/**
 * Google Drive Downloader - Modern Frontend Styles
 * Beautiful, responsive design with animations
 */

/* Reset and base styles */
.gdd-downloader-container {
    --gdd-primary: #4f46e5;
    --gdd-primary-dark: #3730a3;
    --gdd-secondary: #06b6d4;
    --gdd-success: #10b981;
    --gdd-error: #ef4444;
    --gdd-warning: #f59e0b;
    --gdd-gray-50: #f9fafb;
    --gdd-gray-100: #f3f4f6;
    --gdd-gray-200: #e5e7eb;
    --gdd-gray-300: #d1d5db;
    --gdd-gray-400: #9ca3af;
    --gdd-gray-500: #6b7280;
    --gdd-gray-600: #4b5563;
    --gdd-gray-700: #374151;
    --gdd-gray-800: #1f2937;
    --gdd-gray-900: #111827;
    
    --gdd-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --gdd-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --gdd-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --gdd-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gdd-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --gdd-border-radius: 12px;
    --gdd-border-radius-lg: 16px;
    --gdd-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    position: relative;
    max-width: 500px;
    margin: 2rem auto;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--gdd-gray-800);
}

/* Main form container */
.gdd-downloader-form {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: var(--gdd-border-radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--gdd-shadow-xl);
    border: 1px solid var(--gdd-gray-200);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: var(--gdd-transition);
}

.gdd-downloader-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--gdd-primary), var(--gdd-secondary), var(--gdd-primary));
    background-size: 200% 100%;
    animation: gdd-gradient-shift 3s ease-in-out infinite;
}

@keyframes gdd-gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.gdd-downloader-form:hover {
    transform: translateY(-2px);
    box-shadow: var(--gdd-shadow-xl), 0 0 0 1px rgba(79, 70, 229, 0.1);
}

/* Header section */
.gdd-header {
    text-align: center;
    margin-bottom: 2rem;
}

.gdd-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gdd-gray-900);
    margin: 0 0 0.5rem 0;
    background: linear-gradient(135deg, var(--gdd-primary), var(--gdd-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gdd-description {
    color: var(--gdd-gray-600);
    margin: 0;
    font-size: 1rem;
}

/* Form styles */
.gdd-form {
    margin-bottom: 1.5rem;
}

.gdd-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.gdd-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.gdd-input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gdd-gray-400);
    z-index: 2;
    transition: var(--gdd-transition);
    pointer-events: none;
}

.gdd-url-input {
    width: 100%;
    height: 60px;
    padding: 0 1.25rem 0 3.5rem;
    border: 2px solid var(--gdd-gray-200);
    border-radius: var(--gdd-border-radius);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.8);
    transition: var(--gdd-transition);
    outline: none;
    position: relative;
    backdrop-filter: blur(5px);
}

.gdd-url-input::placeholder {
    color: var(--gdd-gray-400);
    font-weight: 400;
}

.gdd-url-input:focus {
    border-color: var(--gdd-primary);
    background: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1), var(--gdd-shadow-lg);
}

.gdd-url-input:focus + .gdd-input-border {
    transform: scaleX(1);
}

.gdd-url-input:focus ~ .gdd-input-icon {
    color: var(--gdd-primary);
    transform: translateY(-50%) scale(1.1);
}

.gdd-input-border {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gdd-primary), var(--gdd-secondary));
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
    border-radius: 1px;
}

/* Submit button */
.gdd-submit-button {
    width: 100%;
    height: 60px;
    background: linear-gradient(135deg, var(--gdd-primary) 0%, var(--gdd-primary-dark) 100%);
    border: none;
    border-radius: var(--gdd-border-radius);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--gdd-transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--gdd-shadow-md);
}

.gdd-submit-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.gdd-submit-button:hover::before {
    left: 100%;
}

.gdd-submit-button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--gdd-shadow-xl);
    background: linear-gradient(135deg, var(--gdd-primary-dark) 0%, var(--gdd-primary) 100%);
}

