/* Variables for Siemens color theme */
:root {
    --siemens-corporate-blue: #003366; /* Deep blue for header, CTAs */
    --siemens-light-gray: #f4f4f4;    /* Background gray */
    --siemens-white: #ffffff;         /* Card backgrounds, text */
    --siemens-dark-gray: #0f0f0f;     /* Main text color */
    --siemens-accent-teal: #009999; /* Accent color (teal) */
 
    --shadow-light: 0 4px 10px rgba(0,0,0,0.08);
    --shadow-medium: 0 6px 15px rgba(0,0,0,0.12);
 
    --border-radius-card: 12px;
    --border-radius-elements: 8px;
 
    --font-family-primary: 'Open Sans', 'Roboto', Arial, sans-serif;
}
 
/* General Body Styles */
body {
    font-family: var(--font-family-primary);
    margin: 0;
    padding: 0;
    background-color: var(--siemens-light-gray);
    color: var(--siemens-dark-gray);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
 
/* Header */
header {
    background-color: var(--siemens-corporate-blue);
    color: var(--siemens-white);
    padding: 1.8rem 1rem;
    text-align: center;
    box-shadow: var(--shadow-medium);
}
 
header h1 {
    margin: 0;
    font-size: 2.8rem;
    font-weight: 700;
}
 
header .tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-top: 0.5rem;
}
 
/* Main Container */
.container {
    max-width: 1200px; /* Wider for editor/preview */
    margin: 2.5rem auto;
    padding: 1.2rem;
    flex-grow: 1;
}
 
/* Card Styles */
.card {
    background-color: var(--siemens-white);
    padding: 2.5rem;
    margin-bottom: 2rem;
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow-light);
    transition: transform 0.3s ease-in-out;
}
 
.card:hover {
    transform: translateY(-3px);
}
 
.section-title {
    color: var(--siemens-corporate-blue);
    margin-top: 0;
    margin-bottom: 2rem;
    font-size: 2.2rem;
    font-weight: 600;
    border-bottom: 3px solid var(--siemens-accent-teal);
    padding-bottom: 0.8rem;
}
 
/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--siemens-light-gray);
    margin-bottom: 1.5rem;
}
 
.tab-btn {
    background-color: var(--siemens-white);
    border: 1px solid var(--siemens-medium-gray);
    border-bottom: none;
    border-radius: var(--border-radius-elements) var(--border-radius-elements) 0 0;
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--siemens-dark-gray);
    transition: all 0.2s ease;
    margin-right: 0.5rem;
}
 
.tab-btn.active {
    background-color: var(--siemens-corporate-blue);
    color: var(--siemens-white);
    border-color: var(--siemens-corporate-blue);
    transform: translateY(2px);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
 
.tab-btn:hover:not(.active) {
    background-color: var(--siemens-light-gray);
    color: var(--siemens-corporate-blue);
}
 
.tab-panel {
    padding: 1.5rem 0;
    border-top: none;
}
 
/* Instructions */
.instruction {
    background-color: #ffeccf; /* Light orange background */
    border-left: 5px solid #ffbb55; /* Orange border */
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius-elements);
    color: #664400;
    font-weight: 500;
}
.instruction-note {
    font-size: 0.9em;
    color: #888;
    margin-top: -1em;
    margin-bottom: 1.5em;
}
 
/* Input Group */
.input-group {
    margin-bottom: 1.5rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: var(--siemens-dark-gray);
    font-size: 1rem;
}
.input-group input[type="url"],
.input-group input[type="text"],
.input-group input[type="number"],
.input-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--siemens-medium-gray);
    border-radius: var(--border-radius-elements);
    font-size: 1rem;
    box-sizing: border-box; /* Include padding in width */
    background-color: var(--siemens-white);
    color: var(--siemens-dark-gray);
}
.input-group input[type="range"] {
    width: 100%;
    height: 10px;
    background: var(--siemens-medium-gray);
    outline: none;
    opacity: 0.9;
    transition: opacity .2s;
    -webkit-appearance: none;
    appearance: none;
    border-radius: 5px;
}
.input-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--siemens-accent-teal);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.input-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--siemens-accent-teal);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.input-group span {
    display: block;
    text-align: right;
    font-weight: bold;
    color: var(--siemens-corporate-blue);
    margin-top: 0.5rem;
}
 
/* HTML Editor and Preview */
.html-editor-wrapper {
    margin-bottom: 1.5rem;
    border: 1px solid var(--siemens-medium-gray);
    border-radius: var(--border-radius-elements);
    overflow: hidden; /* For CodeMirror */
}
 
.CodeMirror {
    height: 300px; /* Fixed height for editor */
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    border-radius: var(--border-radius-elements); /* Match wrapper */
    background-color: #272822; /* Monokai background */
}
.CodeMirror-vscrollbar {
    overflow-x: hidden !important; /* Hide horizontal scrollbar if it appears */
}
 
.live-preview-container {
    border: 1px solid var(--siemens-medium-gray);
    border-radius: var(--border-radius-elements);
    height: 400px; /* Fixed height for preview */
    overflow: auto;
    background-color: var(--siemens-white);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
 
