@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

:root {
    --bg-color: #050505;
    --text-color: #ffffff;
    --timer-font-size: 15vw;
    --settings-bg: rgba(20, 20, 20, 0.95);
    --settings-text: #ffffff;
    --settings-border: rgba(255, 255, 255, 0.1);
    --btn-bg: rgba(255, 255, 255, 0.1);
    --btn-hover: rgba(255, 255, 255, 0.2);
}

body.light-theme,
:root.light-theme body {
    --bg-color: #f0f0f0;
    --text-color: #111111;
    --settings-bg: rgba(255, 255, 255, 0.95);
    --settings-text: #000000;
    --settings-border: rgba(0, 0, 0, 0.1);
    --btn-bg: rgba(0, 0, 0, 0.05);
    --btn-hover: rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#countdown-container {
    position: relative;
    z-index: 10;
    text-align: center;
}

#timer {
    font-size: var(--timer-font-size);
    font-weight: 200;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.05em;
    text-shadow: 0 0 20px rgba(125, 125, 125, 0.1);
    opacity: 0.9;
    transition: font-size 0.2s ease;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* --- Fonts --- */
.font-system {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
}

.font-monospace {
    font-family: "Courier New", Courier, monospace;
    letter-spacing: -0.1em;
}

.font-serif {
    font-family: "Times New Roman", Times, serif;
    font-style: italic;
}

.font-digital {
    font-family: 'Share Tech Mono', monospace;
    letter-spacing: 0.05em;
}

/* --- UI Elements --- */

#instruction-label {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--btn-bg);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    z-index: 100;
    opacity: 0;
    transition: opacity 1s ease;
    pointer-events: none;
}

#instruction-label.fade-in {
    opacity: 1;
}

#settings-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 100;
    color: var(--text-color);
    opacity: 0.5;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#settings-btn:hover {
    opacity: 1;
    transform: rotate(90deg);
}

/* --- Settings Panel --- */

#settings-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* Dim background */
    z-index: 200;
    display: flex;
    justify-content: center;
    align-items: center;
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 1;
    transition: opacity 0.3s ease, visibility 0.3s;
}

#settings-panel.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.settings-content {
    background: var(--settings-bg);
    color: var(--settings-text);
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    border: 1px solid var(--settings-border);
}

.settings-content h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-weight: 400;
}

#close-settings {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--settings-text);
    line-height: 1;
}

.setting-item {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item label {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.setting-item select {
    width: 100%;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--settings-border);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    box-sizing: border-box;
}

.setting-item select option {
    font-family: inherit;
    background: var(--bg-color);
    color: var(--text-color);
}

.setting-item input[type="range"] {
    width: 100%;
    /* Remove padding/border from range to allow full travel */
    padding: 0; 
    border: none;
    background: transparent;
    height: 40px; /* Match approximate height of select inputs */
    cursor: pointer;
    box-sizing: border-box;
    display: block; /* Ensure it takes full line */
}

/* --- Branding --- */
.branding {
    margin-top: 30px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--settings-border);
}

.branding a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    color: var(--settings-text);
    opacity: 0.7;
    transition: opacity 0.2s ease;
    font-size: 0.9rem;
}

.branding a:hover {
    opacity: 1;
}

.branding svg {
    display: block;
    width: 20px;
    height: 20px;
}

.branding span {
    /* Resetting specific line-height to let flexbox center naturally */
    line-height: normal; 
}