:root {
    color-scheme: light;
    --color-bg: #f4f7f3;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-surface-soft: #edf5f1;
    --color-text: #172326;
    --color-muted: #607074;
    --color-border: #d7e0dc;
    --color-primary: #176b5b;
    --color-primary-strong: #0f4c40;
    --color-accent: #e0b13f;
    --color-danger: #b5482c;
    --color-success: #218653;
    --color-online: #20a85a;
    --color-warning: #d19b2a;
    --color-chat-bg: #eaf1ee;
    --color-bubble-own: #d9f0e8;
    --color-bubble-other: #ffffff;
    --color-bubble-admin: #fff5d8;
    --color-focus: rgba(23, 107, 91, 0.18);
    --shadow-soft: 0 10px 30px rgba(23, 35, 38, 0.08);
    --shadow-card: 0 3px 14px rgba(23, 35, 38, 0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-pill: 999px;

    --party-primary: var(--color-primary);
    --party-accent: var(--color-accent);
    --project-bg: var(--color-bg);
    --chat-bg: var(--color-chat-bg);
    --bubble-own: var(--color-bubble-own);
    --bubble-other: var(--color-bubble-other);
    --bubble-admin: var(--color-bubble-admin);
    --text-main: var(--color-text);
    --text-muted: var(--color-muted);
    --danger: var(--color-danger);
    --success: var(--color-success);
    --surface: var(--color-surface);
    --surface-soft: var(--color-surface-soft);
    --border: var(--color-border);
    --warning-bg: color-mix(in srgb, var(--color-warning) 18%, var(--color-surface));
    --warning-border: var(--color-warning);
    --danger-bg: color-mix(in srgb, var(--color-danger) 14%, var(--color-surface));
    --danger-text: var(--color-danger);
    --success-bg: color-mix(in srgb, var(--color-success) 14%, var(--color-surface));
    --success-text: var(--color-success);
    --bg: var(--color-bg);
    --text: var(--color-text);
    --muted: var(--color-muted);
    --panel: var(--color-surface);
    --accent: var(--color-primary);
    --accent-dark: var(--color-primary-strong);
}

html[data-theme="dark"] {
    color-scheme: dark;
    --color-bg: #101817;
    --color-surface: #172321;
    --color-surface-elevated: #1d2c29;
    --color-surface-soft: #21332f;
    --color-text: #edf6f2;
    --color-muted: #aebdb8;
    --color-border: #31423e;
    --color-primary: #4eb49a;
    --color-primary-strong: #80d5bd;
    --color-accent: #e4bd58;
    --color-danger: #f08b70;
    --color-success: #6ed49c;
    --color-online: #5dd68f;
    --color-warning: #e4bd58;
    --color-chat-bg: #101817;
    --color-bubble-own: #1f4b42;
    --color-bubble-other: #1a2725;
    --color-bubble-admin: #3b321d;
    --color-focus: rgba(78, 180, 154, 0.24);
    --shadow-soft: 0 14px 38px rgba(0, 0, 0, 0.34);
    --shadow-card: 0 8px 26px rgba(0, 0, 0, 0.26);
}

@media (prefers-color-scheme: dark) {
    html:not([data-theme]) {
        color-scheme: dark;
        --color-bg: #101817;
        --color-surface: #172321;
        --color-surface-elevated: #1d2c29;
        --color-surface-soft: #21332f;
        --color-text: #edf6f2;
        --color-muted: #aebdb8;
        --color-border: #31423e;
        --color-primary: #4eb49a;
        --color-primary-strong: #80d5bd;
        --color-accent: #e4bd58;
        --color-danger: #f08b70;
        --color-success: #6ed49c;
        --color-online: #5dd68f;
        --color-warning: #e4bd58;
        --color-chat-bg: #101817;
        --color-bubble-own: #1f4b42;
        --color-bubble-other: #1a2725;
        --color-bubble-admin: #3b321d;
        --color-focus: rgba(78, 180, 154, 0.24);
        --shadow-soft: 0 14px 38px rgba(0, 0, 0, 0.34);
        --shadow-card: 0 8px 26px rgba(0, 0, 0, 0.26);
    }
}

html {
    background: var(--color-bg);
}

body {
    background: var(--color-bg);
    color: var(--color-text);
}

img,
svg {
    max-width: 100%;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
    color: var(--color-text);
    cursor: pointer;
    font: inherit;
    line-height: 1;
}

