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

:root {
    --primary-color: #1DA1F2;
    --success-color: #17bf63;
    --secondary-color: #657786;
    --bg-color: #0f1419;
    --card-bg: #192734;
    --text-primary: #e7e9ea;
    --text-secondary: #8b98a5;
    --border-color: #38444d;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f1419 0%, #1a2332 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.main-content {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 30px;
    margin-bottom: 60px;
    align-items: start;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .controls-panel {
        max-height: none;
        position: static;
    }

    .preview-panel {
        position: static;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .controls-panel, .preview-panel {
        padding: 20px;
        border-radius: 15px;
    }

    .canvas-wrapper {
        padding: 10px;
    }

    #achievement-canvas {
        max-width: 100%;
        height: auto;
    }

    .templates-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }

    .template-card {
        padding: 20px 15px;
    }

    .template-icon {
        font-size: 2.5rem;
    }

    .template-card h3 {
        font-size: 1rem;
    }

    .template-card p {
        font-size: 0.85rem;
    }

    .preview-info {
        flex-direction: column;
        gap: 10px;
    }

    .preview-info p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.75rem;
    }

    header p {
        font-size: 0.95rem;
    }

    .controls-panel, .preview-panel {
        padding: 15px;
    }

    .control-group label {
        font-size: 0.85rem;
    }

    .control-group input[type="text"],
    .control-group select {
        font-size: 0.9rem;
        padding: 8px 12px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 0.95rem;
    }

    .templates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .template-card {
        padding: 15px 10px;
    }

    .template-icon {
        font-size: 2rem;
    }

    .template-card h3 {
        font-size: 0.9rem;
    }

    .template-card p {
        font-size: 0.8rem;
    }

    .format-selector {
        grid-template-columns: 1fr;
    }
}

.controls-panel {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 25px;
    border: 1px solid var(--border-color);
    height: fit-content;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-height: calc(100vh - 180px);
    overflow-y: auto;
    position: sticky;
    top: 20px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.control-group input[type="text"],
.control-group select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.control-group input[type="color"] {
    width: 100%;
    height: 45px;
    padding: 5px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 10px;
}

.control-group input[type="color"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(29, 161, 242, 0.1);
}

.control-group input[type="text"]:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(29, 161, 242, 0.1);
}

.control-group input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--bg-color);
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: 8px;
    vertical-align: middle;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
    margin-top: -6px;
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
}

.control-group input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
}

.control-group input[type="range"]::-moz-range-track {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 30px;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(23, 191, 99, 0.4);
}

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

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(101, 119, 134, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, #1DA1F2 0%, #0088CC 100%);
    color: white;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(29, 161, 242, 0.4);
}

.preview-panel {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 20px;
}

.canvas-wrapper {
    background: var(--bg-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

#achievement-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.preview-info {
    display: flex;
    justify-content: space-around;
    gap: 20px;
}

.preview-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.templates-section {
    margin-bottom: 60px;
}

.templates-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: var(--text-primary);
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.template-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.template-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(29, 161, 242, 0.2);
}

.template-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.template-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.template-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

footer {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* Loading animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.generating {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Success feedback */
@keyframes successPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(23, 191, 99, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(23, 191, 99, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(23, 191, 99, 0);
    }
}

.success-feedback {
    animation: successPulse 0.6s ease-out;
}

/* Format selector */
.format-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.format-option {
    display: flex;
    align-items: center;
    padding: 12px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.format-option:hover {
    border-color: var(--primary-color);
}

.format-option input[type="radio"] {
    margin-right: 10px;
}

.format-option input[type="radio"]:checked + .format-label {
    color: var(--primary-color);
}

.format-label {
    display: flex;
    flex-direction: column;
}

.format-label strong {
    font-size: 1rem;
}

.format-label small {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Progress bar */
.progress-container {
    margin-top: 15px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 10px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

#progress-percent {
    color: var(--text-primary);
    font-weight: 600;
}

/* Button disabled state */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Custom scrollbar for controls panel */
.controls-panel::-webkit-scrollbar {
    width: 8px;
}

.controls-panel::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 4px;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Custom colors section styling */
#custom-colors {
    padding: 15px;
    background: var(--bg-color);
    border-radius: 10px;
    margin-top: 10px;
}

#custom-colors label {
    margin-top: 10px;
    margin-bottom: 5px;
    font-size: 0.85rem;
}

#custom-colors label:first-child {
    margin-top: 0;
}