/* ==========================================================================
   FSM State Machine Generator - Stylesheet
   A clean, modern UI for the Boost.SML code generator
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #4f46e5;        /* Indigo */
    --color-primary-dark: #4338ca;
    --color-primary-light: #818cf8;
    --color-secondary: #059669;       /* Emerald */
    --color-secondary-dark: #047857;
    --color-danger: #dc2626;
    --color-danger-dark: #b91c1c;
    --color-warning: #f59e0b;
    
    /* Grays */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Semantic colors for table headers */
    --color-state: #1e293b;          /* Slate for states */
    --color-event: #1d4ed8;          /* Blue for events */
    --color-guard: #b91c1c;          /* Red for guards */
    --color-action: #047857;         /* Green for actions */
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-gray-200);
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    margin: 0;
    padding: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   Layout & Container
   -------------------------------------------------------------------------- */
#elm-app {
    max-width: 1100px;
    margin: 0 auto;
}

#elm-app > div {
    background: #1f2937;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-xl);
    color: var(--color-gray-200);
}

/* --------------------------------------------------------------------------
   Header Section
   -------------------------------------------------------------------------- */
h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-gray-100);
    margin: 0 0 var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

h1::before {
    content: "⚙️";
    font-size: 1.5rem;
}

.info-text {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xl);
    font-size: 0.95rem;
}

.info-text a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.info-text a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Machine Name Input Section
   -------------------------------------------------------------------------- */
#elm-app > div > div:first-child {
    background: var(--color-gray-800);
    border: 1px solid var(--color-gray-600);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-gray-200);
}

#elm-app > div > div:first-child::before {
    content: "🏷️";
    font-size: 1.25rem;
}

/* --------------------------------------------------------------------------
   Form Elements - Inputs
   -------------------------------------------------------------------------- */
input[type="text"] {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-gray-600);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--color-gray-700);
    color: var(--color-gray-100);
    width: 140px;
}

input[type="text"]:hover {
    border-color: var(--color-primary-light);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
    background: var(--color-gray-600);
}

input[type="text"]::placeholder {
    color: var(--color-gray-400);
    font-style: italic;
    opacity: 0.8;
}

input[type="text"]:disabled {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
    color: var(--color-gray-500);
    cursor: not-allowed;
}

/* Machine name input - make it wider */
#elm-app > div > div:first-child input[type="text"] {
    width: 250px;
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Form Elements - Select
   -------------------------------------------------------------------------- */
select {
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: var(--spacing-xl);
    border: 2px solid var(--color-gray-600);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-family: inherit;
    background: var(--color-gray-700) url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%239ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e") right 0.5rem center/1.25em no-repeat;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
    color: var(--color-gray-200);
}

select:hover {
    border-color: var(--color-primary-light);
}

select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

/* Primary button (default) */
button {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

button:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Add/Remove row buttons - make them smaller and styled differently */
#elm-app > div > table + button,
#elm-app > div > table + button + button {
    width: 36px;
    height: 36px;
    padding: 0;
    font-size: 1.25rem;
    border-radius: var(--radius-md);
}

/* Plus button - green */
#elm-app > div > table + button {
    background: var(--color-secondary);
}

#elm-app > div > table + button:hover {
    background: var(--color-secondary-dark);
}

/* Minus button - red */
#elm-app > div > table + button + button {
    background: var(--color-danger);
}

#elm-app > div > table + button + button:hover {
    background: var(--color-danger-dark);
}

/* Action buttons container - target the buttons after code blocks */
#elm-app > div > div.code-toolbar + div.code-toolbar + div + button,
#elm-app > div > div.code-toolbar + div.code-toolbar + div + button + button {
    margin-top: var(--spacing-lg);
}

/* Make UML Diagram button - secondary style */
button:nth-last-of-type(2) {
    background: var(--color-secondary);
}

button:nth-last-of-type(2):hover {
    background: var(--color-secondary-dark);
}