.gdd-submit-button:active {
    transform: translateY(0) scale(1);
}

.gdd-submit-button:disabled {
    cursor: not-allowed;
    opacity: 0.7;
    transform: none;
}

.gdd-button-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--gdd-transition);
}

.gdd-button-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--gdd-transition);
}

.gdd-submit-button.loading .gdd-button-content {
    opacity: 0;
}

.gdd-submit-button.loading .gdd-button-loading {
    opacity: 1;
}

.gdd-button-icon {
    transition: var(--gdd-transition);
}

.gdd-submit-button:hover .gdd-button-icon {
    transform: translateY(-1px);
}

/* Spinner animation */
.gdd-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: gdd-spin 1s linear infinite;
}

@keyframes gdd-spin {
    to { transform: rotate(360deg); }
}

/* Status container */
.gdd-status-container {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--gdd-border-radius);
    padding: 2rem 1.5rem;
    margin-top: 1.5rem;
    text-align: center;
    animation: gdd-fade-in 0.3s ease;
}

.gdd-progress-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.gdd-progress-track {
    width: 100%;
    height: 6px;
    background: var(--gdd-gray-200);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.gdd-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gdd-primary), var(--gdd-secondary));
    border-radius: 3px;
    width: 0%;
    transition: width 0.3s ease;
    position: relative;
}

.gdd-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: gdd-shimmer 2s infinite;
}

@keyframes gdd-shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.gdd-status-text {
    color: var(--gdd-primary-dark);
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0;
    animation: gdd-pulse 2s infinite;
}

@keyframes gdd-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Success result */
.gdd-result-container {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border: 1px solid #86efac;
    border-radius: var(--gdd-border-radius);
    padding: 2.5rem 1.5rem;
    margin-top: 1.5rem;
    text-align: center;
    animation: gdd-success-pop 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes gdd-success-pop {
    0% { 
        opacity: 0; 
        transform: scale(0.8) translateY(20px);
    }
    100% { 
        opacity: 1; 
        transform: scale(1) translateY(0);
    }
}

.gdd-success-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.gdd-success-icon {
    color: var(--gdd-success);
    animation: gdd-check-draw 0.8s ease 0.3s both;
}

@keyframes gdd-check-draw {
    0% { 
        transform: scale(0);
        opacity: 0;
    }
    50% { 
        transform: scale(1.2);
        opacity: 1;
    }
    100% { 
        transform: scale(1);
    }
}

.gdd-success-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gdd-gray-900);
    margin: 0;
}

.gdd-success-subtitle {
    color: var(--gdd-gray-600);
    margin: 0;
    font-size: 1rem;
}

.gdd-download-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--gdd-success) 0%, #059669 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--gdd-border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--gdd-transition);
    box-shadow: var(--gdd-shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gdd-download-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--gdd-shadow-xl);
    color: white;
    text-decoration: none;
}

.gdd-download-button:active {
    transform: translateY(0) scale(1);
}

.gdd-new-download {
    background: transparent;
    border: 2px solid var(--gdd-gray-300);
    color: var(--gdd-gray-600);
    padding: 0.75rem 1.5rem;
    border-radius: var(--gdd-border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--gdd-transition);
}

.gdd-new-download:hover {
    border-color: var(--gdd-primary);
    color: var(--gdd-primary);
    transform: translateY(-1px);
}

/* Error container */
.gdd-error-container {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border: 1px solid #fca5a5;
    border-radius: var(--gdd-border-radius);
    padding: 2rem 1.5rem;
    margin-top: 1.5rem;
    text-align: center;
    animation: gdd-shake 0.5s ease;
}

@keyframes gdd-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.gdd-error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.gdd-error-icon {
    color: var(--gdd-error);
}

.gdd-error-message {
    color: var(--gdd-error);
    font-weight: 600;
    font-size: 1rem;
}

.gdd-retry-button {
    background: var(--gdd-error);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--gdd-border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--gdd-transition);
}

