@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css'); /* Ensure Font Awesome is loaded */

/* --- CSS Variables --- */
:root {
    --font-family: 'Poppins', sans-serif;
    --transition-speed: 0.25s;
    --border-radius-lg: 16px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;

    /* Light Theme */
    --bg-gradient-light: linear-gradient(120deg, #e0c3fc 0%, #8ec5fc 100%); /* Example: Soft violet/blue */
    --bg-color-light: #f8f9fc;
    --card-bg-light: #ffffff;
    --card-bg-secondary-light: #f9faff; /* Slightly off-white */
    --text-color-light: #2d3748; /* Dark gray */
    --text-color-secondary-light: #718096; /* Medium gray */
    --border-color-light: #e2e8f0;
    --accent-color-light: #667eea; /* Indigo */
    --accent-color-hover-light: #5a67d8;
    --accent-text-color-light: #ffffff;
    --success-color-light: #38a169; /* Green */
    --error-color-light: #e53e3e; /* Red */
    --shadow-color-light: rgba(113, 128, 150, 0.15);
     --accent-color-end-transparent-light: rgba(102, 126, 234, 0.3); /* Focus ring */
     --accent-text-color-transparent-light: rgba(255, 255, 255, 0.3); /* Spinner track */


    /* Dark Theme */
    --bg-gradient-dark: linear-gradient(120deg, #1A202C 0%, #2D3748 100%); /* Dark gray gradient */
    --bg-color-dark: #171923; /* Very dark */
    --card-bg-dark: #2d3748; /* Dark gray */
    --card-bg-secondary-dark: #1a202c; /* Near black */
    --text-color-dark: #e2e8f0; /* Light gray */
    --text-color-secondary-dark: #a0aec0; /* Medium light gray */
    --border-color-dark: #4a5568;
    --accent-color-dark: #7f9cf5; /* Lighter indigo */
    --accent-color-hover-dark: #9faef7;
    --accent-text-color-dark: #1a202c; /* Dark text on light accent */
    --success-color-dark: #48bb78; /* Brighter green */
    --error-color-dark: #f56565; /* Brighter red */
    --shadow-color-dark: rgba(0, 0, 0, 0.3);
     --accent-color-end-transparent-dark: rgba(127, 156, 245, 0.4); /* Focus ring */
     --accent-text-color-transparent-dark: rgba(26, 32, 44, 0.5); /* Spinner track */


    /* Initial theme (overridden by JS) */
    --bg-gradient: var(--bg-gradient-light);
    --bg-color: var(--bg-color-light);
    --card-bg: var(--card-bg-light);
    --card-bg-secondary: var(--card-bg-secondary-light);
    --text-color: var(--text-color-light);
    --text-color-secondary: var(--text-color-secondary-light);
    --border-color: var(--border-color-light);
    --accent-color: var(--accent-color-light);
    --accent-color-hover: var(--accent-color-hover-light);
    --accent-text-color: var(--accent-text-color-light);
    --success-color: var(--success-color-light);
    --error-color: var(--error-color-light);
    --shadow-color: var(--shadow-color-light);
     --accent-color-end-transparent: var(--accent-color-end-transparent-light);
     --accent-text-color-transparent: var(--accent-text-color-transparent-light);

}

body.dark-mode {
    --bg-gradient: var(--bg-gradient-dark);
    --bg-color: var(--bg-color-dark);
    --card-bg: var(--card-bg-dark);
    --card-bg-secondary: var(--card-bg-secondary-dark);
    --text-color: var(--text-color-dark);
    --text-color-secondary: var(--text-color-secondary-dark);
    --border-color: var(--border-color-dark);
    --accent-color: var(--accent-color-dark);
    --accent-color-hover: var(--accent-color-hover-dark);
    --accent-text-color: var(--accent-text-color-dark);
    --success-color: var(--success-color-dark);
    --error-color: var(--error-color-dark);
    --shadow-color: var(--shadow-color-dark);
     --accent-color-end-transparent: var(--accent-color-end-transparent-dark);
     --accent-text-color-transparent: var(--accent-text-color-transparent-dark);
}

