:root {
    --font-serif: 'Cinzel', serif;
    --font-sans: 'Lato', sans-serif;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --accent: #d4af37; /* Gold accent */
    --overlay-light: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.6));
    --overlay-dark: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.85));
}

* { box-sizing: border-box; }

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: #111;
}

/* Backgrounds */
.bg-image {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    transition: background-image 0.8s ease-in-out, opacity 0.5s;
    z-index: -2;
}

.bg-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--overlay-dark);
    z-index: -1;
    transition: background 0.5s;
}

[data-theme="light"] .bg-overlay {
    background: var(--overlay-light);
}

/* Typography & Layout */
.verse-display {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeIn 1s ease-out;
}

h1#verse-text {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.3;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    font-weight: 400;
}

p#verse-reference {
    font-size: 1.2rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
}

/* UI Elements */
.fade-ui {
    position: absolute;
    width: 100%;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    opacity: 1;
    transition: opacity 0.5s;
}

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

.top-nav { top: 0; left: 0; font-size: 0.9rem; letter-spacing: 1px; }
.bottom-nav { bottom: 0; left: 0; }

button {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-family: var(--font-sans);
    border-radius: 4px;
    transition: all 0.3s;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

button:hover {
    background: rgba(255,255,255,0.1);
    border-color: white;
}

button:disabled {
    opacity: 0.3;
    cursor: default;
    border-color: transparent;
}

.nav-arrow { font-size: 1.5rem; border: none; padding: 0 1rem; }
.right-controls { display: flex; gap: 10px; }
.actions { display: flex; gap: 15px; }

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s;
}

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

.modal-content {
    background: #222;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid #333;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-header h2 { margin: 0; font-family: var(--font-serif); }

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day {
    padding: 10px;
    text-align: center;
    background: #333;
    border-radius: 4px;
    cursor: pointer;
}

.calendar-day:hover { background: var(--accent); color: #000; }
.calendar-day.active { background: var(--accent); color: #000; font-weight: bold; }
.calendar-day.future { opacity: 0.3; pointer-events: none; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Mobile Tweaks */
@media (max-width: 600px) {
    .actions { display: none; } /* Simplify mobile footer */
}