/* Modern CSS Reset and Base Styles */
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --accent: #f72585;
    --success: #4cc9f0;
    --warning: #ff9e00;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 16px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --gradient-primary: linear-gradient(135deg, #4361ee 0%, #7209b7 100%);
    --gradient-secondary: linear-gradient(135deg, #f72585 0%, #ff9e00 100%);
    --gradient-light: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: #f9fafb;
    font-size: 16px;
    overflow-x: hidden;
}

/* Animation Keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.fade-in { animation: fadeInUp 0.8s ease-out forwards; }
.pulse { animation: pulse 2s infinite; }
.float { animation: float 3s ease-in-out infinite; }

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Modern Header */
.header-animate {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header-animate .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    animation: fadeInUp 1s ease-out;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.logo-text h1 {
    font-size: 1.8rem;
    margin: 0;
    color: var(--dark);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text p {
    font-size: 0.9rem;
    color: var(--gray);
    margin: 0;
}

/* Default Navigation (Desktop) */
nav ul {
    display: flex;
    gap: 10px;
    list-style: none;
    flex-wrap: wrap;
}

nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 8px;
}

nav a i {
    font-size: 1.1rem;
}

nav a.active,
nav a:hover {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary);
}

/* Tool Section Styles */
.tool-page-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: var(--gradient-primary);
    color: white;
}

.tool-page-header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.tool-page-header p {
    color: rgba(255, 255, 255, 0.9);
}

.tool-section {
    background-color: #fff;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.tool-section h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    color: var(--dark);
    font-size: 1.8rem;
}

.tool-description {
    margin-bottom: 30px;
    color: var(--gray);
    font-size: 1.1rem;
}

/* File Upload Area */
.file-upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px;
    border: 2px dashed #d0d0d0;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background: var(--light);
}

.file-upload-area:hover,
.file-upload-area.drag-over {
    border-color: var(--primary);
    background-color: rgba(67, 97, 238, 0.05);
}

.file-upload-area i {
    font-size: 3em;
    color: var(--primary);
    margin-bottom: 15px;
}

.file-upload-label {
    background: var(--gradient-primary);
    color: #fff;
    padding: 12px 25px;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    display: inline-block;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.file-upload-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
}

/* Tool Options */
.tool-options {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.option-card {
    background-color: var(--light);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    flex-basis: calc(25% - 15px);
    transition: var(--transition);
    border: 2px solid transparent;
}

.option-card:hover,
.option-card.selected {
    border-color: var(--primary);
    background-color: rgba(67, 97, 238, 0.05);
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.option-card i {
    font-size: 2em;
    margin-bottom: 10px;
    color: var(--primary);
}

/* Buttons */
.process-button {
    width: 100%;
    padding: 15px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.process-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
}

.process-button:disabled {
    background: var(--gray-light);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Status Messages */
.status-message {
    margin-top: 20px;
    text-align: center;
    font-weight: 600;
    padding: 15px;
    border-radius: var(--border-radius);
}

.status-message.success {
    color: #27ae60;
    background: rgba(39, 174, 96, 0.1);
}

.status-message.error {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}

/* Footer */
.footer-animate {
    background: var(--dark);
    color: white;
    padding: 60px 0 20px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Hide file inputs */
input[type="file"] {
    display: none;
}

/* ====================================================================== */
/* --- RESPONSIVE DESIGN FIXES (For App-like Mobile Experience) --- */
/* ====================================================================== */
@media (max-width: 768px) {
    /* Header & Navigation Fixes */
    .header-animate .container {
        /* Logo aur nav ko alag-alag line mein rakhega */
        flex-direction: column; 
        gap: 15px;
    }
    
    /* Navigation List (nav ul) Fix */
    nav ul {
        /* FIX: Vertically stack links (ek ke neeche ek) */
        flex-direction: column; 
        /* Links ko full-width lene ke liye stretch karein */
        align-items: stretch;
        /* Poori width le taaki links bhi poori width le sakein */
        width: 100%; 
        gap: 5px; /* Vertical space kam kiya */
        padding: 0 10px; /* Thoda side padding for container */
    }
    
    /* Individual Link (nav a) Fix */
    nav a {
        /* FIX: Link ko poori chaudaai (100%) dein */
        width: 100%; 
        /* Padding thodi badhai for easy tapping */
        padding: 12px 20px; 
        /* Rounded corners kam kiye for stacked look */
        border-radius: 8px; 
        /* Text/Icon ko left-align karein */
        justify-content: flex-start;
    }
    
    /* Tool Section & Cards Fixes */
    .tool-section {
        padding: 20px;
        /* Mobile par section ko full width dein */
        border-radius: 0; /* Corners hata diye for cleaner edge-to-edge look */
        box-shadow: none; /* Shadow hata diya for cleaner look */
    }
    
    .file-upload-area {
        padding: 40px 20px;
    }
    
    .tool-options {
        /* Options ko vertically stack karein */
        flex-direction: column; 
        gap: 10px;
    }
    
    .option-card {
        /* FIX: Har card ko full width dein */
        flex-basis: 100%; 
        width: 100%;
        /* Card ko behtar dikhane ke liye flex use karein */
        display: flex;
        align-items: center;
        text-align: left; /* Text alignment left kiya */
        gap: 15px;
        padding: 15px;
    }

    .option-card i {
        /* Icon aur text ko align karne ke liye margin hataya */
        margin-bottom: 0; 
        /* Icon ki size mobile par thodi choti kar sakte hain */
        font-size: 1.8em; 
    }

    /* Footer Fix */
    .footer-content {
        /* Footer columns stack ho jayenge */
        grid-template-columns: 1fr;
        gap: 30px;
    }
}