/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #ffffff;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Black & Blue Theme */
:root {
    --black: #1a1a1a;
    --black-light: #2d2d2d;
    --black-lighter: #3d3d3d;
    --blue: rgb(0, 213, 255);
    --blue-dark: rgb(0, 183, 255);
    --blue-light: rgba(0, 213, 255, 0.1);
    --white: #ffffff;
    --gray: #666666;
    --green: #4CAF50;
    --red: #f44336;
}

/* Header Styles */
.header {
    background: var(--black-light);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    border-left: 6px solid var(--blue);
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.logo h1 {
    color: var(--blue);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.logo i {
    font-size: 3rem;
    color: var(--blue);
    margin-bottom: 1rem;
    display: block;
}

.tagline {
    color: var(--gray);
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Tool Card Styles */
.tool-card {
    background: var(--black-light);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid var(--black-lighter);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 213, 255, 0.2);
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--blue);
}

.tool-header h3 {
    color: var(--blue);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tool-actions {
    display: flex;
    gap: 0.5rem;
}

/* Button Styles */
.primary-btn {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: var(--black);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 213, 255, 0.4);
}

.download-btn {
    background: var(--black-lighter);
    color: var(--white);
    border: 2px solid var(--blue);
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-btn:hover {
    background: var(--blue);
    color: var(--black);
}

.copy-btn {
    background: var(--black-lighter);
    color: var(--white);
    border: 2px solid var(--green);
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.copy-btn:hover {
    background: var(--green);
    color: var(--white);
}

.reset-btn {
    background: transparent;
    color: var(--gray);
    border: 2px solid var(--gray);
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reset-btn:hover {
    background: var(--gray);
    color: var(--white);
}

/* Form Styles */
.tool-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--blue);
    margin-bottom: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group textarea {
    background: var(--black);
    border: 2px solid var(--black-lighter);
    color: var(--white);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
    resize: vertical;
    min-height: 120px;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(0, 213, 255, 0.1);
}

/* Character Count */
.char-count {
    color: var(--gray);
    font-size: 0.8rem;
    margin-top: 0.5rem;
    text-align: right;
}

/* Conversion Options */
.conversion-options h4 {
    color: var(--blue);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.option-card {
    cursor: pointer;
}

.option-card input {
    display: none;
}

.option-content {
    background: var(--black);
    padding: 1.5rem;
    border-radius: 8px;
    border: 2px solid var(--black-lighter);
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-card input:checked + .option-content {
    border-color: var(--blue);
    background: var(--blue-light);
    transform: translateY(-2px);
}

.option-content:hover {
    border-color: var(--blue);
    transform: translateY(-2px);
}

.option-content i {
    font-size: 1.5rem;
    color: var(--blue);
}

.option-content span {
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
}

.option-content small {
    color: var(--gray);
    font-size: 0.7rem;
}

/* Output Info */
.output-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    color: var(--gray);
    font-size: 0.8rem;
}

.copy-status {
    color: var(--green);
    font-weight: 500;
}

/* Examples Grid */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.example-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--black);
    border-radius: 8px;
    border: 1px solid var(--black-lighter);
}

.example-type {
    color: var(--blue);
    font-weight: 600;
    font-size: 0.9rem;
}

.example-text {
    color: var(--white);
    font-size: 0.8rem;
    word-break: break-all;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .header {
        padding: 1.5rem;
    }

    .logo h1 {
        font-size: 2rem;
    }

    .tool-card {
        padding: 1.5rem;
    }

    .tool-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .tool-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .examples-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-actions {
        flex-direction: column;
    }
    
    .primary-btn, .download-btn, .copy-btn, .reset-btn {
        width: 100%;
        justify-content: center;
    }
}