:root {
    --bg-main: #0f1016;
    --bg-app: #14151d;
    --bg-panel: #181a23;
    --bg-panel-2: #1d202b;
    --bg-soft: #242837;
    --bg-soft-2: #2b3042;
    --line: rgba(255,255,255,.08);
    --line-strong: rgba(255,255,255,.14);

    --text-main: #f5f7fb;
    --text-soft: #a9afc3;
    --text-muted: #7f879d;

    --accent-1: #8b5cf6;
    --accent-2: #ec4899;
    --accent-3: #6d5cff;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --accent-gradient-soft: linear-gradient(135deg, rgba(139,92,246,.18) 0%, rgba(236,72,153,.18) 100%);

    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;

    --shadow-sm: 0 8px 24px rgba(0,0,0,.22);
    --shadow-md: 0 16px 40px rgba(0,0,0,.28);
    --shadow-lg: 0 24px 60px rgba(0,0,0,.34);

    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;

    --sidebar-width: 320px;
    --composer-height: 74px;
}


:root[data-theme="light"] {
    --bg-main: #f5f7fb;
    --bg-app: #ffffff;
    --bg-panel: #ffffff;
    --bg-panel-2: #f1f4fa;
    --bg-soft: #e9edf7;
    --bg-soft-2: #dfe5f2;
    --line: rgba(15,23,42,.12);
    --line-strong: rgba(15,23,42,.18);

    --text-main: #111827;
    --text-soft: #475569;
    --text-muted: #64748b;

    --accent-1: #7c3aed;
    --accent-2: #db2777;
    --accent-3: #4f46e5;
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
    --accent-gradient-soft: linear-gradient(135deg, rgba(124,58,237,.12) 0%, rgba(219,39,119,.10) 100%);

    --shadow-sm: 0 8px 24px rgba(15,23,42,.08);
    --shadow-md: 0 16px 40px rgba(15,23,42,.12);
    --shadow-lg: 0 24px 60px rgba(15,23,42,.16);
}

:root[data-theme="dark"] {
    color-scheme: dark;
}

:root[data-theme="light"] {
    color-scheme: light;
}

html,
body {
    height: 100%;
}

body {
    background:
        radial-gradient(circle at top left, rgba(139,92,246,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(236,72,153,.10), transparent 24%),
        linear-gradient(180deg, var(--bg-main) 0%, var(--bg-app) 100%);
    color: var(--text-main);
    font-family: Inter, Poppins, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: #dbe7ff;
}

a:hover {
    color: #fff;
}

.bg-light,
.bg-white {
    background-color: transparent !important;
}

.border,
.border-top,
.border-bottom,
.border-start,
.border-end {
    border-color: var(--line) !important;
}

.form-control,
.input-group-text,
.btn,
.modal-content,
.list-group-item,
.nav-tabs,
.nav-link,
.badge {
    box-shadow: none !important;
}

.form-control:focus,
.btn:focus,
.btn:active,
.nav-link:focus {
    box-shadow: 0 0 0 .2rem rgba(139,92,246,.18) !important;
}

::placeholder {
    color: var(--text-muted) !important;
}

.landing-topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 10, 14, 0.78);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.landing-topbar__inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 12px 0;
}

.landing-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
}

.landing-brand:hover {
    color: #fff;
    text-decoration: none;
}

.landing-brand__logo {
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    overflow: hidden;
}

.landing-brand__logo-img,
.landing-brand__logo img,
.landing-brand__logo svg {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.landing-brand__text strong {
    display: block;
    line-height: 1.1;
    font-size: 1rem;
    letter-spacing: .2px;
}

.landing-brand__text span {
    display: block;
    font-size: .72rem;
    color: var(--text-muted);
    line-height: 1.1;
    letter-spacing: .6px;
    text-transform: uppercase;
}

.landing-topbar__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.landing-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    color: #fff;
    font-size: .92rem;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,.08);
}

.landing-chip:hover {
    color: #fff;
    background: rgba(255,255,255,.12);
    text-decoration: none;
}

.social-link {
    font-weight: 600;
}

.section-subtitle {
    max-width: 860px;
    margin: 14px auto 0;
    color: rgba(255,255,255,.78);
}

.landing-footer {
    padding: 28px 0 40px;
    text-align: center;
    color: rgba(255,255,255,.72);
}

.landing-footer__links {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.landing-footer__links a {
    color: #dbe7ff;
    text-decoration: none;
}

.landing-footer__links a:hover {
    text-decoration: underline;
}

.input-group-text {
    background: rgba(255,255,255,.04) !important;
    color: var(--text-soft) !important;
    border: 1px solid rgba(255,255,255,.08) !important;
}

