:root {
    --blue: #1267f4;
    --navy: #071b3a;
    --text: #445573;
    --bg: #f5f9ff;
    --line: #dce7f5;
    --icon: #eef5ff;
    --shadow: 0 8px 24px rgba(22, 71, 130, 0.07);
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: #fff;
    color: var(--navy);
    font-family: Inter, Arial, sans-serif;
}
button,
input,
textarea {
    font: inherit;
}
svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    height: 80px;
    padding: 0 max(36px, calc((100% - 1180px) / 2));
    display: flex;
    align-items: center;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    color: var(--navy);
    font-size: 27px;
    font-weight: 750;
    text-decoration: none;
}
.brand b {
    color: var(--blue);
}
.brand-logo {
    display: grid;
    place-items: center;
    width: 41px;
    height: 41px;
    border-radius: 7px;
    background: var(--blue);
    color: #fff;
    font-size: 25px;
    font-weight: 500;
    box-shadow: 0 5px 14px rgba(18, 103, 244, 0.22);
}
.site-header nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 42px;
}
.site-header nav a {
    color: var(--navy);
    font-size: 14px;
    text-decoration: none;
}
.theme-toggle,
.menu-toggle {
    display: grid;
    place-items: center;
    border: 0;
    background: none;
    color: var(--navy);
    cursor: pointer;
}
.theme-toggle svg {
    width: 23px;
}
.grammar-button {
    display: flex;
    align-items: center;
    gap: 9px !important;
    padding: 13px 18px;
    border-radius: 8px;
    background: var(--blue);
    color: #fff !important;
    box-shadow: 0 5px 14px rgba(18, 103, 244, 0.18);
}
.grammar-button svg {
    width: 18px;
}
.menu-toggle {
    display: none;
    margin-left: auto;
}
.menu-toggle svg {
    width: 25px;
}
.hero {
    position: relative;
    overflow: hidden;
    padding: 47px 20px 31px;
    text-align: center;
    background: radial-gradient(circle at 8% 0, #e9f1ff 0 10%, transparent 22%),
        radial-gradient(circle at 100% 85%, #edf4ff 0 13%, transparent 26%), linear-gradient(180deg, #f8fbff, #fff);
}
.hero h1 {
    margin: 0;
    font-size: 54px;
    line-height: 1.15;
    letter-spacing: -2px;
}
.hero p {
    margin: 13px 0 0;
    color: var(--text);
    font-size: 20px;
    line-height: 1.45;
}
.dots {
    position: absolute;
    width: 90px;
    height: 90px;
    opacity: 0.35;
    background-image: radial-gradient(#1267f4 1.3px, transparent 1.3px);
    background-size: 14px 14px;
}
.dots-a {
    top: 20px;
    left: 10px;
}
.dots-b {
    right: 10px;
    bottom: 2px;
}
.page-shell {
    width: min(1180px, calc(100% - 48px));
    margin: auto;
}
.top-stats,
.secondary-stats,
.keyword-card,
.benefits,
.utility-card {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    box-shadow: var(--shadow);
}
.top-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 0;
    padding: 27px 30px;
}
.stat {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 0 27px;
    border-right: 1px solid var(--line);
}
.stat:first-child {
    padding-left: 0;
}
.stat:last-child {
    padding-right: 0;
    border: 0;
}
.icon-box {
    display: grid;
    place-items: center;
    flex: 0 0 66px;
    height: 66px;
    border-radius: 14px;
    background: var(--icon);
    color: var(--blue);
}
.icon-box svg {
    width: 33px;
}
.stat p {
    margin: 0;
    font-size: 14px;
    font-weight: 650;
}
.stat strong {
    display: block;
    margin-top: 8px;
    color: var(--blue);
    font-size: 27px;
    white-space: nowrap;
}
.editor-layout {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 18px;
    margin-top: 26px;
}
.tool-rail {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    box-shadow: var(--shadow);
}
.tool-rail button {
    position: relative;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 6px;
    min-height: 79px;
    border: 0;
    background: #fff;
    color: var(--navy);
    font-size: 14px;
    cursor: pointer;
}
.tool-rail button.active,
.tool-rail button:hover {
    color: var(--blue);
    background: #f8fbff;
}
.tool-rail button.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 27px;
    width: 3px;
    height: 28px;
    border-radius: 0 3px 3px 0;
    background: var(--blue);
}
.tool-rail svg {
    width: 24px;
    height: 24px;
}
.editor-main {
    min-width: 0;
}
.textarea-card {
    position: relative;
    height: 460px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    box-shadow: var(--shadow);
}
textarea {
    width: 100%;
    height: 100%;
    padding: 27px 25px 47px;
