/* Case Converter Tool - Fully Responsive Styles */

/* CSS Variables for Day/Night Mode */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8fafc;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: #e2e8f0;
    --border-light: #edf2f7;
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --hover-bg: #f7fafc;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent-color: #667eea;
    --accent-light: rgba(102, 126, 234, 0.1);
}

/* Night mode variables */
.night-mode {
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-tertiary: #a0aec0;
    --border-color: #4a5568;
    --border-light: #4a5568;
    --card-bg: #2d3748;
    --input-bg: #1a202c;
    --hover-bg: #4a5568;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --accent-color: #90a4f0;
    --accent-light: rgba(144, 164, 240, 0.2);
}

/* Base Styles */
.caseconverter-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.caseconverter-wrapper {
    width: 100%;
    max-width: 1000px;
    background-color: var(--bg-secondary);
    border-radius: 30px;
    padding: 30px;
    box-shadow: 0 20px 60px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.caseconverter-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px var(--shadow-color);
    letter-spacing: -0.5px;
}

.caseconverter-heart {
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.caseconverter-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 400;
    line-height: 1.6;
}

.caseconverter-card {
    background: var(--card-bg);
    border-radius: 30px;
    padding: 40px;
    box-shadow: 0 10px 40px var(--shadow-color);
    border: 1px solid var(--border-color);
}

/* Input Area */
.caseconverter-input-area {
    margin-bottom: 30px;
}

.caseconverter-textarea {
    width: 100%;
    height: 200px;
    padding: 20px;
    border: 3px solid var(--border-color);
    border-radius: 20px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    resize: vertical;
    transition: all 0.3s ease;
    box-sizing: border-box;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--input-bg);
}

.caseconverter-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-light);
}

.caseconverter-char-count {
    text-align: right;
    margin-top: 10px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Case Conversion Options Grid */
.caseconverter-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.caseconverter-option-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 15px 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-family: 'Poppins', sans-serif;
}

.caseconverter-option-btn:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px var(--shadow-color);
    background: var(--card-bg);
}

.caseconverter-option-btn:active {
    transform: translateY(-2px);
}

.option-icon {
    font-size: 1.8rem;
    line-height: 1;
}

.option-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.option-preview {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    background: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 20px;
    width: 100%;
    text-align: center;
}

/* Action Buttons */
.caseconverter-action-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.caseconverter-action-btn {
    flex: 1;
    padding: 15px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.caseconverter-action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

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

.action-icon {
    font-size: 1.2rem;
}

/* Result Area */
.caseconverter-result {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: 20px;
    border: 2px solid var(--accent-color);
    animation: slideUp 0.3s ease;
}

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

.caseconverter-result-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

.caseconverter-result-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 20px;
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Fun Fact */
.caseconverter-funfact {
    text-align: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 50px;
    margin-top: 30px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    backdrop-filter: blur(5px);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
    box-shadow: 0 4px 15px var(--shadow-color);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Message Notifications */
.caseconverter-message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 500;
    animation: slideIn 0.3s ease;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.caseconverter-message-success {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
}

.caseconverter-message-error {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    color: white;
}

.caseconverter-message-info {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* SEO Section */
.caseconverter-seo {
    margin-top: 50px;
    text-align: left;
    max-width: 800px;
    width: 100%;
}

.caseconverter-seo h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 2px 2px 4px var(--shadow-color);
}

.caseconverter-seo h3 {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin: 30px 0 15px;
    font-weight: 600;
}

.caseconverter-seo p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.caseconverter-howto-list {
    list-style-type: none;
    padding: 0;
}

.caseconverter-howto-list li {
    color: var(--text-secondary);
    padding: 12px 0 12px 35px;
    position: relative;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border-light);
}

.caseconverter-howto-list li:last-child {
    border-bottom: none;
}

.caseconverter-howto-list li:before {
    content: "🔤";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 1.2rem;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* ====================== RESPONSIVE DESIGN ====================== */

/* Tablet Styles (768px to 1024px) */
@media screen and (max-width: 1024px) {
    .caseconverter-container {
        padding: 15px;
    }

    .caseconverter-wrapper {
        padding: 25px;
    }

    .caseconverter-title {
        font-size: 3rem;
    }

    .caseconverter-card {
        padding: 30px;
    }

    .caseconverter-options {
        gap: 12px;
    }

    .caseconverter-option-btn {
        padding: 12px 8px;
    }
}

/* Mobile Landscape & Tablet Portrait (481px to 768px) */
@media screen and (max-width: 768px) {
    .caseconverter-container {
        padding: 10px;
    }

    .caseconverter-wrapper {
        padding: 20px;
    }

    .caseconverter-title {
        font-size: 2.5rem;
    }

    .caseconverter-subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .caseconverter-card {
        padding: 25px;
    }

    .caseconverter-textarea {
        height: 150px;
        padding: 15px;
        font-size: 0.95rem;
    }

    /* 2x2 grid for options on tablet */
    .caseconverter-options {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .caseconverter-option-btn {
        padding: 12px 10px;
    }

