:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --dark-color: #202124;
    --light-color: #f8f9fa;
    --border-color: #dadce0;
    --bg-color: #f5f7fa;
    --text-color: #202124;
    --card-bg: rgba(255, 255, 255, 0.95);
}

.hacker-theme {
    --primary-color: #00ff41;
    --secondary-color: #008f11;
    --accent-color: #ff0033;
    --dark-color: #003b00;
    --light-color: #0a0a0a;
    --border-color: #008f11;
    --bg-color: #0a0a0a;
    --text-color: #00ff41;
    --card-bg: rgba(10, 10, 10, 0.9);
}

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

body {
    font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.5s ease;
}

.hacker-theme body {
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 5px var(--primary-color);
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.hacker-theme .container {
    border: 1px solid var(--border-color);
    box-shadow: 0 0 10px var(--primary-color);
    overflow: hidden;
}

.container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
            rgba(0, 255, 65, 0.1) 1px,
            transparent 1px
    );
    background-size: 100% 5px;
    pointer-events: none;
    animation: scanline 8s linear infinite;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.hacker-theme .container::before {
    opacity: 1;
}

@keyframes scanline {
    0% { background-position: 0 0; }
    100% { background-position: 0 100%; }
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    position: relative;
}

.hacker-theme header {
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 500;
    transition: all 0.5s ease;
}

.hacker-theme h1 {
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
    letter-spacing: 2px;
}

.subtitle {
    color: var(--secondary-color);
    font-size: 1.1rem;
    transition: all 0.5s ease;
}

.hacker-theme .subtitle {
    letter-spacing: 1px;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 0 10px var(--primary-color);
}

.hacker-theme .theme-toggle {
    background: var(--dark-color);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.tool-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.5s ease;
}

.hacker-theme .tool-card {
    border-radius: 0;
    box-shadow: none;
    border: 1px solid var(--border-color);
    backdrop-filter: none;
}

.tab-container {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    font-weight: 500;
    color: var(--secondary-color);
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.hacker-theme .tab {
    letter-spacing: 1px;
}

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab:hover {
    color: var(--primary-color);
}

.hacker-theme .tab:hover {
    text-shadow: 0 0 5px var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.5s ease;
}

.hacker-theme label {
    letter-spacing: 1px;
}

textarea {
    width: 100%;
    min-height: 150px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Roboto Mono', monospace;
    font-size: 14px;
    resize: vertical;
    transition: all 0.3s;
    background-color: rgba(255, 255, 255, 0.8);
    color: var(--text-color);
    outline: none;
}

.hacker-theme textarea {
    border-radius: 0;
    background-color: rgba(0, 0, 0, 0.5);
    font-family: 'Courier New', monospace;
}

textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
    background-color: white;
}

.hacker-theme textarea:focus {
    box-shadow: 0 0 10px var(--primary-color);
    background-color: rgba(0, 0, 0, 0.7);
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    background-color: var(--primary-color);
    color: white;
    position: relative;
    overflow: hidden;
}

.hacker-theme .btn {
    border-radius: 0;
    border: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--primary-color);
    letter-spacing: 1px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
            90deg,
            transparent,
            rgba(0, 255, 65, 0.2),
            transparent
    );
    transition: all 0.5s;
    opacity: 0;
}

.hacker-theme .btn::before {
    opacity: 1;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #3367d6;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.hacker-theme .btn-primary:hover {
    background-color: rgba(0, 255, 65, 0.1);
    box-shadow: 0 0 10px var(--primary-color);
}

.btn-secondary {
    background-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #2d9249;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.hacker-theme .btn-secondary {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.hacker-theme .btn-secondary:hover {
    background-color: rgba(0, 143, 17, 0.1);
    box-shadow: 0 0 10px var(--secondary-color);
    color: var(--primary-color);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--dark-color);
}

.btn-outline:hover {
    background-color: #f1f1f1;
    transform: translateY(-2px);
}

.hacker-theme .btn-outline {
    background-color: transparent;
    color: var(--text-color);
}

.hacker-theme .btn-outline:hover {
    background-color: rgba(0