    resize: none;
    border: 0;
    outline: 0;
    border-radius: inherit;
    background: transparent;
    color: var(--navy);
    font-size: 16px;
    line-height: 1.7;
}
textarea:focus {
    box-shadow: inset 0 0 0 2px rgba(18, 103, 244, 0.25);
}
textarea::placeholder {
    color: #667792;
}
.char-limit {
    position: absolute;
    right: 22px;
    bottom: 18px;
    color: #405375;
    font-size: 14px;
}
.char-limit b {
    font-weight: 500;
}
.action-bar {
    display: grid;
    grid-template-columns: 1.05fr 0.8fr 1.15fr 1.12fr 1.05fr 1.08fr;
    gap: 14px;
    margin-top: 24px;
}
.action-bar button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 58px;
    border: 1px solid #a9c8ff;
    border-radius: 8px;
    background: #fff;
    color: #064bbd;
    font-size: 14px;
    font-weight: 650;
    cursor: pointer;
}
.action-bar button.primary {
    border-color: var(--blue);
    background: var(--blue);
    color: #fff;
}
.action-bar svg {
    width: 21px;
}
.action-bar b {
    font-size: 16px;
    font-weight: 500;
}
.secondary-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 26px;
    padding: 28px 0;
}
.secondary-stats > div {
    display: grid;
    place-items: center;
    gap: 9px;
    border-right: 1px solid var(--line);
    text-align: center;
}
.secondary-stats > div:last-child {
    border: 0;
}
.secondary-stats svg {
    width: 28px;
    color: var(--blue);
}
.secondary-stats span {
    min-height: 32px;
    font-size: 14px;
    line-height: 1.35;
}
.secondary-stats strong {
    font-size: 16px;
}
.utility-card {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
    margin-top: 22px;
    padding: 22px 26px;
}
.goal-heading,
.goal-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.goal-heading {
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 650;
}
.goal-heading span,
.save-state {
    color: #7a8ba4;
    font-size: 14px;
}
.progress-track {
    height: 5px;
    flex: 1;
    overflow: hidden;
    border-radius: 5px;
    background: #e7effb;
}
.progress-track i {
    display: block;
    width: 0;
    height: 100%;
    background: var(--blue);
}
.goal-row input {
    width: 80px;
    height: 34px;
    border: 1px solid var(--line);
    border-radius: 7px;
    text-align: center;
}
.save-state {
    margin: 6px 0 0;
    text-align: right;
}
.save-state span {
    display: inline-block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--blue);
}
.platform-limits {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.limit-stat > span {
    color: #6b7c98;
    font-size: 14px;
    text-transform: uppercase;
}
.limit-stat strong {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 6px;
    font-size: 16px;
}
.limit-stat small {
    color: #7a8ba4;
    font-size: 14px;
}
.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--blue);
}
.limit-line {
    display: block;
    height: 2px;
    margin-top: 8px;
    background: #e7effb;
}
.limit-line i {
    display: block;
    width: 0;
    height: 100%;
    background: var(--blue);
}
.over b {
    color: #d5364c;
}
.keyword-card {
    margin-top: 22px;
    padding: 18px 24px 16px;
}
.keyword-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.keyword-head h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    font-size: 17px;
}
.keyword-head h2 svg {
    width: 25px;
    color: var(--blue);
}
.tabs {
    display: flex;
    gap: 10px;
}
.tabs button,
.view-more {
    height: 39px;
    padding: 0 19px;
    border: 1px solid #b8cff5;
    border-radius: 7px;
    background: #fff;
    color: var(--navy);
    font-size: 14px;
    cursor: pointer;
}
.tabs button[aria-selected="true"] {
    border-color: var(--blue);
    background: var(--blue);
    color: #fff;
}
.keyword-meta {
    display: flex;
    gap: 20px;
    margin: 10px 0 7px;
    color: #70809a;
    font-size: 14px;
}
.keyword-columns,
.keyword-row {
    display: grid;
    grid-template-columns: 1fr 130px 130px 170px;
    gap: 20px;
    align-items: center;
}
.keyword-columns {
    padding: 11px 13px;
    border: 1px solid var(--line);
    background: #f8fbff;
    color: #405272;
    font-size: 14px;
}
.keyword-row {
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-top: 0;
    font-size: 14px;
}
.keyword-row strong {
    font-weight: 650;
}
.keyword-row span {
    text-align: left !important;
    color: #344765;
}
.keyword-row::after {
    content: "";
    height: 3px;
    width: var(--density, 30%);
    background: var(--blue);
}
.empty-state {
