@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #6366f1;
    --accent-hover: #4f46e5;
    --border-color: #2a2a2a;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0f0f0f 100%);
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
}

/* Modal Popup Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    text-align: center;
}

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

.modal-input:hover {
    border-color: var(--accent-primary);
}

.modal-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    background: var(--bg-primary);
}

.modal-button {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #8b5cf6 100%);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 8px 16px -4px rgba(99, 102, 241, 0.4);
}

.modal-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -6px rgba(99, 102, 241, 0.5);
}

.modal-button:active {
    transform: translateY(0);
}

.modal-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #8b5cf6 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    box-shadow: var(--shadow-md);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.version {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-weight: 500;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.chat-container {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.chat-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.copy-button {
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-button:hover {
    background: var(--bg-primary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.copy-button:active {
    transform: scale(0.95);
}

.copy-button.copied {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.answer {
    flex: 1;
    padding: 2rem;
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-primary);
    background: transparent;
    border: none;
    resize: none;
    overflow-y: auto;
    font-weight: 400;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.answer::-webkit-scrollbar {
    width: 8px;
}

.answer::-webkit-scrollbar-track {
    background: transparent;
}

.answer::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 9999px;
}

.answer::-webkit-scrollbar-thumb:hover {
    background: #3a3a3a;
}

.answer:focus {
    outline: none;
}

/* Placeholder per il div answer */
.answer:empty::before {
    content: attr(data-placeholder);
    color: var(--text-secondary);
}

/* Stili per il markdown */
.answer h1,
.answer h2,
.answer h3,
.answer h4,
.answer h5,
.answer h6 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
}

.answer h1 {
    font-size: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.answer h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.375rem;
}

.answer h3 {
    font-size: 1.25rem;
}

.answer h4 {
    font-size: 1.125rem;
}

.answer p {
    margin-bottom: 1rem;
}

.answer ul,
.answer ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.answer li {
    margin-bottom: 0.375rem;
}

.answer code {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.875rem;
    color: #e879f9;
}

.answer pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.answer pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: var(--text-primary);
}

.answer blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.answer a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.answer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.answer table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.answer th,
.answer td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.answer th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.answer hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.5rem 0;
}

.answer strong {
    font-weight: 600;
}

.answer em {
    font-style: italic;
}

.answer img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
}

.input-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.personality-selector {
    margin-bottom: 1rem;
}

.personality-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.personality-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23a0a0a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 3rem;
}

.personality-select:hover {
    border-color: var(--accent-primary);
    background-color: var(--bg-primary);
}

.personality-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.question-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 400;
    transition: all var(--transition-fast);
}

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

.question-input:hover {
    border-color: var(--accent-primary);
}

.question-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--bg-primary);
}

.submit-button {
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #8b5cf6 100%);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 20px -5px rgba(99, 102, 241, 0.4);
}

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

.submit-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

@media (max-width: 768px) {
    .nav-content {
        padding: 1.25rem 1.5rem;
    }

    .logo-text {
        font-size: 1.125rem;
    }

    .version {
        font-size: 0.6875rem;
    }

    .container {
        padding: 1rem;
        gap: 1rem;
    }

    .chat-container {
        border-radius: var(--radius-md);
    }

    .chat-header {
        padding: 1rem 1.25rem;
    }

    .answer {
        padding: 1.5rem;
        font-size: 0.9375rem;
    }

    .input-container {
        padding: 1.25rem;
        border-radius: var(--radius-md);
    }

    .input-wrapper {
        flex-direction: column;
        gap: 0.75rem;
    }

    .question-input,
    .submit-button {
        width: 100%;
    }

    .submit-button {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .logo-icon {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }

    .logo-text {
        font-size: 1rem;
    }

    .nav-content {
        padding: 1rem;
    }

    .container {
        padding: 0.75rem;
    }

    .chat-header h2 {
        font-size: 0.875rem;
    }

    .answer {
        padding: 1.25rem;
        font-size: 0.875rem;
    }
}