:root {
    --primary-color: #03045e;
    --secondary-color: #023e8a;
    --accent-color: #0077b6;
    --light-blue: #0096c7;
    --cyan: #00b4d8;
    --light-cyan: #48cae4;
    --pale-cyan: #90e0ef;
    --very-pale-cyan: #ade8f4;
    --lightest-cyan: #caf0f8;
    --bg-color: #ffffff;
    --text-color: #333333;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
}

[data-theme="dark"] {
    --primary-color: #48cae4;
    --secondary-color: #00b4d8;
    --accent-color: #0096c7;
    --bg-color: #1a1a2e;
    --text-color: #e0e0e0;
    --card-bg: #16213e;
    --border-color: #0f3460;
}

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

html, body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

img,
video,
canvas,
iframe {
    max-width: 100%;
    height: auto;
}

/* Header Styles */
.navbar {
    background-color: var(--card-bg) !important;
    border-bottom: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--accent-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

/* Responsive Navbar Controls */
@media (max-width: 991.98px) {
    .navbar .navbar-nav {
        gap: 10px;
    }
    
    .navbar .navbar-nav .nav-item {
        width: 100%;
    }
    
    #darkModeToggle {
        width: 100%;
        margin-left: 0 !important;
        margin-right: 0 !important;
        margin-top: 5px !important;
    }
}

@media (max-width: 576px) {
    #darkModeToggle {
        height: 50px;
        font-size: 1rem;
    }
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('hero section image.jpg') center/cover;
    opacity: 0.2;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

/* Search Bar */
.search-container {
    max-width: 600px;
    margin: 0 auto 3rem;
}

.search-bar {
    position: relative;
}

.search-bar input {
    border-radius: 50px;
    padding: 15px 50px 15px 20px;
    border: 2px solid var(--border-color);
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 119, 182, 0.25);
}

.search-bar button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border: none;
    color: white;
}

/* Tool Cards */
.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 20px;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 119, 182, 0.2);
    border-color: var(--accent-color);
    text-decoration: none;
    color: inherit;
}

.tool-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 15px;
}

.tool-card h5 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.tool-card p {
    color: var(--text-color);
    opacity: 0.8;
    font-size: 0.9rem;
    flex-grow: 1;
}

/* Category Sections */
.category-section {
    margin: 60px 0;
    padding: 40px 0;
}

.category-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--cyan));
    border-radius: 2px;
}

/* Tool Page Styles */
.tool-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 40px clamp(16px, 4vw, 32px);
    overflow-x: hidden;
}

.tool-header {
    text-align: center;
    margin-bottom: 40px;
}

.tool-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.tool-header p {
    color: var(--text-color);
    opacity: 0.8;
    font-size: 1.1rem;
}

/* Drag and Drop Area */
.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    background: var(--card-bg);
    transition: all 0.3s ease;
    margin-bottom: 30px;
    cursor: pointer;
    position: relative;
    pointer-events: auto;
    user-select: none;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-color);
    background: rgba(0, 119, 182, 0.05);
}

.upload-area i {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.upload-area p {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

.upload-area span {
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* File Display Sections */
.file-display-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 30px;
}

.file-display-box {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.file-display-box h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
    text-align: center;
}

.file-preview {
    width: 100%;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.02);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    max-width: 100%;
}

.file-preview.transparent-bg {
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

[data-theme="dark"] .file-preview.transparent-bg {
    background-image: 
        linear-gradient(45deg, #2a2a3e 25%, transparent 25%),
        linear-gradient(-45deg, #2a2a3e 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #2a2a3e 75%),
        linear-gradient(-45deg, transparent 75%, #2a2a3e 75%);
}

.file-preview.white-bg {
    background: #ffffff;
}

[data-theme="dark"] .file-preview.white-bg {
    background: #ffffff;
}

.file-preview img,
.file-preview video {
    width: 100%;
    height: auto;
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.file-preview-placeholder {
    text-align: center;
    color: var(--text-color);
    opacity: 0.5;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-color), var(--cyan));
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--cyan), var(--light-cyan));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.3);
}

.btn-secondary {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

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

/* Footer */
footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%) !important;
}

/* Dark Mode Toggle */
#darkModeToggle {
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