/* --- Base & Background --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: var(--bg-gradient); /* Subtle gradient background */
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 50px 20px;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Optional background pattern */
.background-pattern {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    /* Example using SVG - replace with your own or remove */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.05'%3E%3Cpath d='M0 38.59l2.83-2.83 1.41 1.41L1.41 40H0v-1.41zM10 40h1.41l-1.41-1.41L10 37.17V40zm10 0h1.41l-1.41-1.41L20 37.17V40zm10 0h1.41l-1.41-1.41L30 37.17V40zm10 0h1.41l-1.41-1.41L40 37.17V40zM40 10h-1.41l1.41 1.41L40 12.83V10zM30 0h-1.41l1.41 1.41L30 2.83V0zM20 0h-1.41l1.41 1.41L20 2.83V0zM10 0h-1.41l1.41 1.41L10 2.83V0zM0 0h1.41L0 1.41V0z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    z-index: -1;
    opacity: 0.6;
    transition: opacity var(--transition-speed) ease;
}
body.dark-mode .background-pattern { opacity: 0.4; }


/* --- Main Container Card --- */
.container {
    background-color: var(--card-bg);
    padding: 30px 35px;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 30px -10px var(--shadow-color);
    max-width: 900px; /* Wider container */
    width: 100%;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    border: 1px solid var(--border-color);
}

/* --- Header --- */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h1 {
    font-size: 1.6rem; /* 25.6px */
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

/* --- Theme Switch (Slider) --- */
.theme-switch {
  position: relative;
  display: inline-block;
  width: 54px; /* Width */
  height: 28px; /* Height */
}
.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--card-bg-secondary);
  border: 1px solid var(--border-color);
  transition: var(--transition-speed);
  border-radius: 28px; /* Height */
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px;
}
.slider:before { /* The circle */
  position: absolute;
  content: "";
  height: 20px; /* Circle size */
  width: 20px;
  left: 3px; /* Initial position */
  bottom: 3px;
  background-color: var(--accent-color);
  transition: var(--transition-speed);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.slider i { /* Icons inside slider */
    font-size: 0.8rem;
    color: var(--text-color-secondary);
    z-index: 1; /* Above the :before circle */
    transition: color var(--transition-speed), opacity var(--transition-speed);
}
.slider .icon-sun { margin-right: 2px; opacity: 0;}
.slider .icon-moon { margin-left: 2px; opacity: 1;}

/* Checked state (Dark mode) */
input:checked + .slider {
  background-color: var(--card-bg-secondary); /* Same bg */
}
input:checked + .slider:before {
  transform: translateX(26px); /* Move circle */
  background-color: var(--accent-color);
}
/* Hide/show icons based on state */
input:not(:checked) + .slider .icon-sun { opacity: 0; }
input:checked + .slider .icon-moon { opacity: 0; }
input:checked + .slider .icon-sun { opacity: 1; }


/* Focus state */
input:focus + .slider {
  box-shadow: 0 0 0 2px var(--accent-color-end-transparent);
}


/* --- Main Content Grid --- */
.main-grid {
    display: grid;
    grid-template-columns: 1fr; /* Default: single column */
    gap: 30px; /* Space between columns/rows */
}

@media (min-width: 768px) { /* Two columns on medium screens and up */
    .main-grid {
        grid-template-columns: 2fr 1fr; /* Adjust ratio as needed (e.g., 3fr 1fr) */
        align-items: start; /* Align items to the top of their grid cell */
    }
}

.grid-column h2 { /* Heading for options column */
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-color);
}

/* --- Upload Area --- */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 30px 25px; /* Reduced padding */
    background-color: var(--card-bg-secondary);
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    text-align: center;
    position: relative; /* For potential overlays */
    overflow: hidden; /* Hide potential overflow effects */
}

.upload-area.drag-over {
    border-color: var(--accent-color);
    background-color: var(--card-bg); /* Use main card bg */
    border-style: solid;
    box-shadow: inset 0 0 15px 0 rgba(0,0,0,0.05);
}
body.dark-mode .upload-area.drag-over {
     box-shadow: inset 0 0 15px 0 rgba(255,255,255,0.03);
}


