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

:root {
    --primary-color: #5B21B6;
    --primary-dark: #4C1D95;
    --secondary-color: #DB2777;
    --accent-color: #F59E0B;
    --bg-light: #FAFAFA;
    --bg-white: #ffffff;
    --text-dark: #18181B;
    --text-gray: #71717A;
    --border-color: #E4E4E7;
    --success-color: #059669;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation Bar */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand a {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.5rem;
}

.logo {
    font-size: 2rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 3px;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: var(--gradient-1);
    color: white;
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
    opacity: 0.3;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    position: relative;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

/* Ad Placeholder */
.ad-placeholder {
    padding: 2rem 0;
}

.ad-space {
    background: linear-gradient(45deg, #f3f4f6 25%, transparent 25%, transparent 75%, #f3f4f6 75%, #f3f4f6),
                linear-gradient(45deg, #f3f4f6 25%, transparent 25%, transparent 75%, #f3f4f6 75%, #f3f4f6);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    color: var(--text-gray);
    font-weight: 500;
}

/* Tools Section */
.tools-section {
    padding: 4rem 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 2.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.section-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

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

.tool-card {
    background-color: var(--bg-white);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.tool-card:nth-child(1) .tool-icon { background: var(--gradient-1); }
.tool-card:nth-child(2) .tool-icon { background: var(--gradient-2); }
.tool-card:nth-child(3) .tool-icon { background: var(--gradient-3); }
.tool-card:nth-child(4) .tool-icon { background: var(--gradient-4); }
.tool-card:nth-child(5) .tool-icon { background: var(--gradient-1); }
.tool-card:nth-child(6) .tool-icon { background: var(--gradient-2); }

.tool-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.tool-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    font-weight: 600;
}

.tool-description {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.6;
}

.tool-btn {
    display: inline-block;
    background: var(--gradient-1);
    color: white;
    padding: 0.875rem 1.75rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: var (--shadow-md);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: white;
    font-weight: 600;
}

.footer-section p {
    color: #94a3b8;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: #94a3b8;
}

/* Tool Page Styles */
.tool-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.tool-header {
    background: var(--gradient-1);
    color: white;
    padding: 2.5rem 0;
    text-align: center;
}

.tool-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.tool-header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

.tool-container {
    flex: 1;
    padding: 3rem 0;
}

.tool-content {
    background-color: var(--bg-white);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(45deg, #fafafa 25%, transparent 25%, transparent 75%, #fafafa 75%, #fafafa),
                linear-gradient(45deg, #fafafa 25%, transparent 25%, transparent 75%, #fafafa 75%, #fafafa);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    background-color: white;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(91, 33, 182, 0.03);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(91, 33, 182, 0.08);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.upload-area h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

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

.file-input {
    display: none;
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
}

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

.btn-success {
    background: var(--gradient-4);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--text-gray);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--text-dark);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.control-group input[type="number"],
.control-group input[type="text"],
.control-group input[type="range"],
.control-group select {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 33, 182, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.preview-area {
    margin-top: 2rem;
    text-align: center;
}

.preview-image {
    max-width: 100%;
    max-height: 500px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.result-info {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.result-info h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: 600;
    color: var(--text-dark);
}

.info-value {
    color: var(--text-gray);
    font-weight: 500;
}

textarea {
    width: 100%;
    min-height: 250px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 33, 182, 0.1);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-gray);
    font-size: 0.9rem;
    font-weight: 500;
}

.generated-output {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    margin-top: 2rem;
}

.password-display {
    background-color: white;
    padding: 1.25rem;
    border-radius: 10px;
    font-size: 1.5rem;
    font-family: 'Courier New', monospace;
    color: var(--text-dark);
    margin: 1rem 0;
    word-break: break-all;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.hidden {
    display: none;
}

.alert {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-info {
    background-color: rgba(91, 33, 182, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(91, 33, 182, 0.3);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.alert-success {
    background-color: rgba(5, 150, 105, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(5, 150, 105, 0.3);
}

/* Loading Spinner */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    background: var(--gradient-1);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 20px;
        width: 100%;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .section-title {
        font-size: 1.75rem;
    }

    .tool-header h1 {
        font-size: 1.75rem;
    }

    .controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 3rem 0;
    }

    .tool-content {
        padding: 1.5rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }
}