/* ==========================================================================
   40K COGITATOR TERMINAL - STYLESHEET
   ========================================================================== */

:root {
    --bg-color: #050a05;
    --main-color: #00ff66;
    --dim-color: #005522;
    --border-color: #00aa44;
    --glow-color: rgba(0, 255, 102, 0.4);
    --alert-paused: #ff2a2a;
    --panel-bg: #031408;
    --font-family: 'Courier New', Courier, monospace;
}

/* Theme variations */
body.theme-green {
    --bg-color: #040d06;
    --main-color: #00ff66;
    --dim-color: #006622;
    --border-color: #00aa44;
    --glow-color: rgba(0, 255, 102, 0.4);
    --panel-bg: #071c0c;
}

body.theme-red {
    --bg-color: #0d0404;
    --main-color: #ff3333;
    --dim-color: #660000;
    --border-color: #aa0000;
    --glow-color: rgba(255, 51, 51, 0.4);
    --panel-bg: #1c0707;
}

body.theme-gold {
    --bg-color: #0d0b04;
    --main-color: #ffcc00;
    --dim-color: #665200;
    --border-color: #aa8800;
    --glow-color: rgba(255, 204, 0, 0.4);
    --panel-bg: #1c1707;
}

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

body {
    background-color: var(--bg-color);
    color: var(--main-color);
    font-family: var(--font-family);
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* CRT Scanline Screen Overlay Effect */
.crt-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(
        rgba(18, 16, 16, 0) 50%, 
        rgba(0, 0, 0, 0.25) 50%
    );
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 100;
    opacity: 0.8;
}

/* CSS GRID LAYOUT */
.cogitator-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas: 
        "header header"
        "player playlist"
        "footer footer";
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
    border: 3px solid var(--border-color);
    padding: 20px;
    background-color: var(--panel-bg);
    box-shadow: 0 0 20px var(--glow-color);
}

/* HEADER */
.terminal-header {
    grid-area: header;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.header-title h1 {
    font-size: 1.8rem;
    letter-spacing: 2px;
    text-shadow: 0 0 8px var(--main-color);
}

.subtitle {
    font-size: 0.85rem;
    color: var(--border-color);
}

.thought-of-the-day {
    background-color: var(--bg-color);
    padding: 8px 12px;
    border: 1px dashed var(--border-color);
    font-size: 0.85rem;
}

.theme-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
    flex-wrap: wrap;
}

.theme-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--main-color);
    padding: 5px 12px;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: bold;
    transition: all 0.2s ease;
}

.theme-btn:hover, .theme-btn.active {
    background-color: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 10px var(--glow-color);
}

/* PLAYER SECTION */
.player-section {
    grid-area: player;
    border: 2px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

/* Playing/Paused State Card Animations */
.player-section.is-playing {
    border-color: var(--main-color);
    box-shadow: inset 0 0 15px var(--glow-color), 0 0 15px var(--glow-color);
    animation: pulseBorder 2s infinite alternate;
}

.player-section.is-paused {
    border-color: var(--alert-paused);
    box-shadow: inset 0 0 10px rgba(255, 42, 42, 0.3);
}

@keyframes pulseBorder {
    0% { box-shadow: inset 0 0 10px var(--glow-color), 0 0 10px var(--glow-color); }
    100% { box-shadow: inset 0 0 25px var(--glow-color), 0 0 25px var(--glow-color); }
}

.artwork-container {
    position: relative;
    width: 100%;
    max-height: 320px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
}

.artwork-container img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    filter: sepia(0.3) contrast(1.2);
    transition: transform 0.5s ease;
}

.is-playing .artwork-container img {
    transform: scale(1.03);
}

.playback-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    font-weight: bold;
    font-size: 0.8rem;
}

.is-playing .playback-badge {
    color: var(--main-color);
    border-color: var(--main-color);
}

.is-paused .playback-badge {
    color: var(--alert-paused);
    border-color: var(--alert-paused);
}

/* Equalizer Visualizer */
.equalizer {
    display: flex;
    gap: 5px;
    height: 25px;
    align-items: flex-end;
    margin-top: 5px;
}

.equalizer .bar {
    width: 12px;
    height: 4px;
    background-color: var(--dim-color);
    transition: height 0.2s ease;
}

.is-playing .equalizer .bar {
    background-color: var(--main-color);
    animation: bounce 0.8s infinite ease-in-out alternate;
}

.is-playing .equalizer .bar:nth-child(1) { animation-delay: 0.1s; }
.is-playing .equalizer .bar:nth-child(2) { animation-delay: 0.3s; }
.is-playing .equalizer .bar:nth-child(3) { animation-delay: 0.2s; }
.is-playing .equalizer .bar:nth-child(4) { animation-delay: 0.4s; }
.is-playing .equalizer .bar:nth-child(5) { animation-delay: 0.15s; }

@keyframes bounce {
    0% { height: 4px; }
    100% { height: 25px; }
}

/* Time & Progress */
.time-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

input[type="range"] {
    flex-grow: 1;
    accent-color: var(--main-color);
    cursor: pointer;
}

/* Playback Buttons */
.playback-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.ctrl-btn {
    flex: 1;
    padding: 12px;
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    color: var(--main-color);
    font-family: var(--font-family);
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ctrl-btn:hover {
    background-color: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 10px var(--glow-color);
}

.play-btn {
    border-width: 3px;
    font-size: 1.1rem;
}

/* Volume Bar */
.volume-container {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    border-top: 1px dashed var(--dim-color);
    padding-top: 10px;
}

/* PLAYLIST SECTION */
.playlist-section {
    grid-area: playlist;
    border: 2px solid var(--border-color);
    padding: 15px;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    max-height: 520px;
    overflow-y: auto;
}

.playlist-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 12px;
}

.playlist-grid {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border: 1px solid var(--dim-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.playlist-item:hover {
    border-color: var(--main-color);
    background-color: rgba(0, 255, 102, 0.05);
}

.playlist-item.active {
    border-color: var(--main-color);
    background-color: var(--dim-color);
    font-weight: bold;
}

.playlist-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.playlist-item-title {
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* FOOTER */
.terminal-footer {
    grid-area: footer;
    border-top: 2px solid var(--border-color);
    padding-top: 10px;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--border-color);
}

.pulse-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: var(--main-color);
    border-radius: 50%;
    margin-right: 5px;
    animation: blink 1.2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVE DESIGN)
   ========================================================================== */

/* MEDIA QUERY 1: TABLET (Max width: 900px) */
@media screen and (max-width: 900px) {
    .cogitator-grid {
        grid-template-columns: 1fr;
        grid-template-areas: 
            "header"
            "player"
            "playlist"
            "footer";
    }

    .playlist-section {
        max-height: 350px;
    }
}

/* MEDIA QUERY 2: MOBILE (Max width: 600px) */
@media screen and (max-width: 600px) {
    body {
        padding: 5px;
    }

    .cogitator-grid {
        padding: 10px;
        gap: 15px;
    }

    .header-title h1 {
        font-size: 1.2rem;
    }

    .thought-of-the-day {
        font-size: 0.75rem;
    }

    .theme-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .theme-btn {
        width: 100%;
        text-align: center;
    }

    .playback-controls {
        flex-direction: column;
    }

    .artwork-container img {
        height: 200px;
    }

    .terminal-footer {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
}