.upload-area-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-color-secondary);
}

.upload-icon-svg {
    width: 60px;
    height: 60px;
    fill: var(--accent-color);
    margin-bottom: 15px;
    transition: transform var(--transition-speed) ease;
}
.upload-area:hover .upload-icon-svg {
    transform: scale(1.08);
}
.upload-area.drag-over .upload-icon-svg {
    animation: pulse 1.5s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}


.upload-prompt {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 5px;
}
.browse-link {
    color: var(--accent-color);
    text-decoration: underline;
    cursor: pointer;
    font-weight: 600;
}
.upload-hint {
    font-size: 0.85rem;
    color: var(--text-color-secondary);
    margin-bottom: 15px;
}

.file-name-display {
    font-weight: 500;
    color: var(--accent-color-hover);
    font-size: 0.9rem;
    word-break: break-all;
    min-height: 1.2em;
    margin-top: 10px;
    background-color: var(--bg-color);
    padding: 5px 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    display: inline-block; /* Only take width of content */
    max-width: 90%; /* Prevent excessive width */
    opacity: 0; /* Hidden initially */
    transition: opacity var(--transition-speed) ease;
}
/* Show filename when file input is valid (has a file selected) */
/* This requires the <input> to be BEFORE the element to show */
/* Our HTML structure changed, so this CSS rule might not work. JS handles showing it now. */
/* #file-input:valid + .upload-area-content #file-name-display { opacity: 1; } */


/* --- Options Area --- */
.options-area {
    background-color: transparent; /* Remove distinct background */
    border: none;
    padding: 0;
    margin-bottom: 20px; /* Space before convert button */
}
.options-area label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.9rem;
}
.options-area > div:not(:last-child) { /* Add space below each option group */
    margin-bottom: 18px;
}

/* Inputs styling */
.format-select,
#quality-slider {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: 0.95rem;
    background-color: var(--card-bg-secondary);
    color: var(--text-color);
    transition: all var(--transition-speed) ease;
}
.format-select { margin-bottom: 0; } /* Remove extra space below select */

.format-select:focus,
#quality-slider:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-color-end-transparent);
    background-color: var(--card-bg); /* Slightly change bg on focus */
}
/* Slider specific layout */
#quality-option { margin-top: 0; } /* Remove top margin as it's inside the spaced divs */
.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
}
#quality-slider {
    flex-grow: 1;
    padding: 0;
    height: 8px;
    cursor: pointer;
    background: var(--border-color); /* Use border color for track */
    border-radius: 4px;
    appearance: none;
    -webkit-appearance: none;
    outline-offset: 3px; /* For focus visibility */
}
/* Slider thumb */
#quality-slider::-webkit-slider-thumb {
    appearance: none; -webkit-appearance: none;
    width: 18px; height: 18px;
    background: var(--accent-color);
    border-radius: 50%; cursor: pointer; border: none;
    box-shadow: 0 1px 3px var(--shadow-color);
    transition: background-color var(--transition-speed) ease;
}
#quality-slider::-moz-range-thumb {
    width: 18px; height: 18px;
    background: var(--accent-color);
    border-radius: 50%; cursor: pointer; border: none;
    box-shadow: 0 1px 3px var(--shadow-color);
    transition: background-color var(--transition-speed) ease;
}
.quality-value-display {
    font-weight: 500;
    color: var(--text-color-secondary);
    font-size: 0.85rem;
    min-width: 35px;
    text-align: right;
    background-color: var(--card-bg-secondary);
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}


/* --- Convert Button --- */
.convert-btn {
    background: var(--accent-color);
    color: var(--accent-text-color);
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 10px -2px var(--shadow-color);
    border-radius: var(--border-radius-sm);
    position: relative;
    overflow: hidden;
    margin-top: 10px; /* Space above button */
    border: none; /* Ensure no default border */
}
.convert-btn:hover {
    background: var(--accent-color-hover);
    box-shadow: 0 6px 15px -3px var(--shadow-color);
    transform: translateY(-2px);
}
.convert-btn:active {
     transform: translateY(0);
     box-shadow: 0 4px 10px -2px var(--shadow-color);
}