#darkModeToggle:hover {
    transform: rotate(15deg) scale(1.1);
}

/* Mobile Responsive Button Container */
.tool-button-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 0 15px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-section h1 {
        font-size: 1.8rem;
    }
    
    .hero-section p {
        font-size: 0.95rem;
    }
    
    .file-preview {
        min-height: 150px;
    }
    
    .file-display-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .category-title {
        font-size: 2rem;
    }
    
    .tool-header h1 {
        font-size: 2rem;
    }
    
    /* Mobile button container fixes - comprehensive */
    .text-center.mt-4 {
        display: flex !important;
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
        padding: 0 15px !important;
    }
    
    .text-center.mt-4 > label {
        margin-bottom: 0 !important;
        width: 100% !important;
        text-align: center !important;
        display: block !important;
    }
    
    .text-center.mt-4 .form-select,
    .text-center.mt-4 .form-control {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        display: block !important;
    }
    
    .text-center.mt-4 .btn {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        margin-top: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        display: block !important;
    }
    
    /* Remove inline margin classes on mobile */
    .text-center.mt-4 .ms-2,
    .text-center.mt-4 .ms-3,
    .text-center.mt-4 .me-2,
    .text-center.mt-4 .me-3 {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    
    /* Button group responsive */
    .text-center.mt-4 > * {
        width: 100% !important;
        max-width: 100% !important;
    }
    
    /* Nested divs in button containers */
    .text-center.mt-4 > div {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 10px !important;
    }
    
    .text-center.mt-4 > div .btn {
        width: 100% !important;
        margin: 0 !important;
    }
    
    /* Custom dimensions container */
    #customDimensions {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 10px !important;
    }
    
    #customDimensions label,
    #customDimensions input {
        width: 100% !important;
        margin: 0 !important;
    }
}

@media (max-width: 576px) {
    .tool-card img {
        height: 150px;
    }
    
    .upload-area {
        padding: 40px 15px;
    }
    
    .upload-area i {
        font-size: 3rem;
    }
    
    .upload-area p {
        font-size: 1rem;
    }
    
    .upload-area span {
        font-size: 0.85rem;
    }
    
    .tool-container {
        padding: 20px 15px;
    }
    
    /* Extra small mobile button fixes */
    .text-center.mt-4 {
        gap: 10px !important;
        padding: 0 10px !important;
    }
    
    .text-center.mt-4 .btn {
        padding: 12px 20px !important;
        font-size: 0.95rem !important;
        width: 100% !important;
    }
    
    .text-center.mt-4 .form-select,
    .text-center.mt-4 .form-control {
        font-size: 0.95rem !important;
        padding: 10px 15px !important;
        width: 100% !important;
    }
    
    .text-center.mt-4 label {
        font-size: 0.95rem;
    }
    
    .file-display-box {
        padding: 15px;
    }
    
    .file-display-box h3 {
        font-size: 1.2rem;
    }
    
    /* Ensure buttons don't overlap on very small screens */
    .btn {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .tool-header h1 {
        font-size: 1.75rem;
    }
    
    .tool-header p {
        font-size: 1rem;
    }
}

/* Extra small devices (phones, less than 400px) */
@media (max-width: 400px) {
    .text-center.mt-4 {
        padding: 0 5px !important;
    }
    
    .text-center.mt-4 .btn {
        padding: 10px 15px !important;
        font-size: 0.9rem !important;
    }
    
    .tool-container {
        padding: 15px 10px;
    }
    
    .upload-area {
        padding: 30px 10px;
    }
    
    .upload-area i {
        font-size: 2.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Loading Spinner */
.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* FAQ Styles */
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary-color);
}

.faq-question:hover {
    background: rgba(0, 119, 182, 0.05);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-color);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 20px;
}

/* Blog Styles */
.blog-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 119, 182, 0.2);
}

.blog-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.blog-card-body {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.blog-card h5 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.blog-card p {
    color: var(--text-color);
    opacity: 0.8;
    flex-grow: 1;
}

.blog-article {
    max-width: 900px;
    margin: 0 auto;
}

.blog-hero-image {
    text-align: center;
}

.blog-hero-image img {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 119, 182, 0.2);
    transition: transform 0.3s ease;
}

.blog-hero-image img:hover {
    transform: scale(1.02);
}

.blog-content img {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.15);
    transition: transform 0.3s ease;
}

