/* Buttons */
.btn {
display: inline-flex;
align-items: center;
justify-content: center;
gap: var(--space-sm);
padding: 0.75rem 1.5rem;
font-size: 0.95rem;
font-weight: 500;
border-radius: var(--radius-md);
border: none;
cursor: pointer;
transition: all var(--transition-fast);
outline: none;
user-select: none;
}

.btn-primary {
background-color: var(--primary-color);
color: white;
box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
background-color: var(--primary-dark);
transform: translateY(-2px);
box-shadow: var(--shadow-md);
}

.btn-primary:active {
transform: translateY(0);
}

.btn-outline {
background-color: transparent;
color: var(--primary-color);
border: 2px solid var(--primary-color);
}

.btn-outline:hover {
background-color: var(--primary-color);
color: white;
}

.btn-large {
padding: 1rem 2rem;
font-size: 1.1rem;
}

.btn-block {
width: 100%;
}

.btn:disabled {
opacity: 0.6;
cursor: not-allowed;
}

/* Header & Navigation */
.header {
position: sticky;
top: 0;
z-index: 1000;
background-color: var(--bg-primary);
box-shadow: var(--shadow-sm);
border-bottom: 1px solid var(--border-color);
}

.navbar {
padding: var(--space-md) 0;
}

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

.nav-brand {
display: flex;
align-items: center;
gap: var(--space-sm);
}

.logo {
display: flex;
align-items: center;
gap: var(--space-sm);
font-size: 1.5rem;
font-weight: 700;
color: var(--text-primary);
}

.logo i {
color: var(--primary-color);
font-size: 1.8rem;
}

.brand-subtitle {
font-size: 0.8rem;
color: var(--text-muted);
margin-left: var(--space-sm);
}

.nav-menu {
display: flex;
align-items: center;
gap: var(--space-xl);
}

.nav-links {
display: flex;
gap: var(--space-lg);
list-style: none;
}

.nav-links a {
color: var(--text-secondary);
font-weight: 500;
padding: var(--space-sm) 0;
position: relative;
}

.nav-links a.active {
color: var(--primary-color);
}

.nav-links a.active::after {
content: '';
position: absolute;
bottom: 0;
left: 0;
width: 100%;
height: 2px;
background-color: var(--primary-color);
border-radius: var(--radius-full);
}

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

.nav-actions {
display: flex;
align-items: center;
gap: var(--space-md);
}

.theme-toggle {
width: 44px;
height: 44px;
border-radius: var(--radius-full);
background-color: var(--bg-secondary);
border: 1px solid var(--border-color);
color: var(--text-primary);
cursor: pointer;
display: flex;
align-items: center;
justify-content: center;
transition: all var(--transition-fast);
}

.theme-toggle:hover {
background-color: var(--bg-tertiary);
transform: rotate(15deg);
}

.theme-toggle i {
font-size: 1.2rem;
transition: opacity var(--transition-fast);
}

[data-theme="light"] .theme-toggle .fa-sun {
display: none;
}

[data-theme="dark"] .theme-toggle .fa-moon {
display: none;
}

.user-menu {
display: flex;
gap: var(--space-sm);
}

.nav-toggle {
display: none;
background: none;
border: none;
color: var(--text-primary);
font-size: 1.5rem;
cursor: pointer;
padding: var(--space-sm);
}

/* Hero Section */
.hero {
padding: var(--space-3xl) 0;
background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
position: relative;
overflow: hidden;
}

.hero::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-image: url('../images/backgrounds/pattern.svg');
background-size: 300px;
opacity: 0.05;
pointer-events: none;
}

.hero-content {
max-width: 800px;
margin: 0 auto;
text-align: center;
position: relative;
z-index: 1;
}

.hero-title {
font-size: 3rem;
margin-bottom: var(--space-md);
background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
-webkit-background-clip: text;
background-clip: text;
color: transparent;
}