/* Spinner */
.convert-btn .spinner {
    border: 3px solid var(--accent-text-color-transparent);
    border-top-color: var(--accent-text-color);
    width: 18px; height: 18px;
    /* Rest is same */
    display: inline-block; border-radius: 50%; animation: spin 1s linear infinite; vertical-align: middle; margin-left: 8px;
}
.convert-btn:not(.loading) .spinner { display: none; }
.convert-btn.loading .btn-text { display: none; }
.convert-btn.loading .spinner { display: inline-block; }
.convert-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--text-color-secondary);
    box-shadow: none;
    transform: none;
}
@keyframes spin { to { transform: rotate(360deg); } }


/* --- Result Area (on index.php - only for errors now) & Messages --- */
.result-area {
    margin-top: 20px; /* Space above result when shown */
    padding: 0;
    transition: all 0.4s ease-out; /* Slower transition */
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    /* Remove border/background - handled by message */
}
.result-area.show {
    opacity: 1;
    max-height: 500px;
}
/* Message Styling */
.message {
    margin-bottom: 0; /* No margin needed if it's the only thing in result-area */
    font-weight: 500;
    font-size: 0.9rem; /* 14.4px */
    padding: 12px 15px;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent; /* Base border */
    display: flex; /* Align icon and text */
    align-items: center;
    background-color: var(--card-bg-secondary); /* Use secondary bg */
    box-shadow: var(--shadow-sm);
    color: var(--text-color); /* Default text color */
}
.message::before { /* Icon */
    font-family: "Font Awesome 6 Free"; font-weight: 900;
    margin-right: 10px; font-size: 1.1em;
}
.message.success { /* Style exists, but success message shown on result.php */
    color: var(--success-color);
    border-left: 4px solid var(--success-color); /* Use left border accent */
}
.message.success::before { content: "\f058"; }
.message.error {
    color: var(--error-color);
    border-left: 4px solid var(--error-color);
}
.message.error::before { content: "\f071"; }

/* Download Button (Style exists, but button is on result.php) */
.download-btn {
    /* Style rules kept for consistency if needed elsewhere, but button itself moved */
    background-color: var(--success-color);
    color: #fff;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    width: 100%;
    margin-top: 0;
    /* ... other download button styles ... */
}


/* --- Recommended Tools Section --- */
.recommended-tools {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 1px solid var(--border-color);
    text-align: left;
    transition: border-color var(--transition-speed) ease;
}
.recommended-tools h2 {
    font-size: 1.1rem; /* Smaller heading */
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 15px;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); /* Smaller min width */
    gap: 12px;
}
.tool-card {
    background-color: var(--card-bg-secondary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    padding: 12px; /* Reduced padding */
    display: flex;
    align-items: center;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    box-shadow: none;
    overflow: hidden; /* Hide overflow for potential hover effects */
}
.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
    background-color: var(--card-bg);
}
.tool-card-icon-wrapper {
    display: inline-flex; /* Use inline-flex to size naturally */
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    /* REMOVED width: 36px; */
    /* REMOVED height: 36px; */
    padding: 6px 8px; /* Adjusted padding (more horizontal) */
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-color);
    flex-shrink: 0; /* Keep this */
    transition: background-color var(--transition-speed) ease;
}
/* Icon Styles */
.tool-card-icon-wrapper i, .tool-card-icon-wrapper .icon-text { font-size: 1rem; color: var(--icon-color, #94a3b8); line-height: 1; }
.tool-card-icon-wrapper .icon-arrow { font-size: 0.75rem; margin: 0 6px; }
.tool-card-icon-wrapper .icon-text { font-weight: 500; font-size: 0.8rem; padding: 1px 5px; border-radius: 3px; background-color: var(--card-bg-secondary); color: var(--text-color-secondary); }