    .option-icon {
        font-size: 1.5rem;
    }

    .option-label {
        font-size: 0.85rem;
    }

    .option-preview {
        font-size: 0.75rem;
    }

    .caseconverter-action-buttons {
        gap: 12px;
    }

    .caseconverter-action-btn {
        padding: 12px 15px;
        font-size: 0.9rem;
    }

    .action-icon {
        font-size: 1rem;
    }

    .caseconverter-result {
        padding: 15px;
    }

    .caseconverter-result-title {
        font-size: 1.1rem;
    }

    .caseconverter-result-box {
        padding: 15px;
        max-height: 250px;
    }

    .caseconverter-funfact {
        font-size: 0.95rem;
        padding: 15px;
    }

    .caseconverter-seo h2 {
        font-size: 1.6rem;
    }

    .caseconverter-seo h3 {
        font-size: 1.3rem;
    }

    .caseconverter-seo p,
    .caseconverter-howto-list li {
        font-size: 0.95rem;
    }
}

/* Mobile Portrait (up to 480px) */
@media screen and (max-width: 480px) {
    .caseconverter-container {
        padding: 8px;
    }

    .caseconverter-wrapper {
        padding: 15px;
        border-radius: 20px;
    }

    .caseconverter-title {
        font-size: 1.8rem;
    }

    .caseconverter-subtitle {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }

    .caseconverter-card {
        padding: 20px;
        border-radius: 20px;
    }

    .caseconverter-textarea {
        height: 120px;
        padding: 12px;
        font-size: 0.9rem;
        border-radius: 15px;
    }

    .caseconverter-char-count {
        font-size: 0.8rem;
    }

    /* Single column for options on mobile */
    .caseconverter-options {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .caseconverter-option-btn {
        flex-direction: row;
        justify-content: space-between;
        padding: 12px 15px;
        gap: 10px;
    }

    .option-icon {
        font-size: 1.3rem;
    }

    .option-label {
        font-size: 0.9rem;
        flex: 1;
        text-align: left;
    }

    .option-preview {
        width: auto;
        font-size: 0.7rem;
        padding: 3px 8px;
    }

    .caseconverter-action-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .caseconverter-action-btn {
        width: 100%;
        padding: 12px;
        font-size: 0.85rem;
    }

    .caseconverter-result {
        padding: 12px;
        border-radius: 15px;
    }

    .caseconverter-result-title {
        font-size: 1rem;
        margin-bottom: 10px;
    }

    .caseconverter-result-box {
        padding: 12px;
        max-height: 200px;
        font-size: 0.85rem;
        border-radius: 12px;
    }

    .caseconverter-funfact {
        font-size: 0.85rem;
        padding: 12px;
        border-radius: 30px;
    }

    .caseconverter-seo {
        margin-top: 30px;
    }

    .caseconverter-seo h2 {
        font-size: 1.3rem;
        margin-bottom: 15px;
    }

    .caseconverter-seo h3 {
        font-size: 1.1rem;
        margin: 20px 0 12px;
    }

    .caseconverter-seo p,
    .caseconverter-howto-list li {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .caseconverter-howto-list li {
        padding: 10px 0 10px 30px;
    }

    .caseconverter-howto-list li:before {
        font-size: 1rem;
    }

    /* Message notifications on mobile */
    .caseconverter-message {
        top: 10px;
        right: 10px;
        left: 10px;
        padding: 12px 20px;
        text-align: center;
        font-size: 0.85rem;
    }
}

/* Extra Small Devices (up to 360px) */
@media screen and (max-width: 360px) {
    .caseconverter-title {
        font-size: 1.5rem;
    }

    .caseconverter-card {
        padding: 15px;
    }

    .caseconverter-textarea {
        height: 100px;
        padding: 10px;
        font-size: 0.85rem;
    }

    .caseconverter-option-btn {
        padding: 10px 12px;
    }

    .option-label {
        font-size: 0.8rem;
    }

    .caseconverter-action-btn {
        padding: 10px;
        font-size: 0.8rem;
    }

    .caseconverter-result-box {
        max-height: 180px;
    }

    .caseconverter-funfact {
        font-size: 0.75rem;
        padding: 10px;
    }

    .caseconverter-seo h2 {
        font-size: 1.2rem;
    }

    .caseconverter-seo h3 {
        font-size: 1rem;
    }
}

/* Touch-friendly improvements for mobile devices */
@media (hover: none) and (pointer: coarse) {
    .caseconverter-option-btn,
    .caseconverter-action-btn {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .caseconverter-option-btn:active,
    .caseconverter-action-btn:active {
        transform: scale(0.98);
    }
}

/* Smooth transitions for all interactive elements */
* {
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

/* Print styles for better readability */
@media print {
    .caseconverter-option-btn,
    .caseconverter-action-btn,
    .caseconverter-message {
        display: none;
    }

    .caseconverter-container {
        padding: 0;
        margin: 0;
    }

    .caseconverter-wrapper {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}