:root {
    --color-bg: #fbfaff;
    --color-surface: #ffffff;
    --color-text: #111d3f;
    --color-muted: #66708a;
    --color-border: #e7e5ef;
    --color-primary: #7561e7;
    --color-primary-dark: #5f4fd0;
    --color-primary-soft: #efecff;
    --shadow-card: 0 24px 70px rgba(31, 30, 71, 0.10);
    --radius-xl: 28px;
    --radius-lg: 18px;
    --radius-md: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--color-text);
    background:
        radial-gradient(circle at 18% 18%, rgba(117, 97, 231, 0.12), transparent 32%),
        radial-gradient(circle at 82% 8%, rgba(255, 190, 203, 0.18), transparent 26%),
        linear-gradient(135deg, #ffffff 0%, var(--color-bg) 100%);
}

button, input { font: inherit; }
a { color: inherit; text-decoration: none; }

.page-shell {
    width: min(1380px, calc(100% - 64px));
    min-height: 100vh;
    margin: 0 auto;
    display: grid;
    grid-template-rows: auto 1fr auto auto;
    gap: 44px;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 42px 0 26px;
}

.brand {
    display: inline-flex;
    align-items: baseline;
    font-size: clamp(2rem, 4vw, 3.1rem);
    font-weight: 800;
    letter-spacing: -0.06em;
}

.brand-main { color: #11204a; }
.brand-dot { color: #ff9cad; margin-left: 2px; }
.brand-accent { color: var(--color-primary); margin-left: 4px; }

.main-nav {
    display: flex;
    align-items: center;
    gap: 42px;
    font-size: 1.05rem;
    color: #141a2b;
}

.main-nav a { transition: color 160ms ease; }
.main-nav a:hover { color: var(--color-primary); }

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(420px, 520px);
    gap: clamp(48px, 7vw, 120px);
    align-items: center;
}

.hero-copy { max-width: 690px; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    border-radius: 999px;
    color: var(--color-primary-dark);
    background: var(--color-primary-soft);
    font-weight: 600;
}

h1 {
    margin: 34px 0 22px;
    font-size: clamp(3rem, 6vw, 5.35rem);
    line-height: 1.08;
    letter-spacing: -0.07em;
}

h1 span {
    color: var(--color-primary);
}

.lead {
    max-width: 610px;
    margin: 0;
    color: var(--color-muted);
    font-size: clamp(1.16rem, 2vw, 1.55rem);
    line-height: 1.55;
}

.feature-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 58px;
}

.feature-card {
    text-align: center;
    color: #3e4865;
}

.feature-icon {
    width: 74px;
    height: 74px;
    margin: 0 auto 16px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(117, 97, 231, 0.10);
    color: var(--color-primary);
    font-size: 2rem;
    font-weight: 700;
}

.feature-card p {
    margin: 0;
    line-height: 1.38;
}

.auth-card {
    padding: 42px 40px 34px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(20px);
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-bottom: 34px;
    border-bottom: 1px solid var(--color-border);
}

.auth-tab {
    padding: 10px 12px 22px;
    border: 0;
    border-bottom: 3px solid transparent;
    background: transparent;
    color: #777f99;
    cursor: pointer;
    font-size: 1.14rem;
    font-weight: 700;
}

.auth-tab.is-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.auth-form {
    display: none;
}

.auth-form.is-active {
    display: block;
}

.auth-form label {
    display: block;
    margin: 0 0 10px;
    color: #34405b;
    font-weight: 500;
}

.input-wrap {
    position: relative;
    margin-bottom: 28px;
}

.input-wrap input {
    width: 100%;
    min-height: 66px;
    padding: 0 56px 0 18px;
    border: 1px solid #dfe1ea;
    border-radius: var(--radius-md);
    background: #fff;
    color: var(--color-text);
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.input-wrap input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(117, 97, 231, 0.12);
}

.input-wrap span {
    position: absolute;
    top: 50%;
    right: 18px;
    transform: translateY(-50%);
    color: #81889c;
}

.forgot-link {
    display: block;
    margin: -12px 0 26px;
    text-align: right;
    color: var(--color-primary);
    font-weight: 600;
}

.primary-button,
.secondary-button {
    width: 100%;
    min-height: 66px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 700;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.primary-button {
    border: 0;
    color: #fff;
    background: linear-gradient(135deg, #806cf0, #6353dd);
    box-shadow: 0 16px 28px rgba(99, 83, 221, 0.24);
}

.secondary-button {
    border: 1px solid #dfe1ea;
    color: #1b2234;
    background: #fff;
}

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

.divider {
    display: flex;
    align-items: center;
    gap: 18px;
    margin: 34px 0 28px;
    color: #81889c;
}

.divider::before,
.divider::after {
    content: "";
    height: 1px;
    flex: 1;
    background: var(--color-border);
}

.google-mark {
    margin-right: 14px;
    color: #4285f4;
    font-weight: 800;
}

.switch-hint,
.form-note {
    margin: 26px 0 0;
    text-align: center;
    color: #737b95;
}

.switch-hint button {
    border: 0;
    padding: 0;
    background: transparent;
    color: var(--color-primary);
    cursor: pointer;
    font-weight: 700;
}

.form-note {
    font-size: 0.92rem;
    line-height: 1.45;
}

.info-section {
    width: min(900px, 100%);
    margin: 0 auto;
    padding: 30px 34px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.58);
    text-align: center;
}

.info-section h2 {
    margin: 0 0 10px;
    font-size: 1.45rem;
}

.info-section p {
    margin: 0;
    color: var(--color-muted);
    line-height: 1.55;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 12px 0 42px;
    color: #747d95;
}

.footer-links {
    display: flex;
    gap: 34px;
}

.footer-links a:hover { color: var(--color-primary); }

@media (max-width: 980px) {
    .page-shell { width: min(100% - 32px, 760px); }
    .site-header,
    .site-footer {
        align-items: flex-start;
        flex-direction: column;
    }
    .main-nav { gap: 22px; flex-wrap: wrap; }
    .hero-layout { grid-template-columns: 1fr; }
    .feature-row { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
    .auth-card { padding: 28px 20px; }
    .main-nav { font-size: 0.95rem; }
    .feature-row { margin-top: 36px; }
    h1 { font-size: 2.8rem; }
}