/* --- Specific Icon Colors --- */
.tool-card-icon-wrapper.pdf .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.pdf .icon-to { color: #ef4444; } /* Red */
.tool-card-icon-wrapper.jpg-png .icon-from { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.jpg-png .icon-to { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.png-jpg .icon-from { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.png-jpg .icon-to { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.webp-jpg .icon-from { color: #22c55e; } /* Green */
.tool-card-icon-wrapper.webp-jpg .icon-to { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.img-svg .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.img-svg .icon-to { color: #ff9f1c; } /* Orange */
.tool-card-icon-wrapper.img-ico .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.img-ico .icon-to { color: #f39c12; } /* Amber */
.tool-card-icon-wrapper.img-gif .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.img-gif .icon-to { color: #9b59b6; } /* Purple */
.tool-card-icon-wrapper.img-tiff .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.img-tiff .icon-to { color: #34495e; } /* Dark Gray */
.tool-card-icon-wrapper.img-webp .icon-from,
.tool-card-icon-wrapper.img-avif .icon-from,
.tool-card-icon-wrapper.img-bmp .icon-from { color: var(--accent-color); }
.tool-card-icon-wrapper.img-webp .icon-to { color: #22c55e; } /* Green */
.tool-card-icon-wrapper.img-avif .icon-to { color: #8b5cf6; } /* Violet */
.tool-card-icon-wrapper.img-bmp .icon-to { color: #64748b; } /* Slate Gray */
.tool-card-icon-wrapper.heic-jpg .icon-from,
.tool-card-icon-wrapper.heic-png .icon-from { color: #a855f7; } /* Purple for HEIC */
.tool-card-icon-wrapper.heic-jpg .icon-to { color: #f59e0b; } /* Amber for JPG */
.tool-card-icon-wrapper.heic-png .icon-to { color: #3b82f6; } /* Blue for PNG */
.tool-card-icon-wrapper.svg-png .icon-from,
.tool-card-icon-wrapper.svg-jpg .icon-from { color: #ff9f1c; } /* Orange for SVG */
.tool-card-icon-wrapper.svg-png .icon-to { color: #3b82f6; } /* Blue for PNG */
.tool-card-icon-wrapper.svg-jpg .icon-to { color: #f59e0b; } /* Amber for JPG */
.tool-card-icon-wrapper.pdf-jpg .icon-from,
.tool-card-icon-wrapper.pdf-png .icon-from { color: #ef4444; } /* Red for PDF */
.tool-card-icon-wrapper.pdf-jpg .icon-to { color: #f59e0b; } /* Amber for JPG */
.tool-card-icon-wrapper.pdf-png .icon-to { color: #3b82f6; } /* Blue for PNG */
.tool-card-icon-wrapper.png-ico .icon-from { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.jpg-ico .icon-from { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.png-ico .icon-to,
.tool-card-icon-wrapper.jpg-ico .icon-to { color: #f39c12; } /* Amber */
.tool-card-icon-wrapper.gif-png .icon-from,
.tool-card-icon-wrapper.gif-jpg .icon-from { color: #9b59b6; } /* Purple */
.tool-card-icon-wrapper.gif-png .icon-to { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.gif-jpg .icon-to { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.webp-png .icon-from { color: #22c55e; } /* Green */
.tool-card-icon-wrapper.webp-png .icon-to { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.jpg-pdf .icon-from { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.png-pdf .icon-from { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.jpg-pdf .icon-to,
.tool-card-icon-wrapper.png-pdf .icon-to { color: #ef4444; } /* Red */
.tool-card-icon-wrapper.tiff-jpg .icon-from,
.tool-card-icon-wrapper.tiff-png .icon-from { color: #34495e; } /* Dark Gray */
.tool-card-icon-wrapper.tiff-jpg .icon-to { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.tiff-png .icon-to { color: #3b82f6; } /* Blue */
.tool-card-icon-wrapper.bmp-jpg .icon-from,
.tool-card-icon-wrapper.bmp-png .icon-from { color: #64748b; } /* Slate */
.tool-card-icon-wrapper.bmp-jpg .icon-to { color: #f59e0b; } /* Amber */
.tool-card-icon-wrapper.bmp-png .icon-to { color: #3b82f6; } /* Blue */


