/*
 * Copyright (c) 2026 Tuan Pham. All Rights Reserved.
 * Website: https://container.tuanpham435.work/
 * Unauthorized copying or modification of this file is strictly prohibited.
 */
:root {
    /* Premium Dark Theme Palette */
    --bg-page: #0d1117;
    --bg-terminal: #161b22;
    --terminal-header: #21262d;
    --terminal-border: #30363d;

    --text-main: #c9d1d9;
    --text-muted: #8b949e;

    --accent-red: #ff7b72;
    --accent-green: #3fb950;
    --accent-yellow: #d2a8ff;
    --accent-blue: #79c0ff;
    --accent-cyan: #56d364;

    /* macOS Window Controls */
    --mac-close: #ff5f56;
    --mac-min: #ffbd2e;
    --mac-max: #27c93f;
    
    --transition-speed: 0.3s;
}

body.light-theme {
    --bg-page: #f0f2f5;
    --bg-terminal: #ffffff;
    --terminal-header: #e1e4e8;
    --terminal-border: #d1d5da;

    --text-main: #24292e;
    --text-muted: #586069;

    --accent-red: #d73a49;
    --accent-green: #28a745;
    --accent-yellow: #a87e00;
    --accent-blue: #0366d6;
    --accent-cyan: #22863a;
}

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

body {
    font-family: 'Fira Code', 'JetBrains Mono', monospace;
    background-color: var(--bg-page);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(121, 192, 255, 0.04), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(210, 168, 255, 0.04), transparent 25%);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.app-container {
    width: 100%;
    max-width: 900px;
    height: 90vh;
    border: 1px solid var(--terminal-border);
    border-radius: 12px;
    background-color: var(--bg-terminal);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.terminal-header {
    height: 40px;
    background-color: var(--terminal-header);
    border-bottom: 1px solid var(--terminal-border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    position: relative;
    z-index: 10;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.1rem;
    position: absolute;
    right: 16px;
    user-select: none;
    transition: transform 0.2s;
    filter: grayscale(0.2);
}

.theme-toggle:hover {
    transform: scale(1.1);
    filter: none;
}

.window-controls {
    display: flex;
    gap: 8px;
    position: absolute;
    left: 16px;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.close {
    background-color: var(--mac-close);
}

.minimize {
    background-color: var(--mac-min);
}

.maximize {
    background-color: var(--mac-max);
}

.window-title {
    flex: 1;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0.5px;
}

.terminal-body {
    padding: clamp(10px, 3vw, 20px) clamp(12px, 4vw, 24px);
    overflow-y: auto;
    flex: 1;
    font-size: clamp(0.85rem, 2.5vw, 1.05rem);
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--terminal-border);
    border-radius: 6px;
    border: 3px solid var(--bg-terminal);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

#terminal-output {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    line-height: 1.6;
    margin-bottom: 10px;
}

.input-line {
    display: flex;
    align-items: center;
    margin-top: 5px;
}

.prompt-host {
    color: var(--accent-blue);
    font-weight: 500;
}

.prompt-sep {
    color: var(--text-main);
}

.prompt-dir {
    color: var(--accent-cyan);
    font-weight: 500;
}

.prompt-char {
    color: var(--text-main);
    margin-right: 12px;
    font-weight: bold;
}

#cmd-input {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: inherit;
    font-size: inherit;
    flex-grow: 1;
    outline: none;
    caret-color: var(--text-main);
}

.system-msg {
    color: var(--text-muted);
}

.question-text {
    color: var(--accent-yellow);
    margin-top: 20px;
    margin-bottom: 8px;
    font-weight: 500;
}

.user-cmd {
    color: var(--text-main);
}

.correct-msg {
    color: var(--accent-green);
    margin-top: 4px;
}

.error-msg {
    color: var(--accent-red);
    margin-top: 4px;
}

.score-msg {
    color: var(--accent-blue);
    margin-top: 25px;
    border-left: 3px solid var(--accent-blue);
    padding: 5px 0 5px 15px;
    background: rgba(121, 192, 255, 0.05);
    border-radius: 0 8px 8px 0;
}

::selection {
    background: rgba(121, 192, 255, 0.3);
    color: var(--text-main);
}

.hidden {
    display: none !important;
}

/* Nano Editor Styles */
#nano-editor {
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-terminal);
    z-index: 20;
    display: flex;
    flex-direction: column;
}

.nano-header {
    background-color: #d2a8ff;
    color: #000;
    font-weight: bold;
    padding: 5px 10px;
    display: flex;
    justify-content: space-between;
}

#nano-textarea {
    flex: 1;
    background-color: transparent;
    border: none;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    padding: 10px;
    resize: none;
    outline: none;
    line-height: 1.5;
}

.nano-shortcuts {
    background-color: var(--text-main);
    color: var(--bg-terminal);
    padding: 5px 10px;
    font-size: 0.9rem;
}

.nano-shortcuts span {
    font-weight: bold;
    margin-right: 5px;
}

/* Vi Editor Styles */
#vi-editor {
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-terminal);
    z-index: 20;
    display: flex;
    flex-direction: column;
}

#vi-textarea {
    flex: 1;
    background-color: transparent;
    border: none;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1.05rem;
    padding: 10px;
    resize: none;
    outline: none;
    line-height: 1.6;
}

/* Caret hack to simulate block cursor in normal mode */
#vi-textarea.vi-normal {
    caret-color: var(--text-main);
}

.vi-status-line {
    background-color: transparent;
    color: var(--text-main);
    padding: 2px 10px;
    font-size: 0.95rem;
    height: 25px;
}

@media screen and (max-width: 768px) {
    body {
        padding: 0;
    }

    .app-container {
        height: 100vh;
        height: 100dvh;
        border-radius: 0;
        border: none;
    }

    .terminal-body {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .window-title {
        font-size: 0.75rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        padding: 0 40px;
    }

    .input-line {
        flex-wrap: wrap;
    }

    #cmd-input {
        width: 100%;
        margin-top: 5px;
        padding-left: 15px;
    }
}

.app-copyright {
    position: absolute;
    bottom: 0px;
    width: 100%;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 10px;
    opacity: 0.5;
    pointer-events: auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    z-index: 100;
}

.app-copyright a {
    color: var(--accent-blue);
    text-decoration: none;
}

.app-copyright a:hover {
    text-decoration: underline;
}