.hero-subtitle {
font-size: 1.25rem;
color: var(--text-secondary);
margin-bottom: var(--space-2xl);
}

.hero-actions {
display: grid;
grid-template-columns: 1fr 1fr;
gap: var(--space-2xl);
margin-top: var(--space-2xl);
}

.file-upload-area {
background-color: var(--bg-secondary);
border: 2px dashed var(--border-color);
border-radius: var(--radius-lg);
padding: var(--space-2xl);
text-align: center;
cursor: pointer;
transition: all var(--transition-normal);
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
min-height: 300px;
}

.file-upload-area:hover {
border-color: var(--primary-color);
background-color: var(--bg-tertiary);
transform: translateY(-4px);
box-shadow: var(--shadow-lg);
}

.file-upload-area.dragover {
border-color: var(--primary-color);
background-color: var(--bg-tertiary);
transform: scale(1.02);
}

.upload-icon {
font-size: 4rem;
color: var(--primary-color);
margin-bottom: var(--space-lg);
}

.file-upload-area h3 {
font-size: 1.5rem;
margin-bottom: var(--space-sm);
}

.file-upload-area p {
color: var(--text-muted);
margin-bottom: var(--space-md);
}

.upload-note {
font-size: 0.9rem;
margin-top: var(--space-lg);
color: var(--text-muted);
}

.quick-tools {
background-color: var(--bg-secondary);
border-radius: var(--radius-lg);
padding: var(--space-xl);
}

.quick-tools h3 {
margin-bottom: var(--space-lg);
text-align: center;
}

.quick-tools-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: var(--space-md);
}

.quick-tool {
display: flex;
flex-direction: column;
align-items: center;
gap: var(--space-sm);
padding: var(--space-lg);
background-color: var(--bg-primary);
border-radius: var(--radius-md);
border: 1px solid var(--border-color);
transition: all var(--transition-fast);
}

.quick-tool:hover {
background-color: var(--bg-tertiary);
transform: translateY(-2px);
box-shadow: var(--shadow-md);
border-color: var(--primary-color);
}

.quick-tool i {
font-size: 2rem;
color: var(--primary-color);
}

.quick-tool span {
font-weight: 500;
color: var(--text-primary);
}

/* Tools Sections */
.tools-section {
padding: var(--space-3xl) 0;
}

.section-header {
text-align: center;
margin-bottom: var(--space-3xl);
}

.section-header h2 {
display: flex;
align-items: center;
justify-content: center;
gap: var(--space-md);
margin-bottom: var(--space-md);
}

.section-header h2 i {
color: var(--primary-color);
}

.tools-grid {
display: grid;
grid-template-columns: 1fr;
gap: var(--space-2xl);
}

.tool-category {
margin-bottom: var(--space-xl);
}

.category-title {
font-size: 1.5rem;
margin-bottom: var(--space-lg);
padding-bottom: var(--space-sm);
border-bottom: 2px solid var(--border-color);
}

.tools-list {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
gap: var(--space-lg);
}

.tool-card {
display: flex;
align-items: center;
gap: var(--space-lg);
padding: var(--space-lg);
background-color: var(--bg-secondary);
border-radius: var(--radius-lg);
border: 1px solid var(--border-color);
transition: all var(--transition-normal);
}

.tool-card:hover {
background-color: var(--bg-tertiary);
transform: translateY(-4px);
box-shadow: var(--shadow-lg);
border-color: var(--primary-color);
}

.tool-icon {
width: 60px;
height: 60px;
background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
border-radius: var(--radius-lg);
display: flex;
align-items: center;
justify-content: center;
flex-shrink: 0;
}

.tool-icon i {
font-size: 1.5rem;
color: white;
}

.tool-info h4 {
margin-bottom: var(--space-xs);
color: var(--text-primary);
}

.tool-info p {
font-size: 0.9rem;
color: var(--text-muted);
margin-bottom: 0;
}

/* Features Section */
.features-section {
padding: var(--space-3xl) 0;
background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.features-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: var(--space-xl);
margin-top: var(--space-2xl);
}

