/* CodeFlow - Modern Encoder/Decoder CSS - Tam Sürüm */

/* CSS Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Enhanced Color Palette */
    --primary-color: #667eea;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #06b6d4;
    --secondary-light: #22d3ee;
    --accent-green: #10b981;
    --accent-green-light: #34d399;
    --accent-purple: #8b5cf6;
    --accent-purple-light: #a78bfa;
    --accent-pink: #ec4899;
    --accent-orange: #f59e0b;
    --accent-cyan: #0891b2;

    /* Background colors */
    --bg-glass: rgba(255, 255, 255, 0.25);
    --bg-card: rgba(255, 255, 255, 0.15);
    --bg-input: rgba(255, 255, 255, 0.1);

    /* Text colors */
    --text-white: rgba(255, 255, 255, 0.95);
    --text-light: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-colored: 0 10px 15px rgba(102, 126, 234, 0.15);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Base styles */
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-family); font-size: var(--font-size-base); line-height: 1.6; color: var(--text-white); background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%); min-height: 100vh; position: relative; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; padding: 0; margin: 0; }

/* Animated background elements */
.background-elements { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; overflow: hidden; }
.floating-shape { position: absolute; border-radius: 50%; opacity: 0.1; animation: float 8s ease-in-out infinite; }
.floating-shape.shape-1 { width: 80px; height: 80px; background: linear-gradient(45deg, var(--accent-green), var(--accent-green-light)); top: 15%; left: 10%; animation-delay: 0s; }
.floating-shape.shape-2 { width: 120px; height: 120px; background: linear-gradient(45deg, var(--accent-purple), var(--accent-purple-light)); top: 65%; right: 15%; animation-delay: 2s; }
.floating-shape.shape-3 { width: 60px; height: 60px; background: linear-gradient(45deg, var(--accent-pink), var(--accent-orange)); bottom: 25%; left: 25%; animation-delay: 4s; }
.floating-shape.shape-4 { width: 100px; height: 100px; background: linear-gradient(45deg, var(--secondary-color), var(--secondary-light)); top: 20%; right: 30%; animation-delay: 1s; }
.floating-shape.shape-5 { width: 90px; height: 90px; background: linear-gradient(45deg, var(--accent-cyan), var(--primary-light)); bottom: 40%; right: 20%; animation-delay: 3s; }
@keyframes float { 0%, 100% { transform: translateY(0px) rotate(0deg); } 50% { transform: translateY(-25px) rotate(180deg); } }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-4); width: 100%; position: relative; z-index: 1; }

/* Header */
.header { background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(255, 255, 255, 0.2); padding: var(--space-4) 0; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-md); }
.header .container { display: flex; justify-content: space-between; align-items: center; }
.logo-section { display: flex; align-items: center; gap: 1vw; }
.logo-img { height: 6vw; max-height: 48px; min-height: 28px; width: auto; }
.logo-text { font-size: 1.2rem; max-font-size: 1.8rem; color: var(--text-white); margin: 0; font-weight: 700; background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(255,255,255,0.8)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.025em; }
.logo-icon { display: flex; align-items: center; justify-content: center; transition: transform var(--transition-bounce); text-decoration: none; }
.logo-icon:hover { transform: scale(1.1) rotate(5deg); }
@media (max-width: 640px) { .header .container { flex-direction: column; align-items: center; } .logo-img { height: 8vw; } .logo-text { font-size: 4.5vw; } .main-nav { margin-left: 0; } }
.main-nav { margin-top: 1rem; margin-left: 2rem; display: flex; align-items: center; }
.nav-links { display: flex; gap: var(--space-6); list-style: none; padding: 0;}
.nav-link { color: var(--text-light); width: auto; text-decoration: none; font-weight: 500; transition: all var(--transition-normal); padding: var(--space-2) 0; position: relative; }
.nav-link:after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary-light); transition: width var(--transition-normal); }
.nav-link:hover, .nav-link.active { color: var(--text-white); }
.nav-link:hover:after, .nav-link.active:after { width: 100%; }