/* --------------------------------------------------------------------------
   Table Styles
   -------------------------------------------------------------------------- */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-lg) 0;
    background: var(--color-gray-800);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-600);
}

caption {
    caption-side: top;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-gray-200);
    padding: var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

caption::before {
    content: "📋";
}

/* Table header */
th {
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-gray-200);
}

/* Color-coded headers matching Main.elm */
th:nth-child(1),
th:nth-child(2) {
    background: var(--color-state) !important;
    color: white !important;
}

th:nth-child(3) {
    background: var(--color-event) !important;
    color: white !important;
}

th:nth-child(4) {
    background: var(--color-guard) !important;
    color: white !important;
}

th:nth-child(5) {
    background: var(--color-action) !important;
    color: white !important;
}

th:nth-child(6) {
    background: var(--color-gray-700) !important;
    color: var(--color-gray-200) !important;
}

/* Table cells */
td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-700);
    vertical-align: middle;
    color: var(--color-gray-200);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--color-gray-700);
}

/* Table inputs */
td input[type="text"] {
    width: 100%;
    border-color: transparent;
    background: transparent;
    color: var(--color-gray-100);
}

td input[type="text"]:hover {
    border-color: var(--color-gray-500);
    background: var(--color-gray-700);
}

td input[type="text"]:focus {
    border-color: var(--color-primary);
    background: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   Code Output Sections
   -------------------------------------------------------------------------- */
.code-toolbar {
    margin: var(--spacing-xl) 0;
    position: relative;
}

.code-toolbar::before {
    content: "Generated C++ Code";
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-xs);
}

.code-toolbar:nth-of-type(2)::before {
    content: "📨 Event Definitions";
}

.code-toolbar:first-of-type::before {
    content: "📄 State Machine Class";
}

pre {
    background: var(--color-gray-900) !important;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) !important;
    margin: 0;
    overflow: auto;
    box-shadow: var(--shadow-lg);
}

pre code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
}

/* Override prism styles for dark theme */
pre[class*="language-"] {
    background: var(--color-gray-900) !important;
}

code[class*="language-"] {
    text-shadow: none !important;
}

/* --------------------------------------------------------------------------
   Textarea (Main Content)
   -------------------------------------------------------------------------- */
textarea {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    border: 2px solid var(--color-gray-600);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    background: var(--color-gray-800);
    color: var(--color-gray-100);
    resize: vertical;
    transition: all var(--transition-fast);
    width: 100% !important;
    max-width: 100%;
    box-sizing: border-box;
}

textarea:hover {
    border-color: var(--color-primary-light);
}

textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
    background: var(--color-gray-700);
}

/* Add a label before textarea */
#elm-app > div > div:has(textarea)::before,
textarea::before {
    content: "✏️ Main Function (editable)";
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   PlantUML Diagram
   -------------------------------------------------------------------------- */
#plantuml-img {
    max-width: 100%;
    margin-top: var(--spacing-xl);
    border: 2px solid var(--color-gray-600);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: var(--color-gray-100);
    padding: var(--spacing-lg);
}

#plantuml-img:not([src=""]) {
    display: block;
}

/* --------------------------------------------------------------------------
   Button Group / Actions
   -------------------------------------------------------------------------- */
/* Style the action buttons at the bottom */
#elm-app > div > button:nth-last-of-type(1),
#elm-app > div > button:nth-last-of-type(2) {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 0.95rem;
    margin-top: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-md);
    }
    
    #elm-app > div {
        padding: var(--spacing-lg);
    }
    
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    input[type="text"] {
        width: 100px;
    }
    
    textarea {
        height: 150px !important;
    }
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#elm-app > div {
    animation: fadeIn 0.3s ease-out;
}

/* Row hover effect */
tr {
    transition: background var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Utility Classes (can be added via Elm)
   -------------------------------------------------------------------------- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.flex {
    display: flex;
}

.gap-md {
    gap: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    body {
        background: white;
        padding: 0;
    }
    
    #elm-app > div {
        box-shadow: none;
    }
    
    button {
        display: none;
    }
    
    pre {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}