@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&family=Roboto:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Colors - Light Theme based on deeplek.com */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f3f5;
    --bg-glass: rgba(255, 255, 255, 0.95);
    
    --border-subtle: rgba(0, 0, 0, 0.05);
    --border-medium: rgba(0, 0, 0, 0.1);
    --border-bright: rgba(0, 0, 0, 0.15);
    
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --text-accent: #3BB4B4;
    
    --accent-primary: #3BB4B4;
    --accent-secondary: #E47911;
    --accent-gradient: linear-gradient(135deg, #E47911, #D2680D);
    --accent-gradient-hover: linear-gradient(135deg, #D2680D, #B8590A);
    --accent-glow: rgba(228, 121, 17, 0.3);
    --accent-glow-cyan: rgba(59, 180, 180, 0.2);
    
    --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px; --space-xl: 32px;
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 15px rgba(59, 180, 180, 0.2);
    
    --font-sans: 'Poppins', sans-serif;
    --font-heading: 'Roboto', sans-serif;
}

body.dark-theme {
    --bg-primary: #0f1115;
    --bg-secondary: #1a1d24;
    --bg-surface: #1a1d24;
    --bg-surface-hover: #252932;
    --bg-glass: rgba(26, 29, 36, 0.85);
    
    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-bright: rgba(255, 255, 255, 0.15);
    
    --text-primary: #f8f9fa;
    --text-secondary: #a0aec0;
    --text-tertiary: #718096;
    --text-accent: #4fd1c5;
    
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-sans); background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; overflow-x: hidden; transition: background-color 0.3s ease, color 0.3s ease; }

.app-container { max-width: 1200px; margin: 0 auto; padding: var(--space-lg); }

.app-header { text-align: center; padding: var(--space-lg); background: var(--bg-surface); border-radius: var(--radius-lg); margin-bottom: var(--space-xl); box-shadow: var(--shadow-md); border: 1px solid var(--border-subtle); position: relative; transition: all 0.3s ease;}
.header-top { display: flex; justify-content: center; align-items: center; position: relative;}
.theme-btn { position: absolute; right: 0; background: var(--bg-surface-hover); border: 1px solid var(--border-medium); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--text-primary); transition: all 0.2s; }
.theme-btn:hover { background: var(--border-bright); }

.logo { display: inline-flex; align-items: center; gap: var(--space-md); margin-bottom: var(--space-sm); }
.logo-icon { width: 48px; height: 48px; background: var(--accent-gradient); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 24px; box-shadow: var(--accent-glow); }
.logo-text { font-family: var(--font-heading); font-size: 32px; font-weight: 700; color: var(--accent-primary); }
.app-subtitle { font-size: 14px; color: var(--text-secondary); }
.app-subtitle span { color: var(--text-primary); font-weight: 600; }

.glass-panel { background: var(--bg-glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border-medium); border-radius: var(--radius-lg); padding: var(--space-lg); box-shadow: var(--shadow-sm); transition: all 0.3s ease;}
.panel-header { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-lg); padding-bottom: var(--space-sm); border-bottom: 1px solid var(--border-subtle); }
.panel-icon { font-size: 18px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: rgba(72, 193, 185, 0.1); border-radius: var(--radius-sm); }
.panel-title { font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-secondary); }

.main-grid { display: grid; grid-template-columns: 350px 1fr; gap: var(--space-lg); align-items: start; }
@media (max-width: 900px) { .main-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) {
    .app-container { padding: 10px; width: 100%; box-sizing: border-box; }
    .app-header { padding: 15px; }
    .header-top { flex-direction: column-reverse; gap: 10px; }
    .theme-btn { position: relative; align-self: flex-end; right: auto; top: auto; }
    .logo { flex-direction: column; margin-bottom: 0; gap: 8px; }
    .logo-text { font-size: 22px; text-align: center; }
    .app-subtitle { margin-top: 10px; font-size: 13px; line-height: 1.4; }
    .glass-panel { padding: 15px; }
    .main-grid { gap: 15px; }
    .color-grid { grid-template-columns: 1fr; gap: 10px; }
    .preview-canvas-wrap { padding: 10px; min-height: 250px; }
    #canvas-container canvas, #canvas-container svg { max-width: 100% !important; height: auto !important; }
}

