/* ============================================
   AI PROMPT GENERATOR - STYLESHEET
   Modern, clean, AI/tech aesthetic design
   ============================================ */

/* ----- CSS Custom Properties (Design Tokens) ----- */
:root {
    /* Primary Colors - Vibrant AI/Tech Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* Background Colors */
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Border & Shadow */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(102, 126, 234, 0.5);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Typography */
    --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
}

/* ----- CSS Reset & Base Styles ----- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ----- Background Animation ----- */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

/* Floating gradient orbs for ambient effect */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-gradient);
    top: -20%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary-gradient);
    top: 50%;
    right: -15%;
    animation-delay: -7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: var(--accent-gradient);
    bottom: -10%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

/* ----- Main Container ----- */
.container {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ----- Header Section ----- */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    font-size: var(--font-size-3xl);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.tagline {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* ----- Generator Card (Glassmorphism) ----- */
.generator-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-card);
    transition: var(--transition-normal);
}

.generator-card:hover {
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow);
}

/* ----- Input Groups ----- */
.input-group {
    margin-bottom: var(--spacing-md);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.label-icon {
    font-size: var(--font-size-base);
}

/* ----- Text Input / Textarea ----- */
.text-input {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-size-base);
    resize: vertical;
    min-height: 100px;
    transition: var(--transition-normal);
}

.text-input::placeholder {
    color: var(--text-muted);
}

.text-input:focus {
    outline: none;
    border-color: var(--border-glow);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

/* ----- Select Dropdown ----- */
.select-wrapper {
    position: relative;
}

.select-input {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-size-base);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: var(--transition-normal);
}

.select-input:focus {
    outline: none;
    border-color: var(--border-glow);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.select-input option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-sm);
}

.select-arrow {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

.select-wrapper:hover .select-arrow {
    color: var(--text-secondary);
}

/* ----- Options Grid (2-column layout) ----- */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.options-grid .input-group {
    margin-bottom: 0;
}

/* ----- Generate Button ----- */
.generate-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-top: var(--spacing-sm);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.generate-btn::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: var(--transition-slow);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px rgba(102, 126, 234, 0.5);
}

.generate-btn:hover::before {
    left: 100%;
}

.generate-btn:active {
    transform: translateY(0);
}

/* Button loading state */
.generate-btn.loading .btn-icon,
.generate-btn.loading .btn-text {
    opacity: 0;
}

.generate-btn.loading .btn-loader {
    display: block;
}

.btn-loader {
    display: none;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: absolute;
}

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

/* ----- Output Section ----- */
.output-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.5s ease;
}

.output-section.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.output-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.output-icon {
    font-size: var(--font-size-xl);
}

/* ----- Copy Button ----- */
.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    border-color: var(--border-glow);
}

.copy-btn.copied {
    background: rgba(34, 197, 94, 0.2);
    border-color: rgba(34, 197, 94, 0.5);
    color: #22c55e;
}

/* ----- Output Area ----- */
.output-area {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 150px;
    position: relative;
    overflow: hidden;
}

/* Typing animation effect */
.output-area.typing::after {
    content: '|';
    animation: blink 0.7s infinite;
    color: #667eea;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

/* ----- Footer ----- */
.footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.heart {
    color: #f5576c;
    animation: heartbeat 1.5s ease infinite;
    display: inline-block;
}

@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

/* ----- Toast Notification ----- */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--primary-gradient);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 1000;
}

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

.toast-icon {
    font-size: var(--font-size-lg);
}

/* ============================================
   RESPONSIVE DESIGN - Mobile First Approach
   ============================================ */

/* Tablets and smaller screens */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .logo h1 {
        font-size: var(--font-size-xl);
    }

    .tagline {
        font-size: var(--font-size-base);
    }

    .generator-card {
        padding: var(--spacing-lg);
    }

    .gradient-orb {
        filter: blur(60px);
    }

    .orb-1 {
        width: 300px;
        height: 300px;
    }

    .orb-2 {
        width: 250px;
        height: 250px;
    }

    .orb-3 {
        width: 200px;
        height: 200px;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }

    .container {
        padding: var(--spacing-sm);
        justify-content: flex-start;
        padding-top: var(--spacing-xl);
    }

    .logo {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .logo-icon {
        font-size: var(--font-size-2xl);
    }

    .logo h1 {
        font-size: var(--font-size-lg);
    }

    .tagline {
        font-size: var(--font-size-sm);
    }

    .generator-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
    }

    .text-input,
    .select-input {
        padding: var(--spacing-sm);
    }

    /* Stack options grid on mobile */
    .options-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .generate-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }

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

    .copy-btn {
        width: 100%;
        justify-content: center;
    }

    .output-area {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

/* Very small screens */
@media (max-width: 360px) {
    .logo h1 {
        font-size: var(--font-size-base);
    }

    .input-label {
        font-size: 0.75rem;
    }
}

/* Accessibility - Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .gradient-orb {
        animation: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: rgba(255, 255, 255, 0.3);
        --text-secondary: rgba(255, 255, 255, 0.9);
    }

    .text-input,
    .select-input {
        border-width: 2px;
    }
}