:root {
    --bg-start: #03071c;
    --bg-end: #0b1234;
    --accent: #6c63ff;
    --accent-secondary: #8e54e9;
    --text-primary: #f5f6ff;
    --text-muted: #b5b8d3;
    --glass-bg: rgba(13, 16, 40, 0.6);
    --glass-border: rgba(255, 255, 255, 0.15);
    --shadow-soft: 0 20px 60px rgba(10, 8, 35, 0.55);
    --shadow-card: 0 10px 30px rgba(8, 12, 40, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Poppins", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, rgba(108, 99, 255, 0.15), transparent 40%),
        radial-gradient(circle at bottom, rgba(142, 84, 233, 0.2), transparent 45%),
        linear-gradient(135deg, var(--bg-start), var(--bg-end));
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

main {
    padding: 6rem clamp(1rem, 6vw, 6rem) 4rem;
}

.hero-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem clamp(1rem, 5vw, 4rem);
    background: rgba(7, 9, 28, 0.7);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px rgba(4, 5, 15, 0.45);
}

.logo {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.hero-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
    padding: clamp(2rem, 4vw, 4rem);
    margin-top: 4rem;
    border-radius: 32px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.15), rgba(142, 84, 233, 0.1));
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.hero-section::before,
.hero-section::after {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.35), transparent);
    filter: blur(6px);
    z-index: 0;
}

.hero-section::before {
    top: -80px;
    right: -40px;
}

.hero-section::after {
    bottom: -120px;
    left: -80px;
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeSlide 1.1s ease forwards;
}

.hero-kicker {
    font-size: 0.95rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.8rem);
    margin: 0 0 1rem;
    line-height: 1.15;
}

.hero-subtitle {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.hero-visual {
    position: relative;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.glow-orb {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(142, 84, 233, 0.5), transparent);
    filter: blur(6px);
    animation: float 6s ease-in-out infinite;
}

.orb-one {
    top: 10%;
    right: 15%;
}

.orb-two {
    bottom: 5%;
    left: 10%;
    animation-delay: 1.5s;
}

.glass-panel {
    width: min(320px, 90%);
    padding: 1.75rem;
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(25px);
    box-shadow: var(--shadow-card);
    animation: pulse 4s ease-in-out infinite;
}
.panel-label {
    margin: 0 0 1rem;
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.panel-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.85rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.panel-item:first-of-type {
    border-top: none;
    padding-top: 0;
}

.panel-icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(183, 33, 255, 0.2), rgba(33, 212, 253, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #ffffff;
}

.panel-title {
    margin: 0;
    font-weight: 600;
}

.panel-text {
    margin: 0.2rem 0 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.primary-btn {
    border: none;
    cursor: pointer;
    padding: 0.9rem 1.8rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 1rem;
    color: #0b1234;
    background: linear-gradient(135deg, #b721ff, #21d4fd);
    box-shadow: 0 10px 25px rgba(39, 102, 255, 0.45);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.primary-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    box-shadow: none;
}

.primary-btn::after {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    transition: width 0.4s ease, height 0.4s ease;
}

.primary-btn.ripple::after,
.primary-btn:active::after {
    width: 220px;
    height: 220px;
}

.primary-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 15px 30px rgba(39, 102, 255, 0.55);
}

.prompt-section {
    margin-top: 5rem;
    display: flex;
    justify-content: center;
}

.prompt-card {
    width: min(900px, 100%);
    padding: clamp(1.5rem, 4vw, 3rem);
    border-radius: 30px;
    background: rgba(6, 10, 30, 0.85);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(25px);
    box-shadow: var(--shadow-soft);
}

.prompt-card-header h2 {
    margin: 0;
    font-size: 2rem;
}

.prompt-card-header p {
    margin-top: 0.4rem;
    color: var(--text-muted);
}

textarea {
    width: 100%;
    min-height: 150px;
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    background: rgba(8, 12, 40, 0.75);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    font-family: inherit;
    transition: border 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: rgba(108, 99, 255, 0.6);
}

