/* VARIABLES */

:root {
    --color-primary: #8b5cf6;
    --color-primary-light: #c084fc;
    --color-secondary: #6366f1;
    --color-bg-dark: #0b1120;
    --color-bg-darker: #0f172a;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5f1;
    --color-text-muted: #94a3b8;
    --color-text-dimmed: #64748b;
    --color-border: rgba(255,255,255,0.05);
    --color-border-light: rgba(255,255,255,0.06);
    --color-bg-overlay: rgba(25,30,55,0.75);
    --color-bg-overlay-light: rgba(20,25,45,0.75);
    
    --shadow-sm: 0 10px 25px rgba(139,92,246,0.3);
    --shadow-md: 0 15px 40px rgba(139,92,246,0.4);
    --shadow-lg: 0 30px 80px rgba(0,0,0,0.5);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
}

/* RESET */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    color: var(--color-text-primary);
    background:
        radial-gradient(circle at 20% 30%, #3b2c9f 0%, transparent 45%),
        radial-gradient(circle at 80% 70%, #1e40af 0%, transparent 50%),
        linear-gradient(160deg, var(--color-bg-dark) 0%, var(--color-bg-darker) 100%);
    overflow-x: hidden;
    min-height: 100vh;
}

/* BACKGROUND EFFECTS */

/* Vignette effect */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(
        circle at center,
        transparent 55%,
        rgba(0,0,0,0.45)
    );
    z-index: -1;
}

/* Mouse glow effect */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(
            circle 90px at var(--x, 50%) var(--y, 50%),
            rgba(139,92,246,0.18),
            transparent 70%
        );
    transition: background var(--transition-fast) linear;
    z-index: -1;
}

/* LAYOUT */

.app {
    max-width: 960px;
    margin: auto;
    padding: 80px 40px 120px;
    position: relative;
    z-index: 1;
}

/* TOPBAR */

.topbar {
    margin-bottom: 60px;
}

/* BRAND */

.brand {
    margin-bottom: 30px;
}

.brand h1 {
    margin: 0;
    font-size: 44px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(
        90deg,
        var(--color-primary-light),
        var(--color-secondary)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand span {
    color: var(--color-text-muted);
    font-size: 14px;
    display: block;
    margin-top: 6px;
    font-weight: 400;
}

/* STEP INDICATOR */

.step-indicator {
    margin-top: 36px;
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.step {
    padding: 8px 18px;
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--color-border);
    color: var(--color-text-dimmed);
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: default;
}

.step.active {
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-secondary)
    );
    color: white;
    box-shadow: 0 0 30px rgba(139,92,246,0.4);
}

/* INTENT PREVIEW */

.intent-preview {
    margin: 40px 0;
    padding: 18px 22px;
    border-radius: 18px;
    background: var(--color-bg-overlay-light);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(16px);
    font-size: 14px;
    color: var(--color-text-secondary);
    min-height: 24px;
    word-break: break-word;
}

.intent-preview strong {
    color: var(--color-text-primary);
    margin-right: 8px;
    font-weight: 600;
}

.intent-preview span {
    color: var(--color-primary-light);
    font-weight: 500;
}

/* SECTION */

.section {
    background: var(--color-bg-overlay);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(16px);
    border-radius: 26px;
    padding: 38px;
    margin-bottom: 36px;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
    display: none;
}

.section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    box-shadow:
        var(--shadow-lg),
        0 0 40px rgba(139,92,246,0.1);
}

.section.active:hover {
    transform: translateY(-3px);
}

.section h3 {
    margin: 0 0 24px 0;
    color: var(--color-text-primary);
    font-size: 18px;
    font-weight: 700;
}

/* BUBBLE CONTAINER */

.bubble-container {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

/* BUBBLE */

.bubble {
    padding: 12px 24px;
    border-radius: 999px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
    user-select: none;
    white-space: nowrap;
}

.bubble:hover {
    background: rgba(139,92,246,0.18);
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.bubble:active {
    transform: translateY(0);
}

.bubble.selected {
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-secondary)
    );
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
    cursor: default;
}

.bubble.selected:hover {
    transform: none;
}

/* BUTTON */

#generateBtn {
    display: block;
    margin: 50px auto;
    padding: 18px 54px;
    border-radius: 20px;
    border: none;
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-secondary)
    );
    color: white;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

#generateBtn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), 0 0 40px rgba(139,92,246,0.5);
}

#generateBtn:active:not(:disabled) {
    transform: translateY(-1px);
}

#generateBtn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* OUTPUT SECTION */

.output-wrapper {
    margin-top: 40px;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    gap: 16px;
}

.output-title {
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 14px;
}

#copyBtn {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    border-radius: 10px;
    padding: 8px 16px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

