/* ===== HEADER & NAVIGATION ===== */

.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    width: 100%;
    padding: 0.9rem clamp(1.2rem, 4vw, 3rem);
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode .header {
    background: rgba(23, 16, 19, 0.88);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.3);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.logo img {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    object-fit: cover;
    box-shadow: 0 6px 14px rgba(194, 109, 132, 0.2);
}

.logo_text h1 {
    margin: 0;
    color: var(--primary-deep);
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.logo_text p {
    margin: 0;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.nav_button, .nav_link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: 999px;
    background: var(--accent-gradient);
    color: #ffffff !important;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 6px 16px rgba(194, 109, 132, 0.22);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    border: none;
}

.nav_button:hover, .nav_link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(194, 109, 132, 0.32);
    filter: brightness(1.05);
}

/* The mobile-only "Home" link lives inside the logo row; hidden on desktop,
   shown only within the mobile media query below. */
.mobile-home {
    display: none;
}

#dark-mode-toggle {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 50%;
    border: 1px solid var(--line);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-alt);
    color: var(--text);
    font-size: 1.05rem;
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

#dark-mode-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
}

.menu-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: var(--surface-alt);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: 0;
    transition: transform 0.2s ease;
}

.menu-btn span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-btn.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-btn.open span:nth-child(2) {
    opacity: 0;
}

.menu-btn.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 24, 0.45);
    backdrop-filter: blur(4px);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: min(82vw, 300px);
    height: 100vh;
    padding: 2rem 1.5rem;
    background: var(--surface);
    border-left: 1px solid var(--line);
    box-shadow: -10px 0 35px rgba(0, 0, 0, 0.15);
    transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.drawer.open {
    right: 0;
}

.drawer h2 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-deep);
    margin-bottom: 0.5rem;
}

.drawer hr {
    border: none;
    border-top: 1px solid var(--line);
    margin-bottom: 0.5rem;
}

.drawer a {
    display: block;
    padding: 0.85rem 1.1rem;
    border-radius: 12px;
    background: var(--surface-alt);
    color: var(--text);
    font-weight: 600;
    transition: background 0.2s ease, transform 0.2s ease;
}

.drawer a:hover {
    background: var(--primary-soft);
    color: var(--accent-strong);
    transform: translateX(3px);
}

body.dark-mode .drawer a:hover {
    background: var(--primary-soft);
    color: #ffffff;
}

/* Login / Sign Out link pinned to the very bottom of the drawer.
   margin-top: auto pushes it below the theme toggle and all menu items. */
.drawer #auth-link {
    margin-top: auto;
    margin-bottom: 0.5rem;
}


/* Dark mode toggle inside the drawer (slide switch) */
.drawer-theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    padding: 0.85rem 1.1rem;
    border: none;
    border-radius: 12px;
    background: var(--surface-alt);
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: background 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}

.drawer-theme-toggle:hover {
    background: var(--primary-soft);
    transform: translateX(3px);
}

.drawer-theme-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.drawer-theme-label {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
}

.drawer-theme-switch {
    position: relative;
    width: 46px;
    height: 24px;
    flex-shrink: 0;
    border-radius: 999px;
    background: rgba(194, 109, 132, 0.18);
    border: 1px solid rgba(194, 109, 132, 0.35);
    transition: background 0.25s ease;
}

.drawer-theme-knob {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

body.dark-mode .drawer-theme-switch {
    background: var(--primary);
    border-color: var(--primary);
}

body.dark-mode .drawer-theme-knob {
    transform: translateX(22px);
}

/* Slide animation on the label text when the theme changes */
.drawer-theme-label {
    display: inline-block;
    animation: theme-label-slide-in 0.25s ease;
}

@keyframes theme-label-slide-in {
    from {
        opacity: 0;
        transform: translateX(-8px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}