/* Reset & Base */
:root {
    --bg-color: #0f172a;
    /* Slate 900 */
    --text-color: #f1f5f9;
    /* Slate 100 */
    --accent-color: #38bdf8;
    /* Sky 400 */
    --panel-bg: rgba(15, 23, 42, 0.8);
    --border-color: rgba(255, 255, 255, 0.1);
    --font-main: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.1) 0px, transparent 50%);
    color: var(--text-color);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Wrapper */
#wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

/* Scroll Container */
#scroll-container {
    height: 100%;
    overflow-y: auto;
    padding: 0 15%;
    /* Margins for reading */
    position: relative;
    scroll-behavior: auto;
    /* JS controlled */
    scrollbar-width: none;
    /* Firefox */
}

#scroll-container::-webkit-scrollbar {
    display: none;
}

/* Chrome/Safari */

/* Content */
#content-area {
    padding-top: 45vh;
    /* Eye level approximately */
    /* Large bottom padding to ensure the last line can scroll up to the eye level */
    padding-bottom: 50vh;
    min-height: 100%;
}

#markdown-output {
    font-size: 60px;
    line-height: 1.4;
    font-weight: 500;
    text-align: left;
    outline: none;
    transition: font-size 0.2s ease, text-align 0.3s;
}

/* Typography for MD */
#markdown-output h1 {
    font-size: 1.5em;
    color: #fff;
    margin-bottom: 0.5em;
    font-weight: 700;
    letter-spacing: -0.02em;
}

#markdown-output h2 {
    font-size: 1.3em;
    color: #e2e8f0;
    margin-top: 1em;
    margin-bottom: 0.5em;
    font-weight: 600;
}

#markdown-output p {
    margin-bottom: 1em;
    color: #cbd5e1;
}

#markdown-output ul,
#markdown-output ol {
    margin-bottom: 1em;
    padding-left: 1.2em;
}

#markdown-output li {
    margin-bottom: 0.5em;
}

#markdown-output strong {
    color: var(--accent-color);
}

#markdown-output blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1em;
    margin-left: 0;
    font-style: italic;
    color: #94a3b8;
}

/* Placeholder */
#placeholder {
    text-align: center;
    color: #94a3b8;
    margin-top: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
}

#placeholder h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #fff;
    letter-spacing: -1px;
}

#btn-hero-open {
    background: var(--accent-color);
    color: #0f172a;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4);
    margin: 1.5rem auto 0;
    width: fit-content;
}

#btn-hero-open:hover {
    transform: scale(1.05);
    background: #fff;
    box-shadow: 0 6px 25px rgba(255, 255, 255, 0.3);
}

/* Control Bar */
#control-bar {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    background: var(--panel-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 12px 28px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    transition: transform 0.3s, opacity 0.3s;
}

#control-bar.hidden {
    transform: translateX(-50%) translateY(150%);
    opacity: 0;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.divider {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, transparent, var(--border-color), transparent);
}

/* Buttons */
button {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    justify-content: center;
}

button:active {
    transform: scale(0.95);
}

.icon-btn {
    padding: 8px;
    border-radius: 12px;
    color: #94a3b8;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.action-btn {
    background: var(--accent-color);
    color: #0f172a;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

.action-btn:hover {
    /* scale effect */
    background: #fff;
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
}

.action-btn.active {
    background: #ef4444;
    /* Red for Stop */
    color: white;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

.action-btn.active:hover {
    background: #ff6b6b;
}

/* Sliders */
.slider-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    position: relative;
    top: -2px;
}

.label {
    font-size: 0.65rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-left: 2px;
}

input[type=range] {
    -webkit-appearance: none;
    width: 120px;
    background: transparent;
    cursor: pointer;
    margin-top: 2px;
}

input[type=range]:focus {
    outline: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 14px;
    width: 14px;
    border-radius: 50%;
    background: #fff;
    margin-top: -5px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

input[type=range]:active::-webkit-slider-runnable-track {
    background: rgba(56, 189, 248, 0.3);
}

/* Mirror mode util effectively flipping X */
.mirrored {
    transform: scaleX(-1);
}