/* CSS Variables for theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --background-dark: #0f0f1a;
    --background-card: #1a1a2e;
    --background-input: #16162a;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #2d2d4a;
    --success-color: #22c55e;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --glow: 0 0 20px rgba(99, 102, 241, 0.3);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Background gradient effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Main Content Sections */
main {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

section {
    background: var(--background-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

textarea,
input[type="text"],
select {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-input);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

textarea:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--glow);
}

textarea::placeholder,
input[type="text"]::placeholder {
    color: var(--text-muted);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

select option {
    background: var(--background-card);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* Model Selector */
.model-selector-container {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.model-selector-container .form-group {
    margin-bottom: 1rem;
}

.model-select {
    font-size: 1.1rem;
    font-weight: 500;
    border-color: var(--primary-color);
}

.model-info {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--background-input);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.model-badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    background: var(--primary-color);
    color: white;
}

.model-badge.midjourney {
    background: linear-gradient(135deg, #ff6b6b, #ee5a5a);
}

.model-badge.chatgpt {
    background: linear-gradient(135deg, #10a37f, #0d8c6d);
}

.model-badge.ideogram {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.model-badge.veo {
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.model-badge.nanobananapro {
    background: linear-gradient(135deg, #ffe135, #f5c800);
    color: #1a1a2e;
}

.model-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

button {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    flex: 1;
    min-width: 200px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--background-input);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.btn-copy {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-copy:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
}

.btn-copy:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Output Section */
.output-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.output-header h2,
.output-header h3 {
    color: var(--text-primary);
}

.output-box {
    background: var(--background-input);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    min-height: 100px;
    font-size: 1.1rem;
    line-height: 1.8;
    word-wrap: break-word;
}

.output-box.small {
    min-height: 60px;
    font-size: 1rem;
}

.output-box .placeholder-text {
    color: var(--text-muted);
    font-style: italic;
}

.output-box .generated-prompt {
    color: var(--text-primary);
}

.negative-output {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Model indicator in output */
.model-indicator {
    margin-bottom: 0.75rem;
}

.model-tip {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.model-tip p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.model-tip strong {
    color: var(--primary-color);
}

/* AI Badge */
.ai-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    margin-left: 0.5rem;
}

.basic-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--text-muted);
    color: white;
    margin-left: 0.5rem;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 1rem;
}

.loading-state p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 0.5rem;
    vertical-align: middle;
}

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

/* Error State */
.error-state {
    padding: 1.5rem;
    text-align: center;
}

.error-message {
    color: #ef4444;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.error-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.error-state .btn-secondary {
    margin-top: 0.5rem;
}

/* Tips Section */
.tips-section h2 {
    margin-bottom: 1.5rem;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tip-card {
    background: var(--background-input);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tip-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.tip-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.tip-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Examples Section */
.examples-section h2 {
    margin-bottom: 1.5rem;
}

.examples-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.example-card {
    background: var(--background-input);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.example-card:hover {
    border-color: var(--secondary-color);
}

.example-card h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.example-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-use {
    background: transparent;
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.generated-prompt {
    animation: fadeIn 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    section {
        padding: 1.5rem;
    }

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

    .button-group {
        flex-direction: column;
    }

    .btn-primary {
        min-width: 100%;
    }

    .output-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .tips-grid,
    .examples-list {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection Styling */
::selection {
    background: var(--primary-color);
    color: white;
}