/* Using CSS variables for easy theme switching */
:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --primary-color: #4a90e2;
    --panel-bg: #1e1e1e;
    --button-bg: #333;
    --button-hover-bg: #444;
    --input-bg: #252525;
    --border-color: #3a3a3a;
}

.light-theme {
    --bg-color: #f4f4f4;
    --text-color: #121212;
    --primary-color: #007aff;
    --panel-bg: #ffffff;
    --button-bg: #e0e0e0;
    --button-hover-bg: #d0d0d0;
    --input-bg: #e8e8e8;
    --border-color: #cccccc;
}

/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: 'Fira Code', monospace;
    overflow: hidden; /* Prevents scrollbars */
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

#app-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
    position: relative;
}

/* Timer Display */
#timer-display {
    font-size: clamp(8rem, 20vw, 15rem); /* Responsive font size */
    font-weight: 700;
    letter-spacing: -0.02em;
    cursor: pointer;
    user-select: none; /* Prevents text selection on click */
}

/* Controls */
.controls {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    opacity: 1;
    transition: opacity 0.3s ease;
}

button {
    font-family: 'Fira Code', monospace;
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: var(--button-hover-bg);
}

#settings-btn {
    padding: 0.75rem;
    font-size: 1.2rem;
    line-height: 1;
}

/* Settings Panel */
#settings-panel {
    position: absolute;
    background-color: var(--panel-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    z-index: 100;
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#settings-panel.hidden {
    display: none;
}

#close-settings-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    opacity: 0.7;
}
#close-settings-btn:hover {
    opacity: 1;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.radio-group, .time-inputs {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.time-inputs input {
    width: 60px;
    padding: 0.5rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 1rem;
    text-align: center;
}
.time-inputs span {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Hide number input spinners */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
input[type=number] {
  -moz-appearance: textfield;
}

/* Zen Mode */
.zen-mode .controls,
.zen-mode #settings-btn {
    opacity: 0;
    pointer-events: none; /* Makes them unclickable */
}