:root {
    --primary-color: #FF9F1C;
    --primary-hover: #E0850B;
    --secondary-color: #2EC4B6;
    --background-color: #f8f9fa;
    --container-bg: #ffffff;
    --text-color: #2d3436;
    --text-muted: #636e72;
    --border-color: #e9ecef;
    --focus-ring: rgba(255, 159, 28, 0.25);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
    --radius-md: 12px;
    --radius-lg: 16px;
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    width: 100%;
    max-width: 480px;
    transition: transform 0.3s ease;
}

h1 {
    margin-top: 0;
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.8rem;
    letter-spacing: -0.5px;
    margin-bottom: 10px;
}

h1 span {
    color: var(--primary-color);
}

p {
    color: var(--text-muted);
    margin-bottom: 30px;
    font-size: 1rem;
    line-height: 1.5;
}

.input-group {
    display: flex;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 24px;
    transition: all 0.2s ease-in-out;
    background: #fff;
}

.input-group:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--focus-ring);
}

.static-url {
    background-color: #f1f3f5;
    padding: 14px 16px;
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
    border-right: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

#uriInput {
    flex-grow: 1;
    border: none;
    padding: 14px;
    font-size: 1rem;
    outline: none;
    color: var(--text-color);
    font-weight: 500;
}

#uriInput::placeholder {
    color: #adb5bd;
}

.color-options {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 15px;
}

.color-picker-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.color-picker-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-wrapper {
    position: relative;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
}

.color-wrapper:hover {
    transform: scale(1.1);
}

.color-picker-group input[type="color"] {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
}

.contrast-warning {
    font-size: 0.85rem;
    color: #e67e22;
    background: #fff3e0;
    padding: 8px 12px;
    border-radius: 8px;
    display: inline-block;
    margin-top: 10px;
    margin-bottom: 25px;
}

button {
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    box-shadow: 0 4px 15px rgba(255, 159, 28, 0.3);
}

button:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 159, 28, 0.4);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:disabled {
    background-color: #ffd8a8;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.qr-code-container {
    margin-top: 40px;
    min-height: 280px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 2px dashed var(--border-color);
    transition: border-color 0.3s;
}

.qr-code-container.has-code {
    border-style: solid;
    border-color: transparent;
    box-shadow: var(--shadow-sm);
}

#qrCodeContainer canvas {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.placeholder {
    color: #adb5bd;
    font-weight: 500;
}

.download-options {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.4s forwards;
}

.download-btn {
    background-color: var(--container-bg);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    padding: 12px;
    font-weight: 600;
    box-shadow: none;
}

.download-btn:hover {
    border-color: var(--text-muted);
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

#copyLinkBtn {
    background-color: var(--container-bg);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    padding: 12px;
    font-weight: 600;
    box-shadow: none;
}

#copyLinkBtn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: rgba(255, 159, 28, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.hidden {
    display: none !important;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
    }

    .color-options {
        gap: 20px;
    }

    h1 {
        font-size: 1.5rem;
    }
}