--bg-canvas) 0%, #f2edf5 48%, var(--bg-canvas-strong) 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.42) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.42) 1px, transparent 1px);
    background-size: 38px 38px;
    mask-image: radial-gradient(circle at center, black, transparent 88%);
    opacity: 0.55;
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

a {
    color: inherit;
}

.panel {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(247, 247, 247, 0.94));
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
}

.surface-card {
    background: var(--surface-solid);
    border: 1px solid rgba(92, 73, 170, 0.12);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 8px 12px;
    border-radius: var(--radius-pill);
    background: rgba(92, 73, 170, 0.08);
    color: var(--text-body);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.eyebrow--brand {
    background: linear-gradient(135deg, rgba(157, 79, 165, 0.14), rgba(61, 70, 166, 0.14));
    color: var(--brand-strong);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: linear-gradient(145deg, rgba(157, 79, 165, 0.16), rgba(61, 70, 166, 0.16));
    color: var(--brand);
}

.brand-mark img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.brand-mark--large {
    width: 76px;
    height: 76px;
    border-radius: 22px;
}

.brand-lockup {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: min(176px, 100%);
    padding: 12px 18px;
    border-radius: 22px;
    border: 1px solid rgba(92, 73, 170, 0.14);
    background: linear-gradient(135deg, rgba(157, 79, 165, 0.14), rgba(61, 70, 166, 0.12));
    box-shadow: var(--shadow-md);
}

.brand-lockup img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.brand-lockup--compact {
    width: 136px;
    padding: 10px 14px;
    border-radius: 18px;
}

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

.hero-copy h1,
.hero-copy h2,
.hero-copy p,
.feature-card p,
.feature-card strong,
.feature-card span,
.field-hint,
.detail-card__header p,
.detail-card__header h3 {
    margin: 0;
}

.hero-copy h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.04;
    letter-spacing: -0.04em;
}

.hero-copy p {
    max-width: 62ch;
    color: var(--text-body);
    font-size: 1rem;
    line-height: 1.7;
}

.hero-cards {
    display: grid;
    gap: 16px;
}

.feature-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
}

.feature-card__label {
    color: var(--brand-strong);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.feature-card strong {
    font-size: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.65;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-body);
}

.field-hint {
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.5;
}

.input-control,
.textarea-control {
    width: 100%;
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    background: var(--surface-subtle);
    color: var(--text-strong);
    padding: 15px 16px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.input-control:focus,
.textarea-control:focus {
    outline: none;
    background: var(--surface-solid);
    border-color: rgba(106, 74, 163, 0.46);
    box-shadow: 0 0 0 4px rgba(106, 74, 163, 0.14);
}

.input-control::placeholder,
.textarea-control::placeholder {
    color: #8d86b1;
}

.textarea-control {
    min-height: 54px;
    max-height: 180px;
    resize: none;
}

.button-primary,
.button-secondary {
    border: none;
    border-radius: 18px;
    font-weight: 700;
    transition: transform 0.16s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.button-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--action-blue) 100%);
    color: #ffffff;
    box-shadow: 0 20px 28px -18px rgba(92, 73, 170, 0.5);
}

.button-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 24px 30px -18px rgba(92, 73, 170, 0.56);
}

.button-primary:active,
.button-secondary:active {
    transform: translateY(1px);
}

.button-primary:disabled,
.button-secondary:disabled {
    opacity: 0.62;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.button-primary--large {
    min-height: 56px;
    padding: 0 22px;
}

.button-secondary {
    padding: 13px 18px;
    background: rgba(92, 73, 170, 0.08);
    color: var(--brand-strong);
}

.button-secondary:hover {
    background: rgba(92, 73, 170, 0.14);
}

.button-danger {
    background: var(--danger-soft);
    color: #991b1b;
}

.button-danger:hover {
    background: rgba(220, 38, 38, 0.16);
}

.button-icon {
    min-width: 112px;
    min-height: 54px;
    padding: 0 20px;
}

.notice {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid transparent;
    line-height: 1.55;
    font-size: 14px;
}

.notice[data-tone="neutral"] {
    background: linear-gradient(135deg, rgba(157, 79, 165, 0.1), rgba(61, 70, 166, 0.1));
    border-color: rgba(92, 73, 170, 0.16);
    color: var(--brand-strong);
}

.notice[data-tone="success"] {
    background: var(--success-soft);
    border-color: rgba(76, 73, 171, 0.2);
    color: var(--action-blue);
}

.notice[data-tone="error"] {
    background: var(--danger-soft);
    border-color: rgba(220, 38, 38, 0.2);
    color: #991b1b;
}

.notice[data-tone="warning"] {
    background: var(--warning-soft);
    border-color: rgba(177, 78, 165, 0.18);
    color: var(--accent);
}

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

.message {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: min(76%, 560px);
    padding: 14px 16px;
    border-radius: 22px;
    box-shadow: 0 14px 24px -20px rgba(15, 23, 42, 0.32);
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
}

.message--incoming {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(92, 73, 170, 0.12);
}

.message--outgoing {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--accent) 0%, var(--action-blue) 100%);
    color: #ffffff;
}

.message__meta {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 12px;
    font-weight: 700;
}

.message--incoming .message__meta {
    color: var(--text-body);
}

.message--outgoing .message__meta {
    color: rgba(255, 255, 255, 0.86);
}

.event-note {
    align-self: center;
    max-width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-pill);
    background: rgba(92, 73, 170, 0.08);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    text-align: center;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 10px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.tag--brand {
    background: var(--brand-soft);
    color: var(--brand-strong);
}

.tag--success {
    background: var(--success-soft);
    color: var(--action-blue);
}

.tag--neutral {
    background: rgba(92, 73, 170, 0.08);
    color: var(--text-body);
}

.tag--warning {
    background: var(--warning-soft);
    color: var(--accent);
}

.toast-stack {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: min(360px, calc(100vw - 32px));
}

.toast {
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid rgba(92, 73, 170, 0.18);
    background: linear-gradient(135deg, var(--brand-gradient-start), var(--brand-gradient-end));
    color: #ffffff;
    box-shadow: 0 24px 44px -28px rgba(60, 49, 125, 0.42);
    line-height: 1.55;
}

.toast[data-tone="success"] {
    background: var(--action-blue);
}

.toast[data-tone="error"] {
    background: rgba(153, 27, 27, 0.96);
}

.toast[data-tone="warning"] {
    background: var(--accent);
}

.is-hidden {
    display: none !important;
}

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

.detail-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding-bottom: 12px;
    border-bottom: 1px dashed rgba(148, 163, 184, 0.28);
}

.detail-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.detail-label {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.detail-value {
    color: var(--text-strong);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.55;
    word-break: break-word;
}

@media (max-width: 960px) {
    .panel {
        border-radius: var(--radius-2xl);
    }

    .hero-copy h1 {
        font-size: clamp(1.85rem, 7vw, 2.8rem);
    }
}

@media (max-width: 640px) {
    body::before {
        opacity: 0.4;
    }

    .toast-stack {
        right: 12px;
        left: 12px;
        width: auto;
        bottom: 12px;
    }

    .message {
        max-width: 88%;
    }
}