:root {
    --primary-color: #6e56cf;
    --secondary-color: #00ddeb;
    --accent-color: #ff6b6b;
    --danger-color: #ff4757;
    --border-radius: 16px;
    --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.15);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --success-color: #10b981;
    --error-color: #ef4444;
    --info-color: #3b82f6;
}

.light-theme {
    --background-color: linear-gradient(145deg, #f0f4ff 0%, #d9e2ff 100%);
    --text-color: #1e2a44;
    --card-bg: rgba(255, 255, 255, 0.7);
    --light-color: #f6f9ff;
    --border-color: rgba(200, 200, 200, 0.5);
    --header-bg: linear-gradient(145deg, #6e56cf 0%, #a855f7 100%);
    --header-text: #ffffff;
}

.dark-theme {
    --background-color: linear-gradient(145deg, #1e1e2e 0%, #2a2a3e 100%);
    --text-color: #e0e7ff;
    --card-bg: rgba(30, 30, 46, 0.7);
    --light-color: #2a2a3e;
    --border-color: rgba(100, 100, 100, 0.5);
    --header-bg: linear-gradient(145deg, #4b3cbf 0%, #7c3aed 100%);
    --header-text: #e0e7ff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background: var(--background-color);
    color: var(--secondary-color); /* Fixed the 'color' property */
    line-height: 1.7;
    min-height: 100vh;
    transition: var(--transition);
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
}

.app-header {
    text-align: center;
    margin-bottom: 50px;
    padding: 30px;
    background: var(--header-bg);
    color: var(--header-text);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.2), transparent 70%);
    opacity: 0.3;
    z-index: 1;
}

.app-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    position: relative;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.app-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    position: relative;
    margin-bottom: 20px;
    z-index: 2;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    color: var(--header-text);
    border: 2px solid var(--secondary-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 3;
}

#theme-toggle i {
    font-size: 1.2rem;
}

#theme-toggle:hover,
#theme-toggle:show {
    background: var(--secondary-color);
    color: #1e2a44;
    box-shadow: 0 0 15px rgba(0, 221, 235, 0.5);
    transform: scale(1.1);
    outline: none;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    color: var(--header-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    transition: var(--transition);
    border: 2px solid var(--secondary-color);
    cursor: pointer;
    pointer-events: auto;
}

.social-link:hover,
.social-link:focus {
    background: var(--secondary-color);
    color: #1e2a44;
    transform: scale(1.2);
    box-shadow: 0 0 12px rgba(0, 221, 235, 0.6);
    outline: none;
}

.app-body {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    align-items: start;
}

.preview-panel {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.preview-panel:hover {
    transform: translateY(-5px);
}

.qr-container {
    position: relative;
    background: linear-gradient(145deg, #ffffff, #f0f4ff);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 280px;
}

#qr-code {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

#qr-code.loaded {
    opacity: 1;
    transform: scale(1);
}

#qr-code canvas, #qr-code img {
    max-width: 100%;
    height: auto;
    border: 3px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.qr-loading {
    display: none;
    position: absolute;
    font-size: 1.1rem;
    color: var(--secondary-color);
    font-weight: 600;
    animation: pulse 1.5s infinite;
}

.qr-loading.active {
    display: block;
}

.qr-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    padding: 20px;
    border-radius: var(--border-radius);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.stat {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    font-size: 0.95rem;
}

.stat-label {
    font-weight: 600;
    color: var(--secondary-color);
}

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

.control-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.main-controls, .sidebar {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.main-controls:hover, .sidebar:hover {
    transform: translateY(-5px);
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.input-group textarea,
.input-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 0.95rem;
    transition: var(--transition);
}

.input-group textarea {
    min-height: 100px;
    resize: vertical;
}

.input-group textarea:focus,
.input-group select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 8px rgba(0, 221, 235, 0.3);
    outline: none;
}

.char-counter {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.char-counter.warning {
    color: var(--accent-color);
    font-weight: 600;
}

.settings-group {
    margin-bottom: 25px;
}

.settings-group h2 {
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--secondary-color);
    color: var(--text-color);
    font-size: 1.4rem;
    font-weight: 700;
}

.setting {
    margin-bottom: 20px;
    position: relative;
}

.setting label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.setting input[type="color"] {
    width: 100%;
    height: 40px;
    border: none;
    background: var(--glass-bg);
    cursor: pointer;
    border-radius: 8px;
}

.setting input[type="range"] {
    width: calc(100% - 60px);
    vertical-align: middle;
    accent-color: var(--secondary-color);
}

.setting input[type="file"],
.setting select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 0.95rem;
}

.setting input[type="checkbox"] {
    margin-right: 10px;
    accent-color: var(--secondary-color);
}

.tooltip {
    display: none;
    position: absolute;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    top: 100%;
    left: 0;
    transform: translateY(5px);
}

.setting:hover .tooltip {
    display: block;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 25px;
}

.btn-primary, .btn-secondary, .btn-tertiary {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1rem;
    box-shadow: var(--box-shadow);
}

.btn-primary {
    background: linear-gradient(145deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(110, 86, 207, 0.4);
    outline: none;
}

.btn-secondary {
    background: linear-gradient(145deg, #3b82f6, #60a5fa);
    color: #ffffff;
}

.btn-secondary:hover,
.btn-secondary:focus {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    outline: none;
}

.btn-tertiary {
    background: var(--glass-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-tertiary:hover,
.btn-tertiary:focus {
    background: var(--secondary-color);
    color: #1e2a44;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 221, 235, 0.4);
    outline: none;
}

.app-footer {
    text-align: center;
    padding: 25px;
    color: var(--secondary-color);
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.footer-link:hover,
.footer-link:focus {
    color: var(--accent-color);
    text-decoration: underline;
    outline: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: var(--box-shadow);
    backdrop-filter: blur(10px);
    z-index: 1000;
    opacity: 0;
    transform: translateX(100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
    max-width: 300px;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-success {
    background: linear-gradient(145deg, var(--success-color), #34d399);
}

.notification-error {
    background: linear-gradient(145deg, var(--error-color), #f87171);
}

.notification-info {
    background: linear-gradient(145deg, var(--info-color), #60a5fa);
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

@media (max-width: 900px) {
    .app-body {
        grid-template-columns: 1fr;
    }

    .main-controls, .sidebar {
        width: 100%;
    }

    .notification {
        max-width: 90%;
        right: 10px;
    }
}

@media (max-width: 768px) {
    .app-header h1 {
        font-size: 2rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-primary, .btn-secondary, .btn-tertiary {
        width: 100%;
        margin-bottom: 15px;
    }

    #theme-toggle {
        top: 15px;
        right: 15px;
        width: 36px;
        height: 36px;
    }

    #theme-toggle i {
        font-size: 1.1rem;
    }

    .social-links {
        flex-direction: column;
        gapeqn: 12px;
    }

    .social-link {
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
        border: 1px solid var(--secondary-color);
    }

    .qr-container {
        min-height: 220px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 15px;
    }

    .app-header {
        padding: 20px;
    }

    .preview-panel, .main-controls, .sidebar {
        padding: 20px;
    }

    .qr-stats {
        grid-template-columns: 1fr;
    }

    .notification {
        top: 10px;
        right: 10px;
        padding: 10px 15px;
        font-size: 0.9rem;
    }

    #theme-toggle {
        width: 32px;
        height: 32px;
    }

    #theme-toggle i {
        font-size: 1rem;
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: 1.3rem;
    }
}