.settings-group { margin-bottom: var(--space-lg); }
.setting-label { display: block; margin-bottom: var(--space-sm); font-size: 13px; font-weight: 500; color: var(--text-secondary); }

.custom-input, .custom-select { width: 100%; padding: 12px; border: 1px solid var(--border-medium); border-radius: var(--radius-sm); background: var(--bg-primary); color: var(--text-primary); font-family: var(--font-sans); font-size: 14px; transition: border-color 0.2s; }
.custom-input:focus, .custom-select:focus { outline: none; border-color: var(--accent-primary); }

.color-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.color-picker-wrap { display: flex; flex-direction: column; gap: 4px; }
.color-picker-wrap label { font-size: 11px; color: var(--text-tertiary); }
.color-picker-wrap input[type="color"] { width: 100%; height: 40px; border: 1px solid var(--border-medium); border-radius: var(--radius-sm); cursor: pointer; padding: 2px; background: var(--bg-primary); transition: all 0.3s; }

.toggle-btn { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-sm) var(--space-md); border: 1px solid var(--border-medium); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-secondary); font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.2s; width: 100%; margin-top: 12px;}
.toggle-btn:hover { border-color: var(--border-bright); color: var(--text-primary); }
.toggle-btn.active { border-color: var(--accent-primary); background: rgba(72, 193, 185, 0.05); color: var(--accent-secondary); }
.toggle-indicator { width: 36px; height: 20px; border-radius: var(--radius-full); background: var(--border-medium); position: relative; transition: background 0.2s; flex-shrink: 0; }
.toggle-indicator::after { content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: var(--text-tertiary); transition: all 0.2s; }
.toggle-btn.active .toggle-indicator { background: rgba(72, 193, 185, 0.3); }
.toggle-btn.active .toggle-indicator::after { left: 18px; background: var(--accent-secondary); }

.file-upload-wrap { display: flex; flex-direction: column; gap: var(--space-sm); }
.file-input-hidden { display: none; }
.btn-secondary { width: 100%; padding: 10px; border: 1px solid var(--border-medium); border-radius: var(--radius-sm); background: var(--bg-surface); color: var(--text-primary); font-family: var(--font-sans); font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.btn-secondary:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.file-name-display { font-size: 11px; color: var(--text-tertiary); word-break: break-all; }
.btn-remove-logo { margin-top: 8px; width: 100%; padding: 6px; border: 1px solid var(--error); border-radius: var(--radius-sm); background: transparent; color: var(--error); font-size: 12px; cursor: pointer; transition: all 0.2s;}
.btn-remove-logo:hover { background: var(--error-bg); }

.btn-process { width: 100%; padding: 14px; border: none; border-radius: var(--radius-md); background: var(--accent-gradient); color: white; font-family: var(--font-sans); font-size: 15px; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: var(--space-sm); transition: transform 0.2s, box-shadow 0.2s; }
.btn-process:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.mt-2 { margin-top: 12px; }

.preview-canvas-wrap { display: flex; align-items: center; justify-content: center; min-height: 400px; background-color: #ffffff; background-image: linear-gradient(45deg, rgba(0,0,0,0.05) 25%, transparent 25%), linear-gradient(-45deg, rgba(0,0,0,0.05) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, rgba(0,0,0,0.05) 75%), linear-gradient(-45deg, transparent 75%, rgba(0,0,0,0.05) 75%); background-size: 16px 16px; background-position: 0 0, 0 8px, 8px -8px, -8px 0px; border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: var(--space-lg); transition: border-color 0.3s;}

.app-footer { text-align: center; margin-top: var(--space-2xl); padding: var(--space-xl) 0 var(--space-md); font-size: 13px; color: var(--text-tertiary); border-top: 1px solid var(--border-subtle); }
.app-footer strong { color: var(--accent-primary); font-weight: 600; }