/* KATEGORİ VE FONKSİYON BAR STILLERİ */
.category-section { margin-bottom: var(--space-4); margin-top: var(--space-8); }
.tabs-container-wrapper { display: flex; align-items: center; justify-content: center; position: relative; width: 100%; }
.category-tabs-container { overflow: hidden; position: relative; width: 100%; -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%); mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%); }
.category-tabs { display: flex; gap: var(--space-2); justify-content: center; align-items: center; padding: var(--space-3) var(--space-4); background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-radius: var(--radius-2xl); border: 1px solid rgba(255, 255, 255, 0.2); box-shadow: var(--shadow-lg); overflow-x: auto; scroll-behavior: smooth; -ms-overflow-style: none; scrollbar-width: none; }
.category-tabs::-webkit-scrollbar { display: none; }
.arrow-btn { display: flex; align-items: center; justify-content: center; background: var(--bg-glass); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 50%; width: 40px; height: 40px; color: var(--text-white); cursor: pointer; transition: all var(--transition-fast); z-index: 10; flex-shrink: 0; margin: 0 var(--space-2); opacity: 1; }
.arrow-btn.hidden { opacity: 0; pointer-events: none; }
.arrow-btn:hover { background: rgba(255, 255, 255, 0.2); transform: scale(1.1); }
.category-tab { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2); background: transparent; border: none; border-radius: var(--radius-lg); padding: var(--space-3) var(--space-4); min-width: 100px; height: 80px; cursor: pointer; transition: all var(--transition-normal); color: var(--text-light); font-weight: 500; font-size: var(--font-size-sm); white-space: nowrap; flex-shrink: 0; }
.category-tab:hover { background: rgba(255, 255, 255, 0.1); color: var(--text-white); transform: translateY(-2px); }
.category-tab.active { background: rgba(255, 255, 255, 0.2); color: var(--text-white); box-shadow: var(--shadow-sm); font-weight: 600; }
.category-tab .tab-icon { font-size: var(--font-size-2xl); line-height: 1; }
.category-tab .tab-text { font-size: var(--font-size-sm); font-weight: 600; }

.function-section { margin-bottom: var(--space-4); }
.function-tabs { display: none; gap: var(--space-2); justify-content: center; flex-wrap: wrap; background: rgba(0, 0, 0, 0.1); border-radius: var(--radius-lg); padding: var(--space-3); border: 1px solid rgba(255, 255, 255, 0.1); }
.function-tabs.active { display: flex; }
.function-tab { background: transparent; border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); padding: var(--space-2) var(--space-4); cursor: pointer; transition: all var(--transition-normal); color: var(--text-light); font-weight: 500; font-size: var(--font-size-sm); 
    /* SİLO MİMARİSİ: <a> etiketleri için eklendi */
    text-decoration: none; 
    display: inline-block;
    /* --- */
}
.function-tab[disabled] { opacity: 0.5; cursor: not-allowed; }
.function-tab:not([disabled]):hover { background: rgba(255, 255, 255, 0.15); color: var(--text-white); border-color: rgba(255, 255, 255, 0.3); }
.function-tab.active { background: var(--primary-light); color: var(--text-white); border-color: var(--primary-light); font-weight: 600; box-shadow: var(--shadow-sm); }
.function-tabs .placeholder-text { color: var(--text-muted); font-size: var(--font-size-sm); padding: var(--space-2) 0; }

/* Coder section */
.coder-section { display: flex; justify-content: center; position: relative; }
.coder-card { background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-3xl); padding: var(--space-8); width: 100%; max-width: 800px; box-shadow: var(--shadow-colored); position: relative; z-index: 2; }
.coder-header { text-align: center; margin-bottom: var(--space-8); }
.coder-title { font-size: var(--font-size-3xl); font-weight: 700; background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(255,255,255,0.8)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--space-2); letter-spacing: -0.025em; }
.coder-subtitle { color: var(--text-light); font-size: var(--font-size-lg); font-weight: 400; }

/* Input section */
.input-section { margin-bottom: var(--space-6); }
.input-group { display: flex; flex-direction: column; gap: var(--space-2); }
.input-label { font-size: var(--font-size-sm); font-weight: 600; color: var(--text-white); }
.text-input { background: var(--bg-input); border: 2px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); padding: var(--space-4); font-size: var(--font-size-base); font-weight: 400; color: var(--text-white); transition: all var(--transition-normal); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); width: 100%; resize: vertical; font-family: var(--font-family); line-height: 1.5; }
.text-input:focus { outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.3); background: rgba(255, 255, 255, 0.15); }
.text-input::placeholder { color: var(--text-muted); }