.blog-content img:hover {
    transform: scale(1.05);
}

.blog-content h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.blog-content h3 {
    color: var(--accent-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

/* Utility Classes */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.shadow-custom {
    box-shadow: 0 5px 20px rgba(0, 119, 182, 0.15) !important;
}

/* Authentication Modal Styles */
.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal-header {
    border-bottom: 2px solid var(--border-color);
    padding: 20px 25px;
}

.modal-title {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.5rem;
}

.modal-body {
    padding: 25px;
}

.modal-body .form-label {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 8px;
}

.modal-body .form-control {
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.modal-body .form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 119, 182, 0.25);
    background-color: var(--bg-color);
    color: var(--text-color);
}

.modal-body .form-control::placeholder {
    color: var(--text-color);
    opacity: 0.5;
}

.modal-body .btn-primary {
    padding: 12px;
    font-weight: 600;
    border-radius: 8px;
    margin-top: 10px;
}

.modal-body .alert {
    border-radius: 8px;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: none;
}

.modal-body .alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.modal-body .alert-success {
    background-color: rgba(25, 135, 84, 0.1);
    color: #198754;
}

.modal-body .text-center a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.modal-body .text-center a:hover {
    color: var(--cyan);
    text-decoration: underline;
}

.modal-body .form-text {
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.85rem;
    margin-top: 5px;
}

/* User Profile Dropdown */
#userProfile .dropdown-toggle {
    color: var(--text-color);
    border-color: var(--border-color);
}

#userProfile .dropdown-toggle:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

#userProfile .dropdown-menu {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    padding: 10px 0;
    margin-top: 10px;
}

#userProfile .dropdown-item {
    color: var(--text-color);
    padding: 10px 20px;
    transition: all 0.3s ease;
}

#userProfile .dropdown-item:hover {
    background-color: rgba(0, 119, 182, 0.1);
    color: var(--accent-color);
}

#userProfile .dropdown-item i {
    width: 20px;
    text-align: center;
}

#userProfile .dropdown-divider {
    border-color: var(--border-color);
    margin: 8px 0;
}

/* Auth Buttons */
#authButtons .btn {
    border-radius: 8px;
    padding: 8px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}

#authButtons .btn-outline-primary {
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

#authButtons .btn-outline-primary:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.3);
}

#authButtons .btn-primary {
    background: linear-gradient(135deg, var(--accent-color), var(--cyan));
    border: none;
}

#authButtons .btn-primary:hover {
    background: linear-gradient(135deg, var(--cyan), var(--light-cyan));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.3);
}

/* Responsive Auth Buttons */
@media (max-width: 768px) {
    #authButtons {
        display: flex;
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }
    
    #authButtons .btn {
        width: 100%;
    }
    
    #userProfile {
        width: 100%;
    }
    
    #userProfile .dropdown-toggle {
        width: 100%;
    }
}

/* About AIVOROPRO Section */
#about-aivoropro {
    background: linear-gradient(135deg, rgba(3, 4, 94, 0.02) 0%, rgba(0, 180, 216, 0.02) 100%);
}

#about-aivoropro h2 {
    font-size: 2.2rem;
    line-height: 1.3;
}

#about-aivoropro .about-content p {
    font-size: 1.05rem;
    text-align: justify;
}

/* Testimonials Section */
#testimonials-section {
    background: linear-gradient(135deg, rgba(72, 202, 228, 0.05) 0%, rgba(0, 180, 216, 0.05) 100%);
}

.testimonial-box {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    height: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.testimonial-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 119, 182, 0.2);
    border-color: var(--accent-color);
}

.testimonial-stars {
    color: #ffc107;
    font-size: 1.2rem;
    letter-spacing: 3px;
}

.testimonial-text {
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.7;
    font-style: italic;
    min-height: 120px;
}

.testimonial-author {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.testimonial-author strong {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.testimonial-author small {
    color: var(--text-color);
    opacity: 0.7;
}

/* Responsive Testimonials */
@media (max-width: 768px) {
    #about-aivoropro h2 {
        font-size: 1.8rem;
    }
    
    #about-aivoropro .about-content p {
        font-size: 1rem;
        text-align: left;
    }
    
    .testimonial-box {
        padding: 25px;
    }
    
    .testimonial-text {
        min-height: auto;
    }
}