    padding: 32px;
    text-align: center;
    color: #667792;
}
.empty-state small {
    display: block;
    margin-top: 6px;
}
.view-more {
    display: block;
    margin: 15px auto 0;
    color: #0754cc;
    font-weight: 600;
}
.benefits {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin: 24px 0;
    padding: 27px 28px;
    background: #f8fbff;
}
.benefits > div {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 0 26px;
    border-right: 1px solid var(--line);
}
.benefits > div:first-child {
    padding-left: 0;
}
.benefits > div:last-child {
    padding-right: 0;
    border: 0;
}
.benefits svg {
    width: 35px;
    flex: 0 0 auto;
    color: var(--blue);
}
.benefits p {
    margin: 0;
    color: var(--text);
    font-size: 14px;
    line-height: 1.7;
}
.benefits strong {
    display: block;
    color: #063e9f;
    font-size: 14px;
}
footer {
    width: min(1180px, calc(100% - 48px));
    margin: auto;
    padding: 0 0 31px;
    display: flex;
    justify-content: space-between;
    color: var(--text);
    font-size: 14px;
}
footer a {
    color: inherit;
    text-decoration: none;
}
footer p a {
    color: var(--blue);
}
footer nav {
    display: flex;
    gap: 42px;
}
.toast {
    position: fixed;
    z-index: 30;
    left: 50%;
    bottom: 25px;
    padding: 11px 18px;
    border-radius: 7px;
    background: var(--navy);
    color: #fff;
    font-size: 14px;
    opacity: 0;
    transform: translate(-50%, 15px);
    transition: 0.2s;
    pointer-events: none;
}
.toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}
.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;
}
:focus-visible {
    outline: 3px solid rgba(18, 103, 244, 0.3);
    outline-offset: 3px;
}
@media (max-width: 980px) {
    .site-header {
        padding: 0 24px;
    }
    .site-header nav {
        gap: 24px;
    }
    .page-shell {
        width: calc(100% - 32px);
    }
    .top-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 0;
    }
    .stat:nth-child(2) {
        border: 0;
    }
    .stat:nth-child(n + 3) {
        padding-top: 22px;
        border-top: 1px solid var(--line);
    }
    .editor-layout {
        grid-template-columns: 92px 1fr;
    }
    .action-bar {
        grid-template-columns: repeat(3, 1fr);
    }
    .secondary-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 22px 0;
    }
    .secondary-stats > div:nth-child(3) {
        border: 0;
    }
    .secondary-stats > div:nth-child(n + 4) {
        padding-top: 20px;
        border-top: 1px solid var(--line);
    }
    .keyword-columns,
    .keyword-row {
        grid-template-columns: 1fr 70px 90px 110px;
    }
    .benefits {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px 0;
    }
    .benefits > div:nth-child(2) {
        border: 0;
    }
}
@media (max-width: 700px) {
    .site-header {
        height: 68px;
    }
    .brand {
        font-size: 21px;
    }
    .brand-logo {
        width: 36px;
        height: 36px;
        font-size: 21px;
    }
    .menu-toggle {
        display: grid;
    }
    .site-header nav {
        position: absolute;
        top: 68px;
        right: 0;
        left: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px 20px 20px;
        background: #fff;
        border-bottom: 1px solid var(--line);
    }
    .site-header.open nav {
        display: flex;
    }
    .site-header nav > a:not(.grammar-button) {
        padding: 12px;
    }
    .theme-toggle {
        position: absolute;
        right: 70px;
        top: -48px;
    }
    .grammar-button {
        justify-content: center;
        margin-top: 8px;
    }
    .hero {
        padding: 34px 16px 25px;
    }
    .hero h1 {
        font-size: 38px;
    }
    .hero p {
        font-size: 16px;
    }
    .page-shell {
        width: calc(100% - 24px);
    }
    .top-stats {
        padding: 20px 16px;
    }
    .stat {
        gap: 12px;
        padding: 0 12px;
    }
    .stat:first-child {
        padding-left: 0;
    }
    .icon-box {
        flex-basis: 46px;
        height: 46px;
        border-radius: 10px;
    }
    .icon-box svg {
        width: 25px;
    }
    .stat strong {
        font-size: 21px;
    }
    .editor-layout {
        display: flex;
        flex-direction: column;
    }
    .tool-rail {
        flex-direction: row;
        overflow-x: auto;
    }
    .tool-rail button {
        flex: 0 0 75px;
        min-height: 68px;
    }
    .tool-rail button.active::before {
        top: auto;
        right: 22px;