#live-preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block; /* Remove extra space */
    background-color: var(--siemens-white); /* Ensure background is white inside iframe */
}
 
/* Conversion Options Grid */
.conversion-options h3 {
    color: var(--siemens-corporate-blue);
    margin-top: 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--siemens-medium-gray);
    padding-bottom: 0.5rem;
}
 
.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.input-group.full-width {
    grid-column: 1 / -1; /* Span all columns in the grid */
}
 
 
/* Buttons */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius-elements);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
 
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
 
.btn-primary {
    background-color: var(--siemens-accent-teal);
    color: var(--siemens-white);
    box-shadow: 0 4px 8px rgba(0, 153, 153, 0.3);
}
 
.btn-primary:not(:disabled):hover {
    background-color: #007a7a;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 153, 153, 0.4);
}
 
.btn-cta {
    background-color: var(--siemens-corporate-blue);
    color: var(--siemens-white);
    box-shadow: 0 4px 8px rgba(0, 51, 102, 0.3);
}
 
.btn-cta:not(:disabled):hover {
    background-color: #002244;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 51, 102, 0.4);
}
 
.btn-secondary {
    background-color: var(--siemens-medium-gray);
    color: var(--siemens-dark-gray);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
 
.btn-secondary:not(:disabled):hover {
    background-color: #b3b3b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}
 
.button-group {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}
 
/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px); /* For Safari */
}
 
.spinner {
    border: 8px solid var(--siemens-light-gray);
    border-top: 8px solid var(--siemens-accent-teal);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin-bottom: 2rem;
}
 
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
 
.loading-overlay p {
    font-size: 1.5rem;
    color: var(--siemens-corporate-blue);
    font-weight: 600;
    margin-bottom: 1.5rem;
}
 
.progress-bar-container {
    width: 80%;
    max-width: 400px;
    background-color: var(--siemens-medium-gray);
    border-radius: 5px;
    height: 15px;
    overflow: hidden;
    margin-bottom: 1rem;
}
 
.progress-bar {
    height: 100%;
    background-color: var(--siemens-accent-teal);
    width: 0%;
    border-radius: 5px;
    transition: width 0.3s ease-out;
}
 
.progress-text {
    font-size: 1.1rem;
    color: var(--siemens-dark-gray);
}
 
/* Notifications */
#notification-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column-reverse; /* New notifications appear on top */
    gap: 12px;
}
 
.notification {
    padding: 1.2rem 1.8rem;
    border-radius: var(--border-radius-elements);
    color: var(--siemens-white);
    font-weight: bold;
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInSlideUp 0.5s forwards, fadeOut 0.5s forwards 4.5s; /* Fade in, then fade out after 4.5s (total 5s display) */
}
 
.notification.success {
    background-color: #28a745; /* Green */
}
 
.notification.error {
    background-color: #dc3545; /* Red */
}
 
@keyframes fadeInSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
 
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}
 
/* Utility Class */
.hidden {
    display: none !important;
}
 
/* Footer */
footer {
    text-align: center;
    padding: 1.8rem 1rem;
    background-color: var(--siemens-corporate-blue);
    color: var(--siemens-white);
    margin-top: 3rem;
    box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
}
 
/* Mobile Responsiveness */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    header .tagline {
        font-size: 1rem;
    }
 
    .container {
        margin: 1.5rem auto;
        padding: 0.8rem;
    }
 
    .card {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
 
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
 
    .tabs {
        flex-direction: column;
        gap: 0.5rem;
    }
 
    .tab-btn {
        width: 100%;
        margin-right: 0;
        border-radius: var(--border-radius-elements);
        border-bottom: 1px solid var(--siemens-medium-gray);
    }
    .tab-btn.active {
        transform: none; /* Remove translateY */
    }
 
    .tab-panel {
        padding: 1rem 0;
    }
 
    .instruction {
        padding: 0.8rem 1rem;
    }
 
    .input-group label {
        font-size: 0.95rem;
    }
    .input-group input[type="text"],
    .input-group input[type="url"],
    .input-group input[type="number"],
    .input-group select {
        padding: 0.6rem;
    }
 
    .html-editor-wrapper {
        height: auto; /* Allow height to adjust */
    }
    .CodeMirror {
        height: 200px;
    }
 
    .live-preview-container {
        height: 300px;
    }
 
    .option-grid {
        grid-template-columns: 1fr; /* Stack options vertically */
        gap: 1rem;
    }
 
    .btn {
        padding: 0.8rem 1.2rem;
        font-size: 1rem;
        width: 100%;
    }
 
    .button-group {
        flex-direction: column;
        gap: 1rem;
    }
 
    .loading-overlay p {
        font-size: 1.2rem;
    }
 
    .spinner {
        width: 50px;
        height: 50px;
        border-width: 6px;
    }
 
    .progress-bar-container {
        width: 90%;
    }
 
    #notification-container {
        bottom: 10px;
        right: 10px;
        left: 10px;
    }
 
    .notification {
        padding: 1rem 1.2rem;
        font-size: 0.9rem;
    }
}