/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Theming */
:root {
    --bg-color: #f4f7f6;
    --bg-secondary: #ffffff;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --accent: #4f46e5; /* Indigo 600 */
    --accent-hover: #4338ca;
    --accent-glow: rgba(79, 70, 229, 0.2);
    --border-color: #e5e7eb;
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-border: rgba(255, 255, 255, 0.8);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --modal-bg: rgba(255, 255, 255, 0.95);
    --backdrop: rgba(17, 24, 39, 0.5);
    --danger: #ef4444;
    --success: #10b981;
}

[data-theme="dark"] {
    --bg-color: #111827;
    --bg-secondary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --accent: #6366f1; /* Indigo 500 */
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.25);
    --border-color: #374151;
    --card-bg: rgba(31, 41, 55, 0.5);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --modal-bg: rgba(31, 41, 55, 0.95);
    --backdrop: rgba(0, 0, 0, 0.7);
}

/* Base Reset & Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Subtle background glowing orb effect */
body::before {
    content: '';
    position: fixed;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--accent);
    filter: blur(150px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -150px;
    left: -100px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: #ec4899; /* Subtle secondary orb */
    filter: blur(150px);
    opacity: 0.1;
    z-index: -1;
    pointer-events: none;
}

a {
    color: var(--accent);
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* Header & Nav */
header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent);
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff !important;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 20px;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Tools Grid */
.tools-section {
    padding: 40px 20px 80px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

/* Glassmorphism Card Element */
.tool-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    box-shadow: var(--card-shadow);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tool-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.tool-icon {
    width: 64px;
    height: 64px;
    background-color: var(--accent-glow);
    color: var(--accent);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 28px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    background-color: var(--accent);
    color: #fff;
}

.tool-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tool-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* SEO Content Section */
.seo-content {
    background-color: var(--bg-secondary);
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
}

.seo-content h2 {
    font-size: 32px;
    margin-bottom: 24px;
}

.seo-content h3 {
    font-size: 24px;
    margin-top: 24px;
    margin-bottom: 16px;
}

.seo-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

/* Standard Pages layout */
.page-header {
    background-color: var(--bg-secondary);
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 40px;
    margin-bottom: 16px;
}

.page-content {
    padding: 60px 0;
    max-width: 800px;
}

.page-content h2 {
    margin-top: 32px;
    margin-bottom: 16px;
}

.page-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--backdrop);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--modal-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--danger);
}

.modal-body {
    padding: 24px;
}

/* File Upload drag & drop zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background-color: var(--accent-glow);
}

.upload-icon {
    font-size: 48px;
    color: var(--accent);
    margin-bottom: 16px;
}

.upload-zone p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.file-input {
    display: none;
}

/* File item representation in modal */
.file-list {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.file-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
}

.file-item-info i {
    color: var(--danger); /* PDF icon color often red */
    font-size: 20px;
}

.file-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

.file-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

.file-remove:hover {
    color: var(--danger);
}

.tool-actions {
    margin-top: 24px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Progress output */
.processing-overlay {
    display: none;
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--modal-bg);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 10;
    border-radius: 16px;
}
.processing-overlay.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s infinite linear;
    margin-bottom: 16px;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* Footer */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-col p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-color);
    border-radius: 50%;
    color: var(--text-primary);
    transition: all 0.2s;
}

.social-links a:hover {
    background-color: var(--accent);
    color: #fff;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
}

/* Toasts */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--accent);
    color: var(--text-primary);
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast.success { border-left-color: var(--success); }
.toast.success i { color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.error i { color: var(--danger); }

/* Responsive adjustments */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile nav approach - could be expanded to a hamburger menu */
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.active {
        display: flex;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero h1 {
        font-size: 32px;
    }
}