/* 1. _______________ HEADER _______________ */

/* Sticky, glass-blurred header that breaks out of the container to span
   the full viewport width. Padding restores the container alignment for
   the inner content. */
header.header{
    position: sticky;
    top: 0;
    z-index: 100;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    margin-bottom: 0;
    padding: 0.75rem calc(50vw - 50% + var(--space-m));
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: background 0.3s, border-color 0.3s;
}

.header-inner{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-m);
}

.header-inner a{
    text-decoration: none;
}

.logo{
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: 0.2s all;
}

.logo svg{
    width: 40px;
    height: 42px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: 0.2s all;
}

.logo:hover svg{
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.logo:hover .logo-text{
    color: var(--color-primary);
}

.logo-text{
    transition: 0.2s all;
    font-size: var(--fs-h4);
    color: var(--color-text);
    font-weight: var(--fw-semibold);
    letter-spacing: -0.01em;
}

nav{
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-list{
    list-style-type: none;
    margin: 0;
    padding: 0;
}

/* Inline nav links (About, etc.) sit next to the Start Now button */
.nav-links{
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a:not(.button){
    color: var(--color-text);
    font-weight: var(--fw-medium);
    font-size: var(--fs-body);
    position: relative;
    padding: 0.25rem 0;
    transition: color 0.2s;
}

.nav-links a:not(.button):hover{
    color: var(--color-primary);
    text-decoration: none;
}

.nav-links a:not(.button)::after{
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: -2px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: left 0.2s, right 0.2s;
}

.nav-links a:not(.button):hover::after{
    left: 0;
    right: 0;
}

.nav-links .button{
    padding: 8px 18px;
    font-size: var(--fs-small);
    border-radius: 10px;
}

@media (max-width: 640px){
    .nav-links{ gap: var(--space-m); }
    .nav-links a:not(.button){ display: none; }
    .logo svg{ width: 34px; height: 36px; }
}

/* 2. _______________ FOOTER _______________ */

footer.footer{
    margin-top: 0;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    padding: var(--space-xxl) calc(50vw - 50% + var(--space-m));
    background: #fafafa;
    border-top: 1px solid var(--color-border);
}

.footer-inner{
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-xxl);
}

/* 2. _______________ HEADER WORKSHEET _______________ */

.header-worksheet{
    padding-bottom: 1rem;
    border-bottom: var(--border-big);
    margin-bottom: 2rem;
}

.header-worksheet .header-inner{
    display: grid;
    grid-template-columns: 1fr 12fr;
}

.header-worksheet nav{
    width: 100%;
}

.header-worksheet nav .nav-list{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.header-worksheet nav .nav-list .left-side{
    display: flex;
    justify-content: start;
    gap: var(--space-s);
}