/* Reset & Base Styles */
:root {
    /* Color Palette */
    --bg-main: #0B1020;
    --card-primary: #121A2F;
    --card-secondary: #18223A;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    /* Accents */
    --accent-blue: #3B82F6;
    --accent-purple: #8B5CF6;
    --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --accent-gradient-hover: linear-gradient(135deg, #60A5FA, #A78BFA);
    
    /* Semantic */
    --danger: #EF4444;
    --success: #10B981;
    
    /* Layout */
    --header-height: 70px;
    --sidebar-width: 80px;
    --panel-width: 300px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Transitions */
    --transition: all 0.2s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-blue);
}

.hidden {
    display: none !important;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.25rem; }

/* Layout Containers */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    outline: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-gradient-hover);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

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

.btn-secondary:hover:not(:disabled) {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.2);
}

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

.btn-outline:hover:not(:disabled), .btn-outline.active {
    border-color: var(--accent-blue);
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.btn-icon:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--card-secondary);
    border-color: var(--border-color);
}

.w-100 { width: 100%; }
.mt-3 { margin-top: 1rem; }
.mt-auto { margin-top: auto; }

/* Header */
.header {
    height: var(--header-height);
    background: rgba(11, 16, 32, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

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

/* Main Spacing */
main {
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* Hero Section */
.hero-section {
    padding: 6rem 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    margin-bottom: 3rem;
}

/* Upload Area */
.upload-area {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    background: var(--card-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent-blue);
    background: var(--card-secondary);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
}

.upload-area h3 {
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: var(--text-secondary);
}

.upload-or {
    margin: 1rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
}

.upload-formats {
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

/* Editor Section */
.editor-section {
    height: calc(100vh - var(--header-height));
    display: flex;
    flex-direction: column;
    padding: 1rem;
}

.editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--card-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-primary);
}

.editor-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.editor-layout {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Sidebar */
.editor-sidebar {
    width: var(--sidebar-width);
    background: var(--card-primary);
    border-right: 1px solid var(--border-color);
    padding: 1rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tools-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.75rem 0;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.tool-btn i {
    width: 20px;
    height: 20px;
}

.tool-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.tool-btn.active {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
    border-right: 2px solid var(--accent-blue);
}

/* Tool Options Panel */
.tool-options-panel {
    width: var(--panel-width);
    background: var(--card-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.tool-options {
    display: none;
}

.tool-options.active {
    display: block;
}

.tool-options h3 {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    color: var(--text-primary);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.option-group {
    margin-bottom: 1.25rem;
}

.option-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.flex-between {
    display: flex;
    justify-content: space-between;
}

/* Inputs & Forms */
input[type="number"], select {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

input[type="number"]:focus, select:focus {
    border-color: var(--accent-blue);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent-blue);
}

.btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 0.5rem;
}

.dimensions-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-wrap {
    flex: 1;
}

.link-icon {
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.checkbox-wrap input {
    accent-color: var(--accent-blue);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.checkbox-wrap label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.format-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.action-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.action-btn {
    justify-content: flex-start;
}

.note {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-row .highlight {
    color: var(--accent-blue);
    font-weight: 500;
}

.panel-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.5rem 0;
}

.text-sm {
    font-size: 0.875rem;
}

/* Preview Area */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #000;
    position: relative;
    overflow: hidden;
}

.preview-toolbar {
    height: 48px;
    background: var(--card-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#zoomValue {
    font-size: 0.875rem;
    width: 48px;
    text-align: center;
}

.compare-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
}

.switch input { 
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255, 255, 255, 0.2);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--accent-blue);
}

input:checked + .slider:before {
    transform: translateX(16px);
}

.slider.round {
    border-radius: 20px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Canvas Container */
.canvas-container {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: 2rem;
    /* Checkerboard for transparency */
    background-image: 
        linear-gradient(45deg, #1f2937 25%, transparent 25%), 
        linear-gradient(-45deg, #1f2937 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #1f2937 75%), 
        linear-gradient(-45deg, transparent 75%, #1f2937 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

canvas {
    max-width: none;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    transform-origin: center center;
    transition: transform 0.1s ease;
}

/* Crop Overlay UI */
.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none; /* Let clicks pass through except for the crop box */
}

.crop-box {
    position: absolute;
    border: 2px dashed #fff;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6);
    pointer-events: auto;
    cursor: move;
}

.crop-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-blue);
    border: 2px solid #fff;
    border-radius: 50%;
}

.crop-handle.nw { top: -6px; left: -6px; cursor: nwse-resize; }
.crop-handle.n { top: -6px; left: calc(50% - 6px); cursor: ns-resize; }
.crop-handle.ne { top: -6px; right: -6px; cursor: nesw-resize; }
.crop-handle.w { top: calc(50% - 6px); left: -6px; cursor: ew-resize; }
.crop-handle.e { top: calc(50% - 6px); right: -6px; cursor: ew-resize; }
.crop-handle.sw { bottom: -6px; left: -6px; cursor: nesw-resize; }
.crop-handle.s { bottom: -6px; left: calc(50% - 6px); cursor: ns-resize; }
.crop-handle.se { bottom: -6px; right: -6px; cursor: nwse-resize; }

.option-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}
.option-actions button {
    flex: 1;
}


/* Landing Page Elements */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.features-section, .how-it-works-section, .faq-section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card[data-target-tool] {
    cursor: pointer;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* How It Works */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    text-align: center;
    padding: 2rem;
    position: relative;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    margin-bottom: 1rem;
}

.step-card h3 {
    margin-bottom: 0.75rem;
}

.step-card p {
    color: var(--text-secondary);
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
}

.faq-question i {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.25rem;
    max-height: 200px;
}

.faq-answer p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--card-primary);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom a {
    color: var(--accent-blue);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--card-secondary);
    border-left: 4px solid var(--accent-blue);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease forwards;
}

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

.toast.hiding {
    animation: fadeOut 0.3s ease forwards;
}

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

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

/* Responsive */
@media (max-width: 992px) {
    .editor-layout {
        flex-direction: column;
    }
    
    .editor-sidebar {
        width: 100%;
        height: auto;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 0.5rem;
        overflow-x: auto;
    }
    
    .tools-list {
        flex-direction: row;
        gap: 0;
    }
    
    .tool-btn {
        min-width: 70px;
        padding: 0.5rem;
    }
    
    .tool-btn.active {
        border-right: none;
        border-bottom: 2px solid var(--accent-blue);
    }
    
    .tool-options-panel {
        width: 100%;
        height: auto;
        max-height: 250px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile nav approach for now */
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .editor-section {
        padding: 0;
        height: 100vh;
        height: 100dvh; /* Mobile viewport fix */
        border-radius: 0;
    }
    
    .editor-container {
        border-radius: 0;
        border: none;
    }
    
    .editor-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .footer-top {
        flex-direction: column;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}