/* ============================================
   CSS Reset & Base Styles
   ============================================ */

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

:root {
    /* Light Mode Colors */
    --bg-primary: #ededed;
    --bg-secondary: #e1e1e1;
    --bg-code: #f5f5f5;
    --text-primary: #212121;
    --text-secondary: #595959;
    --border-color: #cacaca;
    --shadow: rgba(0, 0, 0, 0.1);

    /* Accent Colors */
    --accent-primary: #006695;
    --accent-hover: #0077b3;
    --accent-light: #eaeaea;

    /* Success */
    --success: #10b981;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #2a2a2a;
        --bg-secondary: #232323;
        --bg-code: #2e2e2e;
        /* ALTERNATIVE BLUE-ISH */
        /* --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-code: #1e293b; */
        --text-primary: #e7e7e7;
        --text-secondary: #b6bec9;
        --border-color: #334155;
        --shadow: rgba(0, 0, 0, 0.3);
        --accent-primary: #0ea0e4;
        --accent-light: #393f47;
    }
}


/* ============================================
   Typography
   ============================================ */

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--accent-primary);
    display: inline-block;
}

h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* ============================================
   Base Elements
   ============================================ */
code {
    font-family: var(--font-mono);
    background-color: var(--bg-code);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
    border: 1px solid var(--border-color);
}

kbd {
    font-family: var(--font-mono);
    background-color: var(--bg-code);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 2px var(--shadow);
}

details {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--accent-primary);
    user-select: none;
    padding: var(--spacing-xs);
    margin: calc(-1 * var(--spacing-xs));
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

summary:hover {
    background-color: var(--accent-light);
}

details[open] summary {
    margin-bottom: var(--spacing-md);
}

hr {
    border-color: var(--accent-primary);
}

/* ============================================
   Lists
   ============================================ */

.arrow-list {
    list-style: none;
    padding-left: 0;
}

.arrow-list li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    position: relative;
    color: var(--text-secondary);
}

.arrow-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* ============================================
   Layout
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* ============================================
   Content Sections
   ============================================ */

.content-section {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
    box-shadow: 0 2px 8px var(--shadow);
}

/* ============================================
   Grid Layout
   ============================================ */

.grid-2col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-primary);
    line-height: 1;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    line-height: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover {
    background-color: var(--accent-light);
    color: var(--accent-primary);
    text-decoration: none;
}

.logo-icon,
.nav-link svg {
    display: block;
}

.nav-link svg {
    transition: scale 0.5s ease;
}

.nav-link:hover svg {
    transform: scale(1.05);
}

.lang-switch {
    font-weight: 600;
    border: 1px solid var(--border-color);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    /* text-align: center; */
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* ============================================
   Code Block / Tool
   ============================================ */

.tool-section {
    margin-top: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    box-shadow: 1px 1px 10px 3px rgba(30, 123, 162, 0.6);
}

.code-block {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 4px var(--shadow);
}

.code-header {
    background-color: var(--bg-primary);
    filter: brightness(0.9);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.code-lang {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.code-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.code-copy {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background-color: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.2;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
    min-width: 130px;
    justify-content: center;
}

.code-copy:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.code-copy:active {
    transform: translateY(0);
}

.code-copy.copied {
    background-color: var(--success);
}

.escape-btn,
.unescape-btn {
    background-color: #006aa7;
}

.escape-btn:hover,
.unescape-btn:hover {
    background-color: #005a8e;
}

.copy-btn {
    background-color: #00874f;
}

.copy-btn:hover {
    background-color: #007343;
}

.clear-btn {
    background-color: #e12828;
}

.clear-btn:hover {
    background-color: #bc2525;
}

.copy-icon {
    display: flex;
    align-items: center;
}

.copy-icon img {
    filter: brightness(0) invert(1);
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    .copy-icon img {
        filter: none;
        opacity: 0.9;
    }
}

/* ============================================
   Textareas
   ============================================ */

.code-input,
.code-output {
    width: 100%;
    min-height: 200px;
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    resize: vertical;
    outline: none;
    white-space: pre;
    overflow-x: auto;
    word-wrap: normal;
}

.code-input {
    border-bottom: 1px solid var(--border-color);
}

.code-input::placeholder,
.code-output::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.code-input:focus {
    background-color: var(--bg-primary);
}

.code-output {
    background-color: var(--bg-code);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background-color: var(--bg-secondary);
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.footer a {
    color: var(--accent-primary);
    font-weight: 500;
}

.footer small {
    display: block;
    margin-top: 0.5rem;
    opacity: 0.9;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {

    /* Typography */
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    /* Layout */
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    /* Nav */
    .nav-container {
        padding: 0.75rem 1rem;
    }

    .logo-text {
        font-size: 1rem;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .nav-link span {
        display: none;
    }

    /* Tool */
    .code-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .code-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xs);
    }

    .code-copy {
        justify-content: center;
        padding: 0.5rem 0.5rem;
        font-size: 0.8rem;
    }

    /* Stack buttons */
    .normalize-btn,
    .escape-btn,
    .copy-btn,
    .clear-btn {
        grid-column: span 1;
    }

    .lang-switch span {
        display: inline;
    }
}

@media (max-width: 420px) {

    .logo-text {
        display: none;
    }

    .code-actions {
        grid-template-columns: 1fr;
    }

}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.content-section {
    animation: fadeIn 0.5s ease-out;
}