/* Mode selection */
.mode-selection { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-4); align-items: end; margin-bottom: var(--space-8); }
.mode-group { display: flex; flex-direction: column; gap: var(--space-2); min-width: 0; }
.shift-group { display: flex; flex-direction: column; gap: var(--space-2); min-width: 0; }
.mode-label, .shift-label { font-size: var(--font-size-sm); font-weight: 600; color: var(--text-white); }
.mode-dropdown, .shift-input { appearance: none; background: var(--bg-input); border: 2px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); padding: var(--space-4); font-size: var(--font-size-base); font-weight: 500; color: var(--text-white); cursor: pointer; transition: all var(--transition-normal); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); width: 100%; min-width: 0; }
.mode-dropdown { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='rgba(255,255,255,0.7)' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m6 8 4 4 4-4'/%3e%3c/svg%3e"); background-position: right var(--space-3) center; background-repeat: no-repeat; background-size: 1.2rem; padding-right: 3rem; }
.mode-dropdown:focus, .shift-input:focus { outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.3); background-color: rgba(255, 255, 255, 0.15); }
.mode-dropdown:hover, .shift-input:hover { border-color: rgba(255, 255, 255, 0.4); background-color: rgba(255, 255, 255, 0.15); }
.mode-dropdown option { background: #2D3748; color: white; padding: var(--space-2); }
.mode-dropdown:disabled { cursor: not-allowed; opacity: 0.6; background-color: rgba(255, 255, 255, 0.05); }

/* Transform button */
.transform-button { display: flex; align-items: center; justify-content: center; gap: var(--space-2); width: 60px; height: 60px; background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-light)); border: none; border-radius: 50%; cursor: pointer; transition: all var(--transition-bounce); color: white; box-shadow: var(--shadow-lg); flex-shrink: 0; font-size: var(--font-size-sm); font-weight: 600; }
.transform-button:hover { transform: scale(1.1); box-shadow: var(--shadow-glow); background: linear-gradient(135deg, var(--accent-purple-light), var(--primary-color)); }
.transform-button .button-text { display: none; }

/* Output section */
.output-section { margin-bottom: var(--space-8); display: none; }
.output-section.show { display: block; }
.output-group { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }
.output-label { font-size: var(--font-size-sm); font-weight: 600; color: var(--text-white); }
.text-output { background: var(--bg-input); border: 2px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); padding: var(--space-4); font-size: var(--font-size-base); font-weight: 400; color: var(--text-white); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); width: 100%; resize: vertical; font-family: var(--font-family); line-height: 1.5; cursor: text; }
.text-output::placeholder { color: var(--text-muted); }
.output-actions { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; }
.copy-button, .clear-button { display: flex; align-items: center; gap: var(--space-2); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); padding: var(--space-3) var(--space-4); cursor: pointer; transition: all var(--transition-normal); color: var(--text-white); font-size: var(--font-size-sm); font-weight: 500; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.copy-button:hover:not([disabled]) { background: rgba(16, 185, 129, 0.2); border-color: var(--accent-green); transform: translateY(-2px); }
.clear-button:hover { background: rgba(239, 68, 68, 0.2); border-color: #ef4444; transform: translateY(-2px); }
.copy-button[disabled] { opacity: 0.7; cursor: default; transform: none; background: rgba(255, 255, 255, 0.1);}

/* YENİ EKLENEN ÖZEL UI STİLLERİ */
.tool-ui-container { width: 100%; }
.regex-group, .find-replace-group { margin-bottom: var(--space-6); }
.find-replace-controls { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); align-items: end; margin-bottom: var(--space-6); }
.find-replace-options { grid-column: 1 / -1; display: flex; gap: var(--space-4); margin-top: var(--space-4); }
.checkbox-label { display: flex; align-items: center; gap: var(--space-2); color: var(--text-light); font-size: var(--font-size-sm); cursor: pointer; }
.checkbox-label input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--primary-light); }
.small-input { padding: var(--space-3); } /* Daha küçük inputlar için */
.regex-test-button, .find-replace-button { 
    width: 100%; 
    height: auto; 
    border-radius: var(--radius-lg); 
    padding: var(--space-4);
    margin-top: var(--space-4);
    font-size: var(--font-size-base);
    grid-column: 1 / -1; /* FR grid'inde tam genişlik kapla */
}
.find-replace-button { grid-column: 1 / -1; margin-top: 0; } /* FR grid'i için ayar */
.regex-test-button .button-text, .find-replace-button .button-text { display: inline; }
.regex-test-button svg, .find-replace-button svg { font-size: 1.2em; }


