/* Theme Variables */
:root {
    --bg-color: #f4f7f6;
    --text-color: #333;
    --header-color: #2c3e50;
    --subtext-color: #667;
    --card-bg: white;
    --card-shadow: rgba(0, 0, 0, 0.07);
    --card-hover-shadow: rgba(0, 0, 0, 0.12);
    --button-bg: #5c67f2;
    --button-hover: #4a54f1;
    --controls-bg: #e9edf0;
    --border-color: #d1d9e0;
    --active-card-bg: #e6e9fc;
    --active-card-border: #5c67f2;
    --logo-filter: none; /* No filter for light mode */
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --header-color: #ffffff;
    --subtext-color: #a0a0a0;
    --card-bg: #1e1e1e;
    --card-shadow: rgba(0, 0, 0, 0.4);
    --card-hover-shadow: rgba(0, 0, 0, 0.6);
    --button-bg: #7b8aff;
    --button-hover: #939dff;
    --controls-bg: #2a2a2a;
    --border-color: #3a3a3a;
    --active-card-bg: #2c2c3a;
    --active-card-border: #7b8aff;
    --logo-filter: invert(1) brightness(1.5); /* Invert and brighten logo for dark mode */
}

/* Code Protection */
body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Only allow selection in the textarea */
textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1100px; /* Slightly narrower */
    margin: 0 auto;
    padding: 2rem 1rem; /* Adjusted padding */
}

/* Header Styles */
header {
    display: flex; /* Use flexbox */
    align-items: center; /* Align items vertically */
    justify-content: space-between; /* Space out elements */
    margin-bottom: 3rem; /* Increased margin */
    position: relative;
}

.logo-container {
    flex-shrink: 0; /* Prevent logo from shrinking */
    margin-right: 1.5rem;
}

#logo {
    height: 0px; /* Increased logo size significantly */
    width: auto;
    display: block;
    filter: var(--logo-filter); /* Apply theme-based filter */
    transition: filter 0.3s ease;
}

.header-content {
    flex-grow: 1; /* Allow text content to grow */
    text-align: left; /* Align text left */
}

header h1 {
    font-size: 2.2rem; /* Slightly smaller */
    color: var(--header-color);
    margin-bottom: 0.2rem; /* Reduced margin */
    font-weight: 600;
}

header p {
    font-size: 1rem;
    color: var(--subtext-color);
}

/* Theme Toggle */
.theme-toggle {
    /* Position is handled by header flexbox */
}

#theme-toggle-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--subtext-color);
    font-size: 1.2rem; /* Adjusted size */
    cursor: pointer;
    padding: 0.5rem 0.6rem; /* Adjusted padding */
    border-radius: 50%; /* Make it round */
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-toggle-btn:hover {
    transform: none; /* Remove previous rotation */
    background-color: var(--controls-bg);
    color: var(--header-color);
}

/* Main Content Styles */
main {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Text Area Styles */
.text-area-container {
    background-color: var(--card-bg);
    border-radius: 12px; /* Increased radius */
    box-shadow: 0 5px 15px var(--card-shadow);
    overflow: hidden;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

textarea {
    width: 100%;
    min-height: 250px; /* Increased height */
    padding: 1.5rem; /* Increased padding */
    border: none;
    resize: vertical;
    font-size: 1.1rem; /* Slightly larger font */
    font-family: inherit;
    outline: none;
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

.text-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem; /* Increased padding */
    background-color: var(--controls-bg);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.word-count {
    font-size: 0.9rem;
    color: var(--subtext-color);
}

.buttons {
    display: flex;
    gap: 0.75rem; /* Increased gap */
}

button {
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 8px; /* Increased radius */
    padding: 0.6rem 1.2rem; /* Adjusted padding */
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:hover {
    background-color: var(--button-hover);
}

button:active {
    transform: scale(0.98);
}

#clear-button {
    background-color: transparent;
    color: var(--subtext-color);
    border: 1px solid var(--border-color);
}

#clear-button:hover {
    background-color: var(--controls-bg);
    color: var(--header-color);
}

#copy-button {
    /* Keep primary button style */
}

button i {
    font-size: 0.9rem;
}

/* Conversion Options Styles */
.conversion-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); /* Adjusted minmax */
    gap: 1.25rem; /* Increased gap */
}

.option-card {
    background-color: var(--card-bg);
    border-radius: 12px; /* Increased radius */
    box-shadow: 0 4px 10px var(--card-shadow);
    padding: 1.5rem; /* Increased padding */
    cursor: pointer;
    border: 2px solid transparent; /* Prepare for active state */
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.3s ease;
}

.option-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--card-hover-shadow);
}

.option-card h3 {
    margin-bottom: 0.6rem;
    color: var(--header-color);
    font-size: 1.1rem;
    font-weight: 600;
}

.option-card p {
    font-size: 0.9rem;
    color: var(--subtext-color);
}

/* Footer Styles */
footer {
    margin-top: 4rem; /* Increased margin */
    text-align: center;
    color: var(--subtext-color);
    font-size: 0.9rem;
}

footer a {
    color: var(--button-bg);
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
}

footer i {
    color: var(--subtext-color); /* Match footer text */
    margin-left: 0.25rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start; /* Align left on mobile */
        gap: 1rem;
    }
    .logo-container {
        margin-right: 0;
    }
    .theme-toggle {
        position: absolute;
        top: 1rem; /* Position toggle top right */
        right: 1rem;
    }
    .container {
        padding: 1.5rem 1rem;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .conversion-options {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
    textarea {
        min-height: 200px;
    }
}

/* Active State for Option Cards */
.option-card.active {
    border: 2px solid var(--active-card-border);
    background-color: var(--active-card-bg);
}