.input-row {
    margin-top: 1.5rem;
}

.auto-category-panel {
    flex: 1;
    min-width: 280px;
    padding: 1.25rem;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: linear-gradient(135deg, rgba(10, 13, 40, 0.85), rgba(33, 212, 253, 0.08));
    box-shadow: inset 0 0 35px rgba(33, 212, 253, 0.08);
    position: relative;
    overflow: hidden;
}

.auto-category-panel::after {
    content: "";
    position: absolute;
    inset: 12px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.category-panel-label {
    margin: 0 0 0.4rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.category-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.8rem 1.3rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(6, 10, 30, 0.9);
    box-shadow: 0 10px 25px rgba(19, 28, 72, 0.6);
    font-size: 1rem;
    font-weight: 600;
    color: #fdf4ff;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.category-chip.shuffling {
    transform: scale(1.05);
    box-shadow: 0 20px 35px rgba(33, 212, 253, 0.4);
}

.category-glow {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle, #21d4fd, rgba(33, 212, 253, 0));
    animation: categoryPulse 1.4s ease-in-out infinite;
    flex-shrink: 0;
}

.category-name {
    white-space: nowrap;
    max-width: 100%;
}

.category-panel-hint {
    margin: 0.75rem 0 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    opacity: 0.9;
}

.generate-btn {
    width: 100%;
    margin-top: 1.15rem;
    min-height: 52px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at 20% 20%, rgba(33, 212, 253, 0.18), rgba(10, 13, 40, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text-primary);
    box-shadow: inset 0 0 35px rgba(33, 212, 253, 0.12), 0 18px 35px rgba(3, 5, 20, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background-image: none;
}

.generate-btn::after {
    display: none;
}

.generate-btn:hover {
    box-shadow: inset 0 0 45px rgba(33, 212, 253, 0.22), 0 22px 40px rgba(3, 5, 20, 0.8);
    border-color: rgba(255, 255, 255, 0.32);
}

.prompt-output {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 20px;
    background: rgba(5, 8, 26, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 120px;
    color: var(--text-muted);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0.85;
}

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

.copy-btn {
    margin-top: 0.85rem;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.2rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(3, 6, 22, 0.85);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: border 0.25s ease, transform 0.15s ease;
}

.copy-btn:hover {
    border-color: rgba(33, 212, 253, 0.45);
}

.copy-btn:active {
    transform: translateY(1px);
}

.copy-label {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.82rem;
}

.copy-status {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.features-section {
    margin-top: 6rem;
}

.section-heading {
    text-align: center;
    margin-bottom: 3rem;
}

.section-kicker {
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.section-heading h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0.75rem 0 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    padding: 2rem 1.5rem;
    border-radius: 24px;
    background: rgba(8, 11, 32, 0.85);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(108, 99, 255, 0.5);
    box-shadow: 0 18px 35px rgba(10, 8, 35, 0.6);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.3), rgba(142, 84, 233, 0.25));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.feature-icon i {
    color: var(--text-primary);
}

.feature-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.2rem;
}

.feature-card p {
    margin: 0;
    color: var(--text-muted);
}

.site-footer {
    padding: 1.5rem clamp(1rem, 5vw, 4rem);
    background: rgba(4, 6, 20, 0.9);
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 5rem;
}

.footer-icons a {
    color: var(--text-muted);
    font-size: 1.4rem;
    margin-right: 1rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.footer-icons a:last-child {
    margin-right: 0;
}

.footer-icons a:hover {
    color: #21d4fd;
    transform: translateY(-2px);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

@keyframes float {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(0.97);
    }
    50% {
        transform: scale(1.03);
    }
    100% {
        transform: scale(0.97);
    }
}

@keyframes categoryPulse {
    0% {
        transform: scale(0.9);
        opacity: 0.65;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
    }
    100% {
        transform: scale(0.9);
        opacity: 0.65;
    }
}

@media (max-width: 768px) {
    .hero-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .input-row {
        display: flex;
        flex-direction: column;
    }

    .auto-category-panel,
    .primary-btn {
        width: 100%;
        text-align: center;
    }
}