:root {
    --primary: #22C55E;
    --secondary: #4ADE80;
    --accent: #A78BFA;
    --bg-main: #0A120D;
    --bg-panel: rgba(16, 28, 20, 0.7);
    --bg-input: rgba(10, 18, 13, 0.8);
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --border-color: rgba(34, 197, 94, 0.2);
    --border-focus: rgba(74, 222, 128, 0.5);
    --success-glow: rgba(34, 197, 94, 0.15);
    --radius: 12px;
    --font-sans: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    background-image:
        radial-gradient(circle at top right, var(--success-glow) 0%, transparent 40%),
        radial-gradient(circle at bottom left, rgba(167, 139, 250, 0.1) 0%, transparent 40%);
}

.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.input-sidebar {
    width: 400px;
    min-width: 350px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    padding: 2rem;
    z-index: 10;
}

.app-header {
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.logo-icon {
    filter: drop-shadow(0 0 8px rgba(34, 197, 94, 0.4));
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.flex-fill {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

label code {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--secondary);
    text-transform: none;
}

.custom-select,
textarea {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

textarea {
    flex-grow: 1;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    resize: none;
    line-height: 1.6;
}

.custom-select:focus,
textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.1);
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: color 0.2s;
}

.text-btn:hover {
    color: var(--text-main);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-main);
    border: none;
    border-radius: var(--radius);
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.2);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.3);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Main Output Area */
.output-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: rgba(10, 18, 13, 0.4);
}

.empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
}

.empty-state.active {
    display: flex;
    animation: fadeIn 0.5s ease;
}

.empty-icon {
    color: var(--primary);
    opacity: 0.5;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(34, 197, 94, 0.3));
}

.empty-state h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.result-state {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 2rem;
    animation: slideUp 0.4s ease;
}

.result-state.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.action-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.tags-container {
    display: flex;
    gap: 0.5rem;
}

.tag {
    background: rgba(167, 139, 250, 0.15);
    color: var(--accent);
    border: 1px solid rgba(167, 139, 250, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    font-weight: 500;
}

.tag.feat {
    color: var(--secondary);
    background: rgba(74, 222, 128, 0.15);
    border-color: rgba(74, 222, 128, 0.3);
}

.tag.fix {
    color: #F43F5E;
    background: rgba(244, 63, 94, 0.15);
    border-color: rgba(244, 63, 94, 0.3);
}

.secondary-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.secondary-btn:hover {
    background: rgba(34, 197, 94, 0.1);
    border-color: var(--primary);
}

.editor-container {
    flex-grow: 1;
    display: flex;
    background: var(--bg-input);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.markdown-editor {
    flex-grow: 1;
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
    color: #E2E8F0;
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
}

.markdown-editor:focus {
    outline: none;
    box-shadow: inset 0 0 0 1px var(--primary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--text-main);
    color: var(--bg-main);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}