.feature-card {
text-align: center;
padding: var(--space-xl);
background-color: var(--bg-secondary);
border-radius: var(--radius-lg);
border: 1px solid var(--border-color);
transition: all var(--transition-normal);
}

.feature-card:hover {
background-color: var(--bg-tertiary);
transform: translateY(-4px);
box-shadow: var(--shadow-lg);
}

.feature-icon {
width: 80px;
height: 80px;
background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
border-radius: var(--radius-full);
display: flex;
align-items: center;
justify-content: center;
margin: 0 auto var(--space-lg);
}

.feature-icon i {
font-size: 2rem;
color: white;
}

.feature-card h3 {
margin-bottom: var(--space-md);
}

/* CTA Section */
.cta-section {
padding: var(--space-3xl) 0;
background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
color: white;
text-align: center;
}

.cta-section h2,
.cta-section p {
color: white;
}

.cta-content {
max-width: 800px;
margin: 0 auto;
}

.cta-actions {
display: flex;
gap: var(--space-lg);
justify-content: center;
margin-top: var(--space-xl);
}

/* Footer */
.footer {
background-color: var(--bg-secondary);
padding: var(--space-3xl) 0 var(--space-xl);
border-top: 1px solid var(--border-color);
}

.footer-content {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: var(--space-2xl);
margin-bottom: var(--space-2xl);
}

.footer-section h3 {
font-size: 1.2rem;
margin-bottom: var(--space-lg);
color: var(--text-primary);
}

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

.footer-links li {
margin-bottom: var(--space-sm);
}

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

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

.footer-logo .logo {
margin-bottom: var(--space-md);
}

.footer-description {
color: var(--text-muted);
margin-bottom: var(--space-lg);
}

.footer-social {
display: flex;
gap: var(--space-md);
}

.footer-social a {
width: 40px;
height: 40px;
background-color: var(--bg-tertiary);
border-radius: var(--radius-full);
display: flex;
align-items: center;
justify-content: center;
color: var(--text-primary);
transition: all var(--transition-fast);
}

.footer-social a:hover {
background-color: var(--primary-color);
color: white;
transform: translateY(-2px);
}

.footer-bottom {
padding-top: var(--space-xl);
border-top: 1px solid var(--border-color);
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap: wrap;
gap: var(--space-md);
}

.footer-bottom p {
color: var(--text-muted);
margin-bottom: 0;
}

.footer-bottom-links {
display: flex;
gap: var(--space-lg);
}

.footer-bottom-links a {
color: var(--text-muted);
}

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

/* Modal */
.modal {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: rgba(0, 0, 0, 0.5);
display: none;
align-items: center;
justify-content: center;
z-index: 2000;
padding: var(--space-lg);
}

.modal.active {
display: flex;
}

.modal-content {
background-color: var(--bg-primary);
border-radius: var(--radius-lg);
max-width: 500px;
width: 100%;
max-height: 90vh;
overflow-y: auto;
box-shadow: var(--shadow-xl);
animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
from {
opacity: 0;
transform: translateY(-20px);
}
to {
opacity: 1;
transform: translateY(0);
}
}

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

.modal-header h3 {
margin-bottom: 0;
}

.modal-close {
background: none;
border: none;
font-size: 1.5rem;
color: var(--text-muted);
cursor: pointer;
padding: var(--space-xs);
line-height: 1;
}

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

.modal-body {
padding: var(--space-lg);
}

.modal-footer {
margin-top: var(--space-lg);
padding-top: var(--space-lg);
border-top: 1px solid var(--border-color);
text-align: center;
}

/* Form Styles */
.form-group {
margin-bottom: var(--space-lg);
}

.form-group label {
display: block;
margin-bottom: var(--space-sm);
font-weight: 500;
color: var(--text-primary);
}

