/* --- CSS Variables --- */
:root {
    --light-bg: #f4f7f6; /* Lighter grey */
    --light-text: #333333;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --border-color: #e0e0e0;
    --accent-color: #007bff; /* A nice blue */
    --accent-hover: #0056b3;
    --icon-color: var(--accent-color);
    --transition: all 0.3s ease-in-out;

    /* Dark mode variables get overridden by .dark-mode class */
    --dark-bg: #1a1a1a;
    --dark-text: #e9ecef;
    --dark-card-bg: #2c2c2c;
    --dark-card-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    --dark-border-color: #444444;
}

/* --- Base Styling (from user, with adjustments) --- */
body {
    font-family: 'Exo 2', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--light-text);
    background-color: var(--light-bg);
    margin: 0;
    padding: 0;
    padding-bottom: 70px; /* Space for footer */
    transition: background-color var(--transition), color var(--transition);
}

/* --- Dark Mode Base Styles (from user, with additions) --- */
.dark-mode {
    --light-bg: var(--dark-bg); /* Override light vars with dark values */
    --light-text: var(--dark-text);
    --card-bg: var(--dark-card-bg);
    --card-shadow: var(--dark-card-shadow);
    --border-color: var(--dark-border-color);
    --icon-color: #6caff5; /* Lighter blue for dark mode icons */
}

/* Apply dark mode styles to body when .dark-mode is present */
.dark-mode body { /* This selector is redundant if vars are used correctly. Keep for direct property overrides if needed. */
    background-color: var(--light-bg); /* Uses the overridden --light-bg from .dark-mode */
    color: var(--light-text);      /* Uses the overridden --light-text from .dark-mode */
}

/* --- Dark Mode Toggle Styles (from user + additions for the switch) --- */
.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    z-index: 1000;
}

.dark-mode-toggle .mode-icon {
    font-size: 1.2em;
    margin: 0 8px;
    color: var(--light-text); /* Use text color variable */
    transition: color var(--transition);
}

/* Switch styles */
.switch {
    position: relative;
    display: inline-block;
    width: 50px; /* Adjusted width */
    height: 26px; /* Adjusted height */
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 26px; /* Keep it rounded */
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px; /* Smaller circle */
    width: 20px;  /* Smaller circle */
    left: 3px;   /* Adjust position */
    bottom: 3px; /* Adjust position */
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

.dark-mode input:checked + .slider {
    background-color: var(--icon-color); /* Consistent with dark mode accent */
}

input:checked + .slider:before {
    transform: translateX(24px); /* Adjust translation */
}

/* --- Header --- */
header {
    background-color: var(--card-bg);
    color: var(--light-text);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition);
    margin-bottom: 40px;
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 2.5em;
    font-weight: 600;
}

header p {
    margin: 0;
    font-size: 1.1em;
    color: #555; /* Slightly dimmer than main text */
}
.dark-mode header p {
    color: #aaa;
}


/* --- Tool Grid --- */
.tool-grid-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

/* --- Tool Card --- */
.tool-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    box-shadow: var(--card-shadow);
    text-decoration: none;
    color: var(--light-text);
    display: flex;
    flex-direction: column; /* Changed to column for better icon + text layout */
    align-items: center; /* Center content */
    text-align: center; /* Center text */
    transition: var(--transition), transform 0.2s ease-out, box-shadow 0.2s ease-out;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}
.dark-mode .tool-card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
}


.tool-card.placeholder {
    border: 2px dashed var(--border-color);
    background-color: transparent;
    box-shadow: none;
    opacity: 0.7;
    cursor: default;
}
.dark-mode .tool-card.placeholder {
    border-color: var(--dark-border-color);
}
.tool-card.placeholder:hover {
    transform: none;
    box-shadow: none;
}


.tool-icon {
    font-size: 2.8em; /* Larger icon */
    color: var(--icon-color);
    margin-bottom: 20px; /* Space between icon and text */
    width: 80px; /* Fixed width for icon container */
    height: 80px; /* Fixed height for icon container */
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 123, 255, 0.1); /* Light accent background */
    border-radius: 50%;
    transition: background-color var(--transition);
}
.dark-mode .tool-icon {
    background-color: rgba(108, 175, 245, 0.15); /* Dark mode accent background */
}
.tool-card.placeholder .tool-icon {
    color: var(--light-text); /* Neutral color for placeholder */
    background-color: transparent;
}


.tool-content h3 {
    font-size: 1.5em;
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--light-text); /* Ensure heading color respects dark mode */
}

.tool-content p {
    font-size: 0.95em;
    line-height: 1.5;
    margin-bottom: 0;
    color: #555; /* Slightly dimmer for description */
}
.dark-mode .tool-content p {
    color: #bbb;
}

/* --- Footer --- */
footer {
    background-color: #333; /* Darker footer */
    color: #f0f0f0;
    text-align: center;
    padding: 20px;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    font-size: 0.9em;
    border-top: 1px solid #444;
}
.dark-mode footer {
    background-color: #111; /* Even darker for dark mode */
    border-top: 1px solid #222;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    header p {
        font-size: 1em;
    }
    .tool-grid {
        grid-template-columns: 1fr; /* Stack cards on smaller screens */
    }
    .dark-mode-toggle {
        top: 10px;
        right: 10px;
    }
}