/* ============================================================
   nav.css — Shared top navigation bar
   ============================================================ */

:root {
    --nav-height: 56px;
    --nav-bg: #ffffff;
    --nav-border: #f0f0f0;
    --nav-text: #333333;
    --nav-text-muted: #888888;
    --nav-active: #ff006e;
    --nav-hover-bg: #fff5f8;
    --nav-font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ── Base bar ── */
#appNav {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0 24px;
    z-index: 1000;
    font-family: var(--nav-font);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

/* ── Center links ── */
.nav-links {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 500;
    color: var(--nav-text);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.nav-links a:hover {
    background: var(--nav-hover-bg);
    color: var(--nav-active);
}

.nav-links a.active {
    color: var(--nav-active);
    background: var(--nav-hover-bg);
    font-weight: 600;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--nav-active);
    border-radius: 2px 2px 0 0;
}

.nav-links li {
    position: relative;
}

/* ── Right side auth ── */
.nav-auth {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-user-email {
    font-size: 0.82em;
    color: var(--nav-text-muted);
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-login-btn {
    background: linear-gradient(135deg, #ff006e 0%, #ff2e8a 100%);
    color: white;
    border: none;
    padding: 7px 18px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.15s, transform 0.15s;
    white-space: nowrap;
    display: inline-block;
}

.nav-login-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.nav-logout-btn {
    background: none;
    border: 1px solid #e0e0e0;
    color: var(--nav-text-muted);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.82em;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    white-space: nowrap;
}

.nav-logout-btn:hover {
    border-color: #ff006e;
    color: #ff006e;
}

/* ── Hamburger button (mobile only) ── */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: background 0.15s;
    justify-self: end;
}

.nav-hamburger:hover {
    background: var(--nav-hover-bg);
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--nav-text);
    border-radius: 2px;
    transition: all 0.25s;
    transform-origin: center;
}

/* Hamburger → X animation */
.nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile drawer ── */
.nav-mobile-drawer {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--nav-border);
    padding: 12px 16px 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    z-index: 999;
    flex-direction: column;
    gap: 4px;
}

.nav-mobile-drawer.open {
    display: flex;
}

.nav-mobile-drawer a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 500;
    color: var(--nav-text);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.nav-mobile-drawer a:hover,
.nav-mobile-drawer a.active {
    background: var(--nav-hover-bg);
    color: var(--nav-active);
}

.nav-mobile-drawer .nav-mobile-divider {
    height: 1px;
    background: var(--nav-border);
    margin: 8px 0;
}

.nav-mobile-drawer .nav-mobile-auth {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
}

.nav-mobile-drawer .nav-mobile-email {
    font-size: 0.82em;
    color: var(--nav-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
}

/* ── Responsive ── */
@media (max-width: 640px) {
    #appNav {
        padding: 0 16px;
        grid-template-columns: 1fr auto;
    }

    .nav-links,
    .nav-auth {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }
}