.theme-toggle:hover,
.theme-toggle:focus {
    border-color: var(--color-primary);
    background: var(--color-surface-soft);
    outline: 3px solid var(--color-focus);
}

.theme-toggle-icon {
    display: none;
}

html[data-theme="light"] .theme-toggle-icon[data-theme-icon="moon"],
html[data-theme="dark"] .theme-toggle-icon[data-theme-icon="sun"] {
    display: inline-flex;
}

.theme-toggle-text {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.theme-switcher {
    display: inline-flex;
    align-items: center;
    min-width: 0;
}

.logo-dark {
    display: none !important;
}

html[data-theme="dark"] .logo-light {
    display: none !important;
}

html[data-theme="dark"] .logo-dark {
    display: block !important;
}

.icon {
    width: 1.18em;
    height: 1.18em;
    flex: 0 0 auto;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.icon-button .icon,
.send-button .icon,
.menu-toggle .icon {
    width: 22px;
    height: 22px;
}

.send-button .icon {
    width: 26px;
    height: 26px;
}

.menu-toggle .icon {
    width: 30px;
    height: 30px;
}

.toast-container {
    position: fixed;
    top: 86px;
    right: 18px;
    z-index: 1600;
    display: grid;
    gap: 10px;
    width: min(420px, calc(100vw - 28px));
    pointer-events: none;
}

.toast {
    position: relative;
    padding: 12px 14px 12px 16px;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: 14px;
    background: var(--color-surface-elevated);
    color: var(--color-text);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.16);
    font-weight: 700;
    line-height: 1.28;
    overflow-wrap: anywhere;
    pointer-events: auto;
    transition: opacity 0.28s ease, transform 0.28s ease;
}

.action-toast {
    isolation: isolate;
}

.action-toast::before {
    content: "";
    position: absolute;
    inset: 9px auto 9px 7px;
    width: 3px;
    border-radius: 999px;
    background: currentColor;
    opacity: 0.2;
}

.toast.success {
    border-left-color: var(--color-success);
    color: var(--color-success);
}

.toast.error {
    border-left-color: var(--color-danger);
    color: var(--color-danger);
}

.toast.warning {
    border-left-color: var(--color-warning);
    color: var(--color-warning);
}

.toast.info {
    border-left-color: var(--color-primary);
    color: var(--color-primary);
}

.toast-container.is-hiding .toast {
    opacity: 0;
    transform: translateY(-8px);
}

.action-confirm-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1450;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(0, 0, 0, 0.46);
    backdrop-filter: blur(4px);
}

.action-confirm-panel {
    display: grid;
    gap: 12px;
    width: min(100%, 420px);
    padding: 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-soft);
}

.action-confirm-panel h3,
.action-confirm-panel p {
    margin: 0;
}

.action-confirm-panel h3 {
    color: var(--color-primary);
    font-size: 22px;
    line-height: 1.2;
}

.action-confirm-panel p {
    color: var(--color-muted);
    font-size: 16px;
    line-height: 1.35;
}

.action-confirm-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 4px;
}

.action-confirm-cancel,
.action-confirm-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
    color: var(--color-text);
    cursor: pointer;
    font: inherit;
    font-size: 16px;
    font-weight: 700;
}

.action-confirm-submit {
    border-color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface-elevated));
    color: var(--color-primary);
}

.action-confirm-submit.danger {
    border-color: var(--color-danger);
    background: color-mix(in srgb, var(--color-danger) 12%, var(--color-surface-elevated));
    color: var(--color-danger);
}

.action-confirm-cancel:focus,
.action-confirm-submit:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

@media (max-width: 760px) {
    .toast-container {
        top: 72px;
        left: 12px;
        right: 12px;
        width: auto;
    }

    .toast {
        padding: 12px 14px;
        font-size: 16px;
    }

    .action-confirm-actions {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
    }
}