.form-control {
    background: rgba(255,255,255,.035) !important;
    color: var(--text-main) !important;
    border: 1px solid rgba(255,255,255,.08) !important;
    border-radius: 12px !important;
}

.form-control:hover {
    border-color: rgba(255,255,255,.12) !important;
}

.form-control:focus {
    background: rgba(255,255,255,.045) !important;
    border-color: rgba(139,92,246,.54) !important;
    color: var(--text-main) !important;
}

.form-check-input {
    background-color: rgba(255,255,255,.08);
    border-color: rgba(255,255,255,.14);
}

.form-check-input:checked {
    background-color: var(--accent-1);
    border-color: var(--accent-1);
}

.form-check-label {
    color: var(--text-main);
}

.btn {
    border-radius: 12px !important;
    transition: .18s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    color: #fff !important;
    background: var(--accent-gradient) !important;
    border: 0 !important;
    box-shadow: 0 12px 28px rgba(139,92,246,.26);
}

.btn-primary:hover {
    filter: brightness(1.04);
}

.btn-outline-secondary {
    color: var(--text-soft) !important;
    border-color: rgba(255,255,255,.10) !important;
    background: rgba(255,255,255,.03) !important;
}

.btn-outline-secondary:hover {
    color: #fff !important;
    border-color: rgba(255,255,255,.16) !important;
    background: rgba(255,255,255,.07) !important;
}

.btn-outline-light:hover,
.btn-outline-light:focus,
.btn-outline-light:active {
    color: #0b1020 !important;
    background: rgba(255,255,255,.96) !important;
    border-color: rgba(255,255,255,.96) !important;
}

.btn-light {
    color: var(--text-main) !important;
    background: rgba(255,255,255,.08) !important;
    border-color: rgba(255,255,255,.08) !important;
}

.btn-light:hover {
    background: rgba(255,255,255,.12) !important;
}

.modal-content {
    background:
        linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02)),
        rgba(23,24,33,.96) !important;
    color: var(--text-main);
    border: 1px solid rgba(255,255,255,.08) !important;
    border-radius: 18px !important;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(16px);
}

.modal-header,
.modal-footer {
    border-color: var(--line) !important;
}

.modal-title {
    color: #fff;
}

.btn-close {
    filter: invert(1) grayscale(100%);
    opacity: .72;
}

.btn-close:hover {
    opacity: 1;
}

.glow-soft {
    box-shadow: 0 0 0 1px rgba(255,255,255,.04), 0 0 24px rgba(139,92,246,.16);
}

.text-soft {
    color: var(--text-soft) !important;
}

.text-muted-soft {
    color: var(--text-muted) !important;
}
.landing-footer__links a.is-active,
.landing-footer__links a[aria-current="page"] {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

@media (max-width: 767.98px) {
    .landing-topbar__inner {
        align-items: flex-start;
    }

    .landing-topbar__meta {
        width: 100%;
    }
}


:root[data-theme="light"] body {
    background:
        radial-gradient(circle at top left, rgba(124,58,237,.10), transparent 30%),
        radial-gradient(circle at top right, rgba(219,39,119,.08), transparent 26%),
        linear-gradient(180deg, #f5f7fb 0%, #eef2f8 100%);
}

:root[data-theme="light"] .landing-topbar {
    background: rgba(255,255,255,.82);
    border-bottom-color: rgba(15,23,42,.10);
}

:root[data-theme="light"] .landing-brand,
:root[data-theme="light"] .landing-brand:hover,
:root[data-theme="light"] .landing-chip,
:root[data-theme="light"] .landing-chip:hover {
    color: var(--text-main);
}

:root[data-theme="light"] a {
    color: #4f46e5;
}

/* i18n language switcher in public header */
.landing-language-switch {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 4px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.08);
    flex: 0 0 auto;
}

.landing-language-switch__btn {
    border: 0;
    background: transparent;
    color: rgba(255,255,255,.72);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: .78rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: .04em;
    cursor: pointer;
    transition: background-color .16s ease, color .16s ease;
}

.landing-language-switch__btn:hover,
.landing-language-switch__btn.is-active {
    background: rgba(255,255,255,.18);
    color: #fff;
}

:root[data-theme="light"] .landing-language-switch {
    background: rgba(15,23,42,.06);
    border-color: rgba(15,23,42,.10);
}

:root[data-theme="light"] .landing-language-switch__btn {
    color: rgba(15,23,42,.62);
}

:root[data-theme="light"] .landing-language-switch__btn:hover,
:root[data-theme="light"] .landing-language-switch__btn.is-active {
    background: rgba(15,23,42,.10);
    color: var(--text-main);
}