.gdd-retry-button:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* Floating particles background */
.gdd-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    border-radius: var(--gdd-border-radius-lg);
}

.gdd-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--gdd-primary);
    border-radius: 50%;
    opacity: 0.1;
    animation: gdd-float 6s infinite ease-in-out;
}

.gdd-particle:nth-child(1) {
    left: 20%;
    animation-delay: 0s;
    animation-duration: 6s;
}

.gdd-particle:nth-child(2) {
    left: 40%;
    animation-delay: 1s;
    animation-duration: 8s;
}

.gdd-particle:nth-child(3) {
    left: 60%;
    animation-delay: 2s;
    animation-duration: 7s;
}

.gdd-particle:nth-child(4) {
    left: 80%;
    animation-delay: 3s;
    animation-duration: 9s;
}

.gdd-particle:nth-child(5) {
    left: 90%;
    animation-delay: 4s;
    animation-duration: 5s;
}

@keyframes gdd-float {
    0%, 100% {
        transform: translateY(100vh) translateX(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    90% {
        opacity: 0.1;
    }
    50% {
        transform: translateY(50vh) translateX(20px) rotate(180deg);
        opacity: 0.3;
    }
}

/* Fade in animation */
@keyframes gdd-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive design */
@media (max-width: 640px) {
    .gdd-downloader-container {
        margin: 1rem;
        max-width: none;
    }
    
    .gdd-downloader-form {
        padding: 2rem 1.5rem;
        border-radius: var(--gdd-border-radius);
    }
    
    .gdd-title {
        font-size: 1.5rem;
    }
    
    .gdd-url-input,
    .gdd-submit-button {
        height: 56px;
        font-size: 1rem;
    }
    
    .gdd-input-wrapper {
        gap: 1rem;
    }
    
    .gdd-status-container,
    .gdd-result-container,
    .gdd-error-container {
        padding: 1.5rem 1rem;
    }
    
    .gdd-success-title {
        font-size: 1.25rem;
    }
    
    .gdd-download-button {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .gdd-downloader-container {
        margin: 0.5rem;
    }
    
    .gdd-downloader-form {
        padding: 1.5rem 1rem;
    }
    
    .gdd-title {
        font-size: 1.25rem;
    }
    
    .gdd-url-input {
        padding-left: 3rem;
        font-size: 0.9rem;
    }
    
    .gdd-input-icon {
        left: 0.75rem;
    }
    
    .gdd-submit-button {
        font-size: 0.9rem;
        height: 52px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .gdd-downloader-container {
        --gdd-gray-50: #1f2937;
        --gdd-gray-100: #374151;
        --gdd-gray-200: #4b5563;
        --gdd-gray-300: #6b7280;
        --gdd-gray-400: #9ca3af;
        --gdd-gray-500: #d1d5db;
        --gdd-gray-600: #e5e7eb;
        --gdd-gray-700: #f3f4f6;
        --gdd-gray-800: #f9fafb;
        --gdd-gray-900: #ffffff;
    }
    
    .gdd-downloader-form {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
        border-color: var(--gdd-gray-600);
    }
    
    .gdd-url-input {
        background: rgba(31, 41, 55, 0.8);
        border-color: var(--gdd-gray-600);
        color: var(--gdd-gray-200);
    }
    
    .gdd-url-input:focus {
        background: #1f2937;
    }
    
    .gdd-status-container {
        background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
        border-color: #3b82f6;
    }
    
    .gdd-result-container {
        background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
        border-color: #10b981;
    }
    
    .gdd-error-container {
        background: linear-gradient(135deg, #7f1d1d 0%, #991b1b 100%);
        border-color: #ef4444;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .gdd-downloader-form {
        border: 2px solid var(--gdd-gray-900);
    }
    
    .gdd-url-input {
        border: 2px solid var(--gdd-gray-900);
    }
    
    .gdd-submit-button {
        border: 2px solid var(--gdd-gray-900);
    }
}

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