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

:root {
    --bg-primary: burlywood;
    --bg-secondary: white;
    --bg-tertiary: #fafafa;
    --bg-toolbar: #f5f5f5;
    --bg-shortcuts: #f5f5f5;
    --bg-stats: #f5f5dc;
    --text-primary: #333;
    --text-secondary: #666;
    --text-tertiary: #555;
    --border-color: #ddd;
    --button-bg: white;
    --button-border: #ddd;
    --button-hover: burlywood;
    --button-active: #996515;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --transition-duration: 0.3s;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-theme {
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-toolbar: #2a2a2a;
    --bg-shortcuts: #2a2a2a;
    --bg-stats: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-tertiary: #e0e0e0;
    --border-color: #505050;
    --button-bg: #2a2a2a;
    --button-border: #505050;
    --button-hover: burlywood;
    --button-active: #d4a574;
    --shadow-color: rgba(0, 0, 0, 0.8);
}

body.dark-theme .container {
    border: 1px solid #404040;
}

body.dark-theme .editor-container {
    border: 2px solid #606060;
}

body.dark-theme .toolbar {
    border: 1px solid #404040;
}

body.dark-theme .toolbar button {
    border: 1px solid #606060;
}

body.dark-theme .shortcuts {
    border: 1px solid #404040;
}

body.dark-theme .stats {
    border: 1px solid #404040;
}

body.dark-theme .theme-toggle {
    border: 1px solid #606060;
}

body.dark-theme .reveal-toggle {
    border: 1px solid rgba(222, 184, 135, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background var(--transition-duration) var(--transition-timing);
}

.container {
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 20px 60px var(--shadow-color);
    width: 100%;
    max-width: 800px;
    padding: 30px;
    transition: background var(--transition-duration) var(--transition-timing),
                box-shadow var(--transition-duration) var(--transition-timing),
                transform var(--transition-duration) var(--transition-timing);
    animation: slideUp 0.6s var(--transition-timing);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 28px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: color var(--transition-duration) var(--transition-timing);
    animation: fadeInDown 0.6s var(--transition-timing) 0.1s both;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    animation: spin 0.8s var(--transition-timing) 0.3s both;
}

@keyframes spin {
    from {
        opacity: 0;
        transform: rotate(-180deg) scale(0.5);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 14px;
    transition: color var(--transition-duration) var(--transition-timing);
    animation: fadeIn 0.6s var(--transition-timing) 0.2s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.toolbar {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    padding: 10px;
    background: var(--bg-toolbar);
    border-radius: 8px;
    flex-wrap: wrap;
    transition: background var(--transition-duration) var(--transition-timing);
    animation: fadeIn 0.6s var(--transition-timing) 0.3s both;
}

.toolbar button {
    padding: 8px 12px;
    border: 1px solid var(--button-border);
    background: var(--button-bg);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-duration) var(--transition-timing);
    position: relative;
    overflow: hidden;
}

.toolbar button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(139, 90, 43, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.toolbar button:hover::before {
    width: 300px;
    height: 300px;
}

.toolbar button:hover {
    background: var(--button-hover);
    color: white;
    border-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(222, 184, 135, 0.3);
}

.toolbar button.active {
    background: var(--button-active);
    color: white;
    border-color: var(--button-active);
    box-shadow: 0 2px 8px rgba(139, 90, 43, 0.4);
}

.editor-container {
    position: relative;
    min-height: 400px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    background: var(--bg-tertiary);
    transition: background var(--transition-duration) var(--transition-timing),
                border-color var(--transition-duration) var(--transition-timing),
                box-shadow var(--transition-duration) var(--transition-timing);
    animation: fadeIn 0.6s var(--transition-timing) 0.4s both;
}

.editor-container:focus-within {
    border-color: var(--button-hover);
    box-shadow: 0 0 0 3px rgba(222, 184, 135, 0.1);
}

#editor {
    width: 100%;
    min-height: 400px;
    font-size: 16px;
    line-height: 1.8;
    outline: none;
    color: var(--text-primary);
    text-shadow: none;
    caret-color: burlywood;
    transition: color var(--transition-duration) var(--transition-timing);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

#editor ol,
#editor ul {
    margin-left: 20px;
    margin-top: 8px;
    margin-bottom: 8px;
}

#editor li {
    margin-bottom: 6px;
}

#editor.hidden {
    color: transparent;
    text-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
    transition: text-shadow var(--transition-duration) var(--transition-timing);
}

body.dark-theme #editor.hidden {
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

#editor::selection {
    background: rgba(139, 90, 43, 0.5);
    text-shadow: none;
    color: white;
}

.reveal-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 8px 16px;
    background: var(--button-hover);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all var(--transition-duration) var(--transition-timing);
    display: flex;
    align-items: center;
    gap: 6px;
}

.reveal-toggle:hover {
    background: var(--button-active);
    transform: scale(1.05);
}

.reveal-toggle:active {
    transform: scale(0.95);
}

.shortcuts {
    margin-top: 20px;
    padding: 15px;
    background: var(--bg-shortcuts);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: background var(--transition-duration) var(--transition-timing),
                color var(--transition-duration) var(--transition-timing);
    animation: fadeIn 0.6s var(--transition-timing) 0.5s both;
}

.shortcuts h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 14px;
    transition: color var(--transition-duration) var(--transition-timing);
}

.shortcuts ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.shortcuts li {
    padding: 5px 0;
    transition: transform 0.2s var(--transition-timing);
}

.shortcuts li:hover {
    transform: translateX(4px);
}

.shortcut-key {
    background: var(--button-hover);
    color: white;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 11px;
    transition: all 0.2s var(--transition-timing);
    display: inline-block;
}

.shortcuts li:hover .shortcut-key {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(222, 184, 135, 0.3);
}

.stats {
    margin-top: 15px;
    padding: 10px;
    background: var(--bg-stats);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-tertiary);
    transition: background var(--transition-duration) var(--transition-timing),
                color var(--transition-duration) var(--transition-timing);
    animation: fadeIn 0.6s var(--transition-timing) 0.4s both;
}

.stats span {
    transition: transform 0.3s var(--transition-timing);
}

.stats span:hover {
    transform: scale(1.05);
    display: inline-block;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 16px;
    background: var(--button-hover);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-duration) var(--transition-timing);
    box-shadow: 0 4px 12px var(--shadow-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle:hover {
    background: var(--button-active);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow-color);
}

.theme-toggle:active {
    transform: translateY(0);
}

#themeIcon {
    transition: transform 0.4s var(--transition-timing);
}

.theme-toggle:hover #themeIcon {
    transform: rotate(20deg) scale(1.1);
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 22px;
    }

    .logo {
        width: 40px;
        height: 40px;
    }

    .toolbar {
        gap: 8px;
    }

    .toolbar button {
        padding: 6px 10px;
        font-size: 12px;
    }

    .editor-container {
        min-height: 300px;
        padding: 15px;
    }

    #editor {
        min-height: 300px;
    }

    .shortcuts ul {
        grid-template-columns: 1fr;
    }
}