/* Format info */
.format-info { background: rgba(255, 255, 255, 0.05); border-radius: var(--radius-xl); padding: var(--space-6); margin-bottom: var(--space-8); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); border: 1px solid rgba(255, 255, 255, 0.1); }
.info-content { display: flex; gap: var(--space-4); align-items: flex-start; }
.info-icon { color: var(--accent-green); flex-shrink: 0; padding-top: .2em;}
.info-text { flex: 1; }
.info-title { font-size: var(--font-size-lg); font-weight: 600; color: var(--text-white); margin-bottom: var(--space-2); }
.info-description { font-size: var(--font-size-base); color: var(--text-light); line-height: 1.6; }

/* Examples section */
.examples-section { background: rgba(255, 255, 255, 0.05); border-radius: var(--radius-xl); padding: var(--space-6); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); border: 1px solid rgba(255, 255, 255, 0.1); }
.examples-title { font-size: var(--font-size-lg); font-weight: 600; color: var(--text-white); margin-bottom: var(--space-4); text-align: center; }
.examples-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-3); }
.example-item { display: flex; align-items: center; justify-content: space-between; background: rgba(255, 255, 255, 0.1); border-radius: var(--radius-lg); padding: var(--space-3); transition: all var(--transition-normal); cursor: pointer; min-width: 0; border: 1px solid rgba(255, 255, 255, 0.1); }
.example-item:hover { background: rgba(255, 255, 255, 0.15); transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: rgba(255, 255, 255, 0.2); }
.example-input, .example-output { font-size: var(--font-size-sm); font-weight: 600; color: var(--text-white); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: 'Monaco', 'Menlo', monospace; }
.example-arrow { color: var(--accent-green); font-weight: bold; font-size: var(--font-size-lg); margin: 0 var(--space-2); flex-shrink: 0; }

/* Responsive design */
@media (max-width: 768px) {
    .container { padding: 0 var(--space-3); }
    .coder-card { padding: var(--space-6); margin: 0 var(--space-2); border-radius: var(--radius-2xl); }
    .coder-title { font-size: var(--font-size-2xl); }
    .mode-selection { grid-template-columns: 1fr; gap: var(--space-4); }
    .transform-button { justify-self: center; margin: var(--space-4) 0; width: 100%; height: 50px; border-radius: var(--radius-xl); flex-direction: row; }
    .transform-button .button-text { display: inline; }
    .category-tabs-container { -webkit-mask-image: linear-gradient(to right, transparent 0%, black 2%, black 98%, transparent 100%); mask-image: linear-gradient(to right, transparent 0%, black 2%, black 98%, transparent 100%); }
    .arrow-btn { display: none; }
    .category-tabs { justify-content: flex-start; }
    .category-tab { padding: var(--space-2) var(--space-3); min-width: 80px; height: 70px; }
    .category-tab .tab-icon { font-size: var(--font-size-xl); }
    .category-tab .tab-text { font-size: 0.8rem; }
    .function-tab { padding: var(--space-2) var(--space-3); font-size: 0.8rem; }
    .examples-grid { grid-template-columns: 1fr; gap: var(--space-2); }
    .floating-shape { display: none; }
    .find-replace-controls { grid-template-columns: 1fr; } /* Mobilde FR inputları alt alta */
}

/* Focus styles */
.category-tab:focus, .function-tab:focus, .text-input:focus, .text-output:focus, .mode-dropdown:focus, .shift-input:focus, .transform-button:focus, .copy-button:focus, .clear-button:focus, .nav-link:focus, .footer-links-list a:focus, .social-link:focus, .dark-mode-toggle:focus { outline: 3px solid rgba(255, 255, 255, 0.8); outline-offset: 2px; border-radius: var(--radius-sm); }
.arrow-btn:focus, .transform-button:focus, .dark-mode-toggle:focus { border-radius: 50%; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
    .floating-shape { display: none !important; }
}


