:root {
    --bg-color: #0f172a; /* Slate 900 */
    --surface-color: #1e293b; /* Slate 800 */
    --border-color: #334155; /* Slate 700 */
    --text-primary: #f1f5f9; /* Slate 100 */
    --text-secondary: #94a3b8; /* Slate 400 */

    --accent-color: #3b82f6; /* Blue 500 del sito */
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;

    --glass-bg: rgba(22, 27, 34, 0.7);
    --glass-border: rgba(48, 54, 61, 0.5);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.15);
}

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

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(88, 166, 255, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(35, 134, 54, 0.04) 0%, transparent 50%);
}

.danger-text {
    color: var(--danger-color) !important;
    font-weight: 700 !important;
}

.mirror-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.mirror-btn.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(88, 166, 255, 0.1);
    box-shadow: 0 0 8px rgba(88, 166, 255, 0.25);
}

.app-container {
    width: 100%;
    max-width: 900px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.main-header {
    text-align: center;
    padding: 2rem 0;
    animation: fadeInDown 0.8s ease;
}

.logo-container {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    color: var(--accent-color);
}

h1 {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    text-transform: uppercase;
    color: #cbd5e1; /* Slate 300 per la parte 'Stampi' */
}

h1 span {
    color: var(--accent-color); /* Il Blu per 'ENDO' */
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Common Card Styles */
.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glassmorphism {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

.hidden {
    display: none !important;
}

/* Drag & Drop Zone */
.drop-area {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    background: rgba(22, 27, 34, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
}

.drop-area:hover,
.drop-area.highlight {
    border-color: var(--accent-color);
    background: rgba(88, 166, 255, 0.05);
    box-shadow: var(--shadow-glow);
}

.file-input {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
}

.drop-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    pointer-events: none;
}

.upload-icon {
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
}

.drop-area:hover .upload-icon {
    color: var(--accent-color);
    transform: translateY(-5px);
}

.drop-text strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.drop-text span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Status Box */
.status-box {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    animation: fadeIn 0.4s ease;
}

.status-box.sucess {
    background: rgba(35, 134, 54, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(35, 134, 54, 0.4);
}

.status-box.error {
    background: rgba(248, 81, 73, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(248, 81, 73, 0.4);
}

/* Settings Form */
.settings-section {
    animation: fadeInUp 0.5s ease;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.badge {
    background: var(--accent-color);
    color: #000;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
}

.col-title {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.input-group label span {
    color: var(--accent-color);
    font-family: monospace;
    background: rgba(88, 166, 255, 0.1);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

.input-group label span.opt {
    color: var(--text-secondary);
    background: none;
    font-family: inherit;
}

#thickness-status-icon,
#scale-status-icon {
    display: inline-block;
    margin-left: 0.25rem;
    font-size: 1.1rem;
    font-weight: bold;
}

#thickness-status-icon.success,
#scale-status-icon.success {
    color: var(--success-color);
}

#thickness-status-icon.error,
#scale-status-icon.error {
    color: var(--danger-color);
}

input[type="text"],
input[type="number"] {
    width: 100%;
    background: #0d1117;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.input-group.edit-scale {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
}

.input-group.readonly input {
    background: rgba(48, 54, 61, 0.3);
    color: var(--text-secondary);
    cursor: default;
}

#info-diameter.highlight-diameter {
    color: #4ade80 !important;
    /* Brighter green */
    font-weight: 700 !important;
}

#info-diameter.warning-diameter {
    color: #ffb020 !important;
    /* Orange/Warning */
    font-weight: 700 !important;
}

.input-group.readonly input:focus {
    border-color: var(--border-color);
    box-shadow: none;
}

.coord-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.coord-field {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.coord-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Actions */
.action-bar {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.primary-btn {
    background: var(--accent-color);
    color: #fff;
    box-shadow: 0 0 15px rgba(88, 166, 255, 0.2);
}

.primary-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.3);
}

.primary-btn:disabled {
    background: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.ghost-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.ghost-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
}

.secondary-btn {
    background: transparent;
    color: #fff;
    border: 1px solid var(--accent-color);
}

.secondary-btn:hover {
    background: rgba(88, 166, 255, 0.1);
    transform: translateY(-1px);
}

.download-btn {
    background: var(--success-color);
    color: #fff;
    width: 100%;
    margin-bottom: 1rem;
}

.download-btn:hover {
    background: var(--success-hover);
}

/* Result Card */
.result-section {
    animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-card {
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
}

.success-icon {
    width: 64px;
    height: 64px;
    background: rgba(35, 134, 54, 0.1);
    color: var(--success-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.success-icon svg {
    width: 32px;
    height: 32px;
}

.success-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.success-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.log-box {
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: left;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    max-height: 150px;
    overflow-y: auto;
    margin-bottom: 2rem;
    white-space: pre-wrap;
}

.iso-preview-container {
    text-align: left;
    margin-bottom: 1.5rem;
}

.preview-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.coord-inputs {
    display: flex;
    gap: 1rem;
}

.coord-field {
    flex: 1;
    display: flex;
    align-items: center;
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.coord-field:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

.readonly-coords .coord-field {
    opacity: 0.6;
    pointer-events: none;
    border-color: transparent;
    background: rgba(255, 255, 255, 0.05);
}

.iso-preview {
    width: 100%;
    height: 300px;
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    resize: none;
    outline: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5);
    white-space: pre;
    overflow-x: auto;
}

.iso-preview:focus {
    border-color: var(--accent-color);
}

/* Loading animations */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}