@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Sora:wght@500;600;700&display=swap");

:root {
    --ink: #162141;
    --muted: #5c6684;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-border: rgba(255, 255, 255, 0.78);
    --brand: #1968ff;
    --brand-deep: #0f46c0;
    --accent: #ff7d4a;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Manrope", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1080px 460px at -12% -16%, rgba(25, 104, 255, 0.18), transparent 62%),
        radial-gradient(860px 460px at 112% -20%, rgba(255, 125, 74, 0.18), transparent 58%),
        linear-gradient(135deg, #f7fbff 0%, #eef2ff 52%, #ecf7ff 100%);
}

.main-page {
    max-width: 1140px;
    margin: 0 auto;
    padding: 28px 20px 34px;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 22px;
    padding: 16px 18px;
    box-shadow: 0 20px 56px rgba(20, 38, 82, 0.12);
    backdrop-filter: blur(8px);
    animation: card-enter 0.45s ease;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-name {
    font-family: "Sora", sans-serif;
    font-size: 1.26rem;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.main-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.main-nav-link,
.logout-button {
    border: 0;
    text-decoration: none;
    font-family: "Sora", sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #1d4dad;
    background: #ebf1ff;
    border-radius: 999px;
    padding: 8px 12px;
    transition: transform 0.18s ease, filter 0.18s ease, background 0.18s ease;
}

.main-nav-link:hover,
.logout-button:hover {
    transform: translateY(-1px);
    filter: saturate(1.05);
    background: #dfe9ff;
}

.main-nav-link.is-active {
    color: #fff;
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
    box-shadow: 0 10px 24px rgba(25, 104, 255, 0.28);
}

.logout-form {
    margin: 0;
}

.logout-button {
    cursor: pointer;
}

.hero,
.placeholder-panel {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 22px;
    box-shadow: 0 20px 56px rgba(20, 38, 82, 0.12);
    backdrop-filter: blur(8px);
    overflow: hidden;
}

.hero {
    margin-top: 16px;
    padding: 30px 24px;
    animation: card-enter 0.55s ease;
}

.hero::after {
    content: "";
    position: absolute;
    width: 340px;
    height: 340px;
    right: -120px;
    top: -160px;
    background: radial-gradient(circle at center, rgba(25, 104, 255, 0.2), transparent 70%);
    pointer-events: none;
}

.hero h1 {
    margin: 0 0 10px;
    max-width: 720px;
    font-family: "Sora", sans-serif;
    font-size: clamp(1.7rem, 4vw, 2.35rem);
    line-height: 1.12;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    margin: 0;
    max-width: 760px;
    color: var(--muted);
    line-height: 1.55;
    font-size: 1rem;
}

.user-note {
    margin-top: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 12px;
    background: #eef4ff;
    border: 1px solid #d8e4fb;
    font-size: 0.92rem;
}

.placeholder-panel {
    margin-top: 16px;
    padding: 22px 24px;
    animation: card-enter 0.65s ease;
}

.placeholder-panel h2 {
    margin: 0 0 10px;
    font-family: "Sora", sans-serif;
    font-size: 1.28rem;
    letter-spacing: -0.015em;
}

.placeholder-list {
    margin: 0;
    padding-left: 20px;
    color: #1d2a49;
}

.placeholder-list a {
    color: #1a56d8;
    font-weight: 700;
    text-decoration: none;
}

.placeholder-list a:hover {
    text-decoration: underline;
}

.placeholder-list li {
    margin: 6px 0;
}

@keyframes card-enter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .main-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero,
    .placeholder-panel {
        border-radius: 16px;
        padding: 20px 18px;
    }
}