.form-group input {
width: 100%;
padding: 0.75rem 1rem;
background-color: var(--bg-secondary);
border: 1px solid var(--border-color);
border-radius: var(--radius-md);
color: var(--text-primary);
font-size: 1rem;
transition: all var(--transition-fast);
}

.form-group input:focus {
outline: none;
border-color: var(--primary-color);
box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.form-options {
display: flex;
justify-content: space-between;
align-items: center;
}

.checkbox {
display: flex;
align-items: center;
gap: var(--space-sm);
cursor: pointer;
}

.checkbox input {
width: auto;
}

.forgot-password {
font-size: 0.9rem;
color: var(--primary-color);
}

/* Progress Bar */
.progress-container {
margin-bottom: var(--space-lg);
}

.progress-bar {
height: 8px;
background-color: var(--bg-tertiary);
border-radius: var(--radius-full);
overflow: hidden;
margin-bottom: var(--space-md);
}

.progress-fill {
height: 100%;
background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
border-radius: var(--radius-full);
width: 0%;
transition: width 0.3s ease;
}

.progress-text {
text-align: center;
color: var(--text-secondary);
font-size: 0.9rem;
}

.file-info {
display: flex;
align-items: center;
gap: var(--space-sm);
padding: var(--space-md);
background-color: var(--bg-secondary);
border-radius: var(--radius-md);
border: 1px solid var(--border-color);
}

.file-info i {
color: var(--primary-color);
}

/* Toast Notifications */
.toast-container {
position: fixed;
bottom: var(--space-lg);
right: var(--space-lg);
z-index: 3000;
display: flex;
flex-direction: column;
gap: var(--space-sm);
max-width: 400px;
}

.toast {
padding: var(--space-md) var(--space-lg);
background-color: var(--bg-primary);
border-left: 4px solid var(--primary-color);
border-radius: var(--radius-md);
box-shadow: var(--shadow-lg);
display: flex;
align-items: center;
gap: var(--space-md);
animation: toastSlideIn 0.3s ease;
transform: translateX(0);
}

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

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

.toast.warning {
border-left-color: var(--warning-color);
}

@keyframes toastSlideIn {
from {
transform: translateX(100%);
opacity: 0;
}
to {
transform: translateX(0);
opacity: 1;
}
}

.toast-icon {
font-size: 1.2rem;
}

.toast.success .toast-icon {
color: var(--success-color);
}

.toast.error .toast-icon {
color: var(--danger-color);
}

.toast.warning .toast-icon {
color: var(--warning-color);
}

.toast-message {
flex: 1;
color: var(--text-primary);
}

.toast-close {
background: none;
border: none;
color: var(--text-muted);
cursor: pointer;
padding: var(--space-xs);
line-height: 1;
}

.toast-close:hover {
color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 992px) {
.hero-actions {
grid-template-columns: 1fr;
}

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.quick-tools-grid {
    grid-template-columns: repeat(4, 1fr);
}

}

@media (max-width: 768px) {
html {
font-size: 14px;
}

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.nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-links {
    flex-direction: column;
    width: 100%;
    text-align: center;
}

.nav-actions {
    flex-direction: column;
    width: 100%;
}

.user-menu {
    flex-direction: column;
    width: 100%;
}

.nav-toggle {
    display: block;
}

.hero-title {
    font-size: 2.5rem;
}

.quick-tools-grid {
    grid-template-columns: repeat(2, 1fr);
}

.tools-list {
    grid-template-columns: 1fr;
}

.features-grid {
    grid-template-columns: 1fr;
}

.cta-actions {
    flex-direction: column;
}

.footer-content {
    grid-template-columns: 1fr;
}

.footer-bottom {
    flex-direction: column;
    text-align: center;
}

}

@media (max-width: 480px) {
.hero-title {
font-size: 2rem;
}

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.quick-tools-grid {
    grid-template-columns: 1fr;
}

.container {
    padding: 0 var(--space-md);
}

}