.tool-card-content { text-align: left; flex-grow: 1; }
.tool-card-title { font-size: 0.9rem; font-weight: 500; color: var(--text-color); margin-bottom: 0; line-height: 1.3; }
.tool-card-description { display: none; } /* Hide description */


/* --- Ad Slot Placeholders --- */
.ad-slot {
    background-color: #eee;
    border: 1px dashed #ccc;
    min-height: 90px; /* Common ad height */
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 25px auto; /* Center and add margin */
    color: #999;
    font-size: 0.9em;
    text-align: center;
    max-width: 728px; /* Common ad width, adjust as needed */
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}
body.dark-mode .ad-slot {
     background-color: #2d3748;
     border-color: #4a5568;
     color: #a0aec0;
}
/* Specific slot adjustments */
.ad-slot-header-main, .ad-slot-header-result { margin-top: 0; margin-bottom: 25px; }
.ad-slot-footer-main, .ad-slot-footer-result { margin-top: 25px; margin-bottom: 0; }


/* --- Result Page Specific Styles --- */
.result-page-container h1 { margin-bottom: 25px; text-align: center; }
.result-display {
    background-color: var(--card-bg-secondary);
    padding: 25px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    text-align: center;
}
.result-message { font-size: 1.1rem; margin-bottom: 15px; display: flex; align-items: center; justify-content: center; }
.result-message i { margin-right: 10px; font-size: 1.3em; }
.result-message.success { /* Styles already defined for .message.success */ }
.result-message.error { /* Styles already defined for .message.error */ }
.result-message.success i { color: var(--success-color); } /* Ensure icon color matches */
.result-message.error i { color: var(--error-color); } /* Ensure icon color matches */
.result-details { color: var(--text-color-secondary); margin-bottom: 25px; font-size: 0.95rem;}
.download-btn-result { /* Styles specifically for result page download */
    display: inline-flex;
    width: auto;
    min-width: 200px;
    padding: 12px 30px;
    font-size: 1rem;
    justify-content: center;
    align-items: center; /* Align icon */
    background-color: var(--success-color);
    color: #fff;
    border: none;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}
.download-btn-result i { margin-right: 8px; }
.download-btn-result:hover {
    background-color: hsl(from var(--success-color) h s calc(l - 5%)); /* Darken */
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.download-hint { font-size: 0.8em; color: var(--text-color-secondary); margin-top: 10px;}
.go-back-btn { /* Button style for Try Again */
    display: inline-block;
    margin-top: 15px;
    background-color: var(--accent-color);
    color: var(--accent-text-color);
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
}
.go-back-btn:hover { background-color: var(--accent-color-hover); }
.go-back-link { /* Style for the simple back link */
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9em;
    margin-top: 15px;
    display: inline-block;
}
.go-back-link:hover {
    text-decoration: underline;
}


/* --- Responsive --- */
@media (max-width: 767px) { /* Adjust breakpoint */
    html { font-size: 15px; }
    .main-grid { grid-template-columns: 1fr; } /* Stack columns */
    .grid-column.column-options { margin-top: 25px; } /* Add space when stacked */
    .container { padding: 25px 20px; }
    .card-header h1 { font-size: 1.5rem; }
}
@media (max-width: 480px) {
    html { font-size: 14px; }
    body { padding: 30px 10px 20px 10px; }
    .container { padding: 20px 15px; }
    .card-header { margin-bottom: 20px; padding-bottom: 10px;}
    .card-header h1 { font-size: 1.3rem; }
    .upload-prompt { font-size: 1rem; }
    .tools-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; } /* Adjust grid for small screens */
    .slider-container { flex-direction: column; align-items: stretch; gap: 8px;}
    .quality-value-display { text-align: center; }
}

/* --- Accessibility: Hide default file input --- */
#file-input {
    width: 0.1px; height: 0.1px; opacity: 0; overflow: hidden; position: absolute; z-index: -1;
}