/* Dark mode styles */
.dark-mode-toggle { position: fixed; bottom: 20px; right: 20px; background: rgba(255, 255, 255, 0.2); border-radius: 50%; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 100; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.2); transition: all 0.3s ease; }
.dark-mode-toggle svg { transition: opacity 0.3s ease; }
.dark-mode-toggle:hover { transform: scale(1.1); }
.dark-mode { background: linear-gradient(135deg, #1a1c2c 0%, #3a2b5a 100%); }
.dark-mode .background-elements .floating-shape { opacity: 0.05; }
.dark-mode .header { background: rgba(17, 24, 39, 0.3); border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .category-tabs { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .category-tab.active { background: rgba(255, 255, 255, 0.1); }
.dark-mode .arrow-btn { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.1); }
.dark-mode .function-tabs { background: rgba(17, 24, 39, 0.5); border-color: rgba(255, 255, 255, 0.1); }
.dark-mode .function-tab { border-color: rgba(255, 255, 255, 0.1); }
.dark-mode .function-tab:not([disabled]):hover { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.15); }
.dark-mode .function-tab.active { background: var(--primary-color); border-color: var(--primary-color); }
.dark-mode .coder-card { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .text-input { background: rgba(17, 24, 39, 0.5); border: 2px solid rgba(255, 255, 255, 0.1); }
.dark-mode .text-input:focus { border-color: var(--primary-color); background: rgba(17, 24, 39, 0.6); }
.dark-mode .mode-dropdown, .dark-mode .shift-input { background: rgba(17, 24, 39, 0.5); border: 2px solid rgba(255, 255, 255, 0.1); }
.dark-mode .mode-dropdown:focus, .dark-mode .shift-input:focus { border-color: var(--primary-color); background: rgba(17, 24, 39, 0.6); }
.dark-mode .mode-dropdown option { background: #111827; }
.dark-mode .copy-button, .dark-mode .clear-button { background: rgba(31, 41, 55, 0.5); border: 1px solid rgba(255, 255, 255, 0.1); }
.dark-mode .copy-button:hover:not([disabled]) { background: rgba(16, 185, 129, 0.3); border-color: var(--accent-green); }
.dark-mode .clear-button:hover { background: rgba(239, 68, 68, 0.3); border-color: #ef4444; }
.dark-mode .format-info { background: rgba(17, 24, 39, 0.3); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .examples-section { background: rgba(17, 24, 39, 0.3); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .example-item { background: rgba(31, 41, 55, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .example-item:hover { background: rgba(31, 41, 55, 0.6); border-color: rgba(255, 255, 255, 0.1); }
.dark-mode .dark-mode-toggle { background: rgba(31, 41, 55, 0.6); border: 1px solid rgba(255, 255, 255, 0.1); }
.dark-mode .checkbox-label { color: var(--text-light); }
.dark-mode .checkbox-label input[type="checkbox"] { accent-color: var(--primary-dark); }
.dark-mode .regex-test-button, .dark-mode .find-replace-button { background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-light)); }


/* Tips Section Styles */
.tips-section { padding: var(--space-8) 0; margin-top: var(--space-8); }
.section-title { font-size: 1.5rem; font-weight: 700; color: var(--text-white); margin-bottom: var(--space-6); text-align: center; background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(255,255,255,0.8)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.025em; }
.tips-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--space-4); }
.tip-card { background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-radius: var(--radius-lg); padding: var(--space-6); border: 1px solid rgba(255, 255, 255, 0.2); transition: all var(--transition-normal); }
.tip-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(255, 255, 255, 0.3); }
.tip-icon { font-size: 2rem; margin-bottom: var(--space-3); }
.tip-title { font-size: 1.2rem; font-weight: 600; color: var(--text-white); margin-bottom: var(--space-2); }
.tip-content { color: var(--text-light); margin-bottom: var(--space-4); line-height: 1.5; }
.tip-link { color: var(--primary-light); text-decoration: none; font-weight: 500; display: inline-block; transition: all var(--transition-normal); }
.tip-link:hover { color: var(--text-white); text-decoration: underline; }

/* Footer Styles */
.footer {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-8) 0 var(--space-4);
    margin-top: var(--space-8);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-logo-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-white);
}

.footer-links {
    display: flex;
    gap: var(--space-8);
}

.footer-links-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: var(--space-4);
}

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

.footer-links-list li {
    margin-bottom: var(--space-2);
}

.footer-links-list a {
    color: var(--text-light);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.footer-links-list a:hover {
    color: var(--text-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    color: var(--text-light);
    transition: all var(--transition-normal);
}

.social-link:hover {
    color: var(--text-white);
}


/* Dark Mode Styles for Tips & Footer */
.dark-mode .tip-card { background: rgba(17, 24, 39, 0.4); border-color: rgba(255, 255, 255, 0.05); }
.dark-mode .tip-card:hover { border-color: rgba(255, 255, 255, 0.1); }
.dark-mode .footer { background: rgba(17, 24, 39, 0.5); border-top: 1px solid rgba(255, 255, 255, 0.05);}

/* Responsive Styles for Tips & Footer */
@media (max-width: 768px) {
    .tips-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; gap: var(--space-6); }
    .footer-links { flex-direction: column; gap: var(--space-6); }
    .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
}