#copyBtn:hover {
    background: rgba(139,92,246,0.3);
    color: white;
    border-color: var(--color-primary);
}

#copyBtn:active {
    transform: scale(0.98);
}

/* TEXT_AREA */

textarea {
    width: 100%;
    height: 400px;
    border-radius: 18px;
    border: 1px solid var(--color-border);
    background: rgba(10,15,30,0.85);
    backdrop-filter: blur(14px);
    padding: 24px;
    color: var(--color-text-primary);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    min-height: 300px;
    box-shadow: inset 0 0 30px rgba(0,0,0,0.6);
    transition: all var(--transition-normal);
}

textarea:focus {
    outline: none;
    border-color: rgba(139,92,246,0.5);
    box-shadow:
        inset 0 0 30px rgba(0,0,0,0.6),
        0 0 20px rgba(139,92,246,0.2);
}

textarea::placeholder {
    color: var(--color-text-dimmed);
}

/* NOTIFICATIONS */

.error-notification,
.success-notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    max-width: 90vw;
}

.error-notification {
    background: rgba(239, 68, 68, 0.95);
    color: white;
    border: 1px solid rgba(239, 68, 68, 0.5);
    box-shadow: 0 10px 30px rgba(239, 68, 68, 0.3);
}

.success-notification {
    background: rgba(34, 197, 94, 0.95);
    color: white;
    border: 1px solid rgba(34, 197, 94, 0.5);
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.3);
}

.error-notification.show,
.success-notification.show {
    opacity: 1;
    transform: translateY(0);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* SCROLLBAR STYLING */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.02);
}

::-webkit-scrollbar-thumb {
    background: rgba(139,92,246,0.3);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(139,92,246,0.5);
}

/* RESPONSIVE DESIGN */

@media (max-width: 768px) {
    .app {
        padding: 40px 20px 80px;
    }

    .brand h1 {
        font-size: 32px;
    }

    .step-indicator {
        gap: 12px;
    }

    .step {
        padding: 6px 12px;
        font-size: 11px;
    }

    .section {
        padding: 24px;
        margin-bottom: 24px;
    }

    .section h3 {
        font-size: 16px;
        margin-bottom: 18px;
    }

    .bubble-container {
        gap: 12px;
    }

    .bubble {
        padding: 10px 18px;
        font-size: 13px;
    }

    textarea {
        height: 300px;
        font-size: 13px;
        padding: 16px;
    }

    #generateBtn {
        padding: 14px 40px;
        font-size: 14px;
        margin: 40px auto;
    }

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

    .error-notification,
    .success-notification {
        bottom: 20px;
        right: 20px;
        left: 20px;
        padding: 14px 20px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .app {
        padding: 30px 16px 60px;
    }

    .brand h1 {
        font-size: 24px;
    }

    .brand span {
        font-size: 12px;
    }

    .topbar {
        margin-bottom: 40px;
    }

    .step-indicator {
        gap: 8px;
    }

    .step {
        padding: 4px 10px;
        font-size: 10px;
    }

    .intent-preview {
        padding: 12px 16px;
        font-size: 12px;
    }

    .section {
        padding: 18px;
        margin-bottom: 18px;
        border-radius: 18px;
    }

    .section h3 {
        font-size: 14px;
    }

    .bubble {
        padding: 8px 14px;
        font-size: 12px;
    }

    textarea {
        height: 250px;
        font-size: 12px;
        padding: 12px;
    }

    #generateBtn {
        padding: 12px 32px;
        font-size: 13px;
        margin: 30px auto;
    }

    #copyBtn {
        padding: 6px 12px;
        font-size: 12px;
    }

    .output-title {
        font-size: 12px;
    }

    .error-notification,
    .success-notification {
        bottom: 16px;
        right: 16px;
        left: 16px;
        padding: 12px 16px;
        font-size: 12px;
    }
}

/* PRINT STYLES */

@media print {
    body::before,
    body::after {
        display: none;
    }

    .app {
        padding: 0;
    }

    .topbar,
    .step-indicator,
    #generateBtn,
    #copyBtn {
        display: none;
    }

    textarea {
        border: none;
        box-shadow: none;
        background: white;
        color: black;
    }
}

/* ACCESSIBILITY */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: light) {
    body {
        background: linear-gradient(160deg, #f8fafc 0%, #f1f5f9 100%);
    }

    .bubble,
    .section {
        background: rgba(255,255,255,0.7);
        border-color: rgba(0,0,0,0.1);
    }

    textarea {
        background: rgba(255,255,255,0.95);
        color: #1e293b;
    }

    .bubble:hover {
        background: rgba(139,92,246,0.1);
    }
}