/* ============================================================
   topbar.css — Sticky topbar, wordmark dropdown, action icon buttons
   ============================================================ */

.topbar {
    border-bottom: 1px solid var(--line);
    background: var(--topbar-bg);
    backdrop-filter: blur(6px);
    padding: 0.85rem 1.3rem;
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
}
.topbar-copy { min-width: 0; flex: 1; position: relative; }

/* Wordmark button */
.topbar-wordmark-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.38rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.28rem 0.42rem 0.28rem 0;
    border-radius: 8px;
    line-height: 1.3;
}
.topbar-wordmark-btn:hover .wordmark-text { opacity: 0.8; }

.wordmark-text {
    font-family: 'Inter Display', Inter, system-ui, sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    white-space: nowrap;
    display: inline-block;
    padding-right: 6px;
    background: var(--wordmark-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity 0.14s;
}
.wordmark-chevron {
    color: var(--wordmark-chevron);
    flex-shrink: 0;
    transition: transform 0.18s;
}
.topbar-wordmark-btn[aria-expanded="true"] .wordmark-chevron { transform: rotate(180deg); }

/* Wordmark dropdown menu */
.wordmark-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 240px;
    background: var(--menu-bg);
    border: 1px solid var(--menu-border);
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
    z-index: 50;
    padding: 0.38rem;
    display: none;
}
.wordmark-menu.show { display: block; }

.wordmark-menu-header {
    padding: 0.45rem 0.7rem 0.35rem;
    border-bottom: 1px solid var(--menu-head-border);
    margin-bottom: 0.28rem;
}
.wordmark-menu-header p      { font-size: 0.72rem; color: var(--menu-head-sub); margin-top: 0.1rem; }
.wordmark-menu-header strong { font-size: 0.85rem; color: var(--menu-head-strong); font-weight: 600; }

/* Topbar action icons */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}
.topbar-icon-btn {
    width: 34px;
    height: 34px;
    border: none;
    background: transparent;
    color: var(--topbar-icon-color);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: background 0.14s, color 0.14s;
}
.topbar-icon-btn:hover { background: var(--topbar-icon-hover-bg); color: var(--topbar-icon-hover-color); }
.topbar-icon-btn.active { background: var(--topbar-icon-hover-bg); color: var(--topbar-icon-hover-color); }

/* Shared dropdown menu (topbar dropdowns) */
.topbar-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 220px;
    background: var(--menu-bg);
    border: 1px solid var(--menu-border);
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.45);
    z-index: 50;
    padding: 0.38rem;
    display: none;
}
.topbar-menu.show { display: block; }

.topbar-menu-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    border: none;
    background: transparent;
    color: var(--menu-item-color);
    font-size: 0.85rem;
    font-family: inherit;
    padding: 0.52rem 0.7rem;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    text-align: left;
    transition: background 0.12s, color 0.12s;
}
.topbar-menu-item:hover { background: var(--menu-item-hover-bg); color: var(--menu-item-hover-color); }
.topbar-menu-item svg    { flex-shrink: 0; opacity: 0.7; }

.topbar-menu-divider {
    height: 1px;
    background: var(--menu-divider);
    margin: 0.28rem 0.5rem;
}
.topbar-menu-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--menu-label-color);
    padding: 0.4rem 0.7rem 0.15rem;
}

/* Theme toggle icon visibility */
.theme-sun-icon  { display: block; }
.theme-moon-icon { display: none;  }
[data-theme="light"] .theme-sun-icon  { display: none;  }
[data-theme="light"] .theme-moon-icon { display: block; }