/* Security Box */
.security-box { background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-xl); padding: var(--space-6); margin: var(--space-8) 0; display: flex; gap: var(--space-4); box-shadow: var(--shadow-md); }
.security-icon { flex-shrink: 0; color: var(--accent-green); display: flex; align-items: flex-start; justify-content: center; padding-top: var(--space-1); }
.security-content { flex-grow: 1; }
.security-title { font-size: var(--font-size-lg); font-weight: 600; color: var(--text-white); margin-bottom: var(--space-3); }
.security-list { list-style-type: none; padding: 0; margin: 0; }
.security-list li { position: relative; padding-left: var(--space-6); margin-bottom: var(--space-2); color: var(--text-light); font-size: var(--font-size-sm); }
.security-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-green); font-weight: bold; }
.security-list li strong { color: var(--text-white); }

/* FAQ Section */
.faq-section { padding: var(--space-8) 0; }
.faq-container { display: flex; flex-direction: column; gap: var(--space-4); max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-lg); overflow: hidden; transition: max-height 0.3s ease-out; }
.faq-question { padding: var(--space-4) var(--space-6); display: flex; justify-content: space-between; align-items: center; cursor: pointer; user-select: none; }
.faq-question h3 { font-size: var(--font-size-base); font-weight: 600; color: var(--text-white); margin: 0; }
.faq-toggle { color: var(--text-light); transition: transform var(--transition-normal); }
.faq-item.active .faq-toggle { transform: rotate(180deg); }
.faq-answer { padding: 0 var(--space-6); max-height: 0; overflow: hidden; transition: padding 0.3s ease-out, max-height 0.3s ease-out, opacity 0.3s ease-in-out; opacity: 0; }
.faq-item.active .faq-answer { padding: 0 var(--space-6) var(--space-4); max-height: 500px; opacity: 1; }
.faq-answer p { color: var(--text-light); font-size: var(--font-size-sm); margin: 0; }

/* Blog Preview Section */
.blog-preview-section { padding: var(--space-8) 0; }
.blog-preview-box { background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-xl); padding: var(--space-6); max-width: 800px; margin: 0 auto; box-shadow: var(--shadow-md); }
.blog-title { font-size: var(--font-size-xl); font-weight: 700; color: var(--text-white); margin-bottom: var(--space-4); }
.blog-preview-content { margin-bottom: var(--space-4); }
.blog-excerpt { color: var(--text-light); font-size: var(--font-size-base); margin: 0; }
.blog-full-content { max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.3s ease-out, opacity 0.3s ease-in-out; }
.blog-preview-box.expanded .blog-full-content { max-height: 500px; opacity: 1; margin-top: var(--space-4); }
.blog-actions { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.blog-toggle-button { display: flex; align-items: center; gap: var(--space-2); background: transparent; border: none; color: var(--primary-light); font-size: var(--font-size-sm); font-weight: 600; cursor: pointer; padding: 0; transition: all var(--transition-normal); }
.blog-toggle-button:hover { color: var(--primary-color); }
.blog-toggle-icon { transition: transform var(--transition-normal); }
.blog-preview-box.expanded .blog-toggle-icon { transform: rotate(180deg); }
.blog-preview-box .read-more-text::before { content: "Read more"; }
.blog-preview-box.expanded .read-more-text::before { content: "Show less"; }
.blog-link { color: var(--accent-green); text-decoration: none; font-size: var(--font-size-sm); font-weight: 600; transition: all var(--transition-normal); display: none; }
.blog-preview-box.expanded .blog-link { display: inline-block; }
.blog-link:hover { color: var(--accent-green-light); text-decoration: underline; }

/* Dark mode adjustments for Security, FAQ, Blog */
.dark-mode .security-box { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .faq-item { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }
.dark-mode .blog-preview-box { background: rgba(17, 24, 39, 0.4); border: 1px solid rgba(255, 255, 255, 0.05); }

/* Responsive adjustments for Security, FAQ, Blog */
@media (max-width: 768px) {
    .security-box, .faq-item, .blog-preview-box { padding: var(--space-4); }
}

/* Notification Styles */
.notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%, 100%);
    background: rgba(0, 0, 0, 0.8);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 500;
    z-index: 1001;
    backdrop-filter: blur(5px);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    opacity: 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    border-left: 4px solid var(--primary-color);
}
.notification-success { border-left-color: var(--accent-green); }
.notification-error { border-left-color: #ef4444; }
.notification-warning { border-left-color: var(--accent-orange); }
.notification-info { border-left-color: var(--primary-light); }