/* =====================================================
   herbalism.css  —  The Philosophy of Herbalism page
   ===================================================== */

/* ---- Header ---- */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 3rem 4rem;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.now-playing-header {
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: var(--text-light);
}

.now-playing-header.visible { opacity: 0.6; }

.header-controls {
    position: fixed;
    top: 3rem;
    right: 4rem;
    z-index: 101;
}

/* ---- Hamburger (mobile only) ---- */

.hamburger {
    display: none;
    position: fixed;
    top: 3rem;
    right: 10rem;
    z-index: 102;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 24px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-light);
    margin-bottom: 6px;
    transition: all 0.3s ease;
}

.hamburger span:last-child { margin-bottom: 0; }

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(8px, 8px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

/* ---- Mobile dropdown ---- */

.mobile-nav-dropdown {
    display: none;
    position: fixed;
    top: 7rem;
    right: 4rem;
    background: rgba(10,10,10,0.95);
    border: 1px solid var(--text-light);
    padding: 1.5rem;
    z-index: 101;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.mobile-nav-dropdown.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.mobile-nav-dropdown a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.6;
    padding: 0.75rem 0;
    transition: opacity 0.3s ease;
}

.mobile-nav-dropdown a:hover,
.mobile-nav-dropdown a.active { opacity: 1; }

/* ---- Desktop sidebar nav ---- */

nav {
    position: fixed;
    left: 4rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    transition: opacity 0.3s ease;
}

nav.exploding { pointer-events: none; }
nav.hidden    { opacity: 0; pointer-events: none; }

nav ul { list-style: none; }

nav li {
    margin-bottom: 2rem;
    position: relative;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.4;
    transition: opacity 0.3s ease;
    display: block;
}

nav a:hover  { opacity: 1; }
nav a.active { opacity: 1; }

/* ---- Particle explosion ---- */

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--text-light);
    border-radius: 50%;
    pointer-events: none;
    animation: explode 0.8s ease-out forwards;
}

@keyframes explode {
    0%   { opacity: 1; transform: translate(0,0) scale(1); }
    100% { opacity: 0; transform: translate(var(--tx),var(--ty)) scale(0); }
}

/* ---- Lyrics nav (replaces sidebar nav while playing) ---- */

.lyrics-nav {
    position: fixed;
    left: 4rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    opacity: 0;
    transition: opacity 0.5s ease 0.8s;
    max-width: 300px;
}

.lyrics-nav.visible { opacity: 1; }

.lyrics-nav-text {
    color: var(--text-light);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    line-height: 2;
    opacity: 0.4;
    white-space: pre-line;
}

/* ---- Sound toggle ---- */

.sound-toggle {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: opacity 0.3s ease;
    padding: 0;
}

.sound-toggle:hover { opacity: 0.6; }

/* ---- Gallery ---- */

.gallery {
    padding: 12rem 6rem 6rem;
    max-width: 1600px;
    margin: 0 auto;
}

/* ---- Album items ---- */

.album-item {
    margin-bottom: 6rem;
    cursor: pointer;
    position: relative;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s ease forwards;
}

.album-item:nth-child(1) { animation-delay: 0.1s; }
.album-item:nth-child(2) { animation-delay: 0.2s; }
.album-item:nth-child(3) { animation-delay: 0.3s; }
.album-item:nth-child(4) { animation-delay: 0.4s; }
.album-item:nth-child(5) { animation-delay: 0.5s; }

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

.album-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

/* Smaller padded images */
.album-item[data-title="The-4R-Program"] img,
.album-item[data-title="Curcuminoids"] img,
.album-item[data-title="Monoterpenes"] img {
    padding: 100px;
}

.album-item:hover img  { transform: scale(1.01); opacity: 0.85; }
.album-item.playing img { opacity: 1; }

/* Playing indicator dot */
.album-item::after {
    content: '';
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-light);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.album-item.playing::after {
    opacity: 1;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.4; }
}

/* ---- Responsive ---- */

@media (max-width: 1024px) {
    header { padding: 2rem; }
    .header-controls { top: 2rem; right: 2rem; }
    nav { left: 2rem; }
    nav li { margin-bottom: 1.5rem; }
    nav a { font-size: 0.75rem; }
    .lyrics-nav { left: 2rem; max-width: 250px; }
    .lyrics-nav-text { font-size: 0.75rem; }
    .gallery { padding: 10rem 3rem 4rem; }
    .album-item { margin-bottom: 4rem; }
}

@media (max-width: 640px) {
    header { padding: 1.5rem; gap: 0.25rem; }
    .logo { font-size: 0.875rem; }
    .now-playing-header { font-size: 0.75rem; }
    .header-controls { top: 1.5rem; right: 1.5rem; }
    .sound-toggle { font-size: 0.75rem; }
    .hamburger { display: block; top: 1.5rem; right: 5.5rem; }
    .mobile-nav-dropdown { display: block; right: 1.5rem; top: 5rem; }
    nav  { display: none !important; }
    .lyrics-nav { display: none !important; }
    .gallery { padding: 2rem 1.5rem 3rem; }
    .album-item { margin-bottom: 3rem; }
    .album-item[data-title="The-4R-Program"] img,
    .album-item[data-title="Curcuminoids"] img,
    .album-item[data-title="Monoterpenes"] img { padding: 0; }
    .album-item::after { top: 1rem; right: 1rem; width: 10px; height: 10px; }
}