        bottom: 0;
        left: 22px;
        width: auto;
        height: 3px;
    }
    .textarea-card {
        height: 390px;
    }
    .action-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .action-bar button {
        height: 50px;
    }
    .secondary-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .secondary-stats > div {
        padding: 12px;
        border-top: 1px solid var(--line) !important;
    }
    .secondary-stats > div:nth-child(2n) {
        border-right: 0;
    }
    .secondary-stats > div:last-child {
        grid-column: span 2;
    }
    .utility-card {
        grid-template-columns: 1fr;
        padding: 18px;
    }
    .platform-limits {
        gap: 10px;
    }
    .keyword-head {
        align-items: flex-start;
        flex-direction: column;
    }
    .tabs {
        width: 100%;
        overflow-x: auto;
    }
    .tabs button {
        flex: 1;
        min-width: max-content;
        padding-inline: 12px;
    }
    .keyword-columns,
    .keyword-row {
        grid-template-columns: minmax(110px, 1fr) 50px 75px;
    }
    .keyword-columns span:last-child,
    .keyword-row::after {
        display: none;
    }
    .keyword-card {
        padding: 16px 12px;
    }
    .benefits {
        grid-template-columns: 1fr;
        padding: 22px;
    }
    .benefits > div {
        padding: 18px 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }
    .benefits > div:last-child {
        border: 0;
    }
    footer {
        width: calc(100% - 32px);
        flex-direction: column;
        gap: 14px;
        text-align: center;
    }
    footer nav {
        justify-content: center;
        gap: 20px;
    }
}
@media (max-width: 430px) {
    .top-stats {
        gap: 18px 0;
    }
    .stat {
        display: block;
    }
    .icon-box {
        margin-bottom: 10px;
    }
    .stat p {
        font-size: 14px;
    }
    .stat strong {
        font-size: 19px;
    }
    .platform-limits {
        grid-template-columns: 1fr;
    }
    .hero p br {
        display: none;
    }
}
.theme-picker {
    position: relative;
}
.theme-menu {
    position: absolute;
    z-index: 30;
    top: calc(100% + 14px);
    right: -8px;
    display: none;
    width: 150px;
    padding: 7px;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: #fff;
    box-shadow: 0 12px 30px rgba(7, 27, 58, 0.15);
}
.theme-picker.open .theme-menu {
    display: block;
}
.theme-menu button {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    height: 40px;
    padding: 0 10px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--navy);
    font-size: 14px;
    cursor: pointer;
}
.theme-menu button:hover {
    background: var(--icon);
    color: var(--blue);
}
.theme-menu svg {
    width: 18px;
}
.theme-menu span {
    margin-left: auto;
    visibility: hidden;
    color: var(--blue);
}
.theme-menu button[aria-checked="true"] span {
    visibility: visible;
}
body.dark {
    --navy: #eef5ff;
    --text: #aebdd3;
    --line: #263a58;
    --icon: #172d4c;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    background: #081426;
    color: var(--navy);
}
body.dark .site-header,
body.dark .site-header nav,
body.dark .top-stats,
body.dark .tool-rail,
body.dark .tool-rail button,
body.dark .textarea-card,
body.dark .action-bar button:not(.primary),
body.dark .secondary-stats,
body.dark .utility-card,
body.dark .keyword-card,
body.dark .theme-menu {
    background: #0d1c31;
}
body.dark .hero {
    background: radial-gradient(circle at 8% 0, #122b50 0 10%, transparent 22%),
        radial-gradient(circle at 100% 85%, #10274a 0 13%, transparent 26%), linear-gradient(180deg, #0b1a30, #081426);
}
body.dark .tool-rail button.active,
body.dark .tool-rail button:hover,
body.dark .keyword-columns,
body.dark .benefits {
    background: #102440;
}
body.dark textarea,
body.dark .goal-row input {
    color: var(--navy);
    background: #0d1c31;
}
body.dark .keyword-row span,
body.dark .char-limit,
body.dark footer,
body.dark footer a {
    color: #aebdd3;
}
body.dark .theme-toggle,
body.dark .menu-toggle {
    color: #eef5ff;
}
@media (max-width: 700px) {
    .theme-picker {
        position: absolute;
        right: 68px;
        top: -49px;
    }
    .theme-toggle {
        position: static;
    }
    .theme-menu {
        top: 43px;
        right: -34px;
    }
    .site-header.open .theme-menu {
        display: none;
    }
    .site-header.open .theme-picker.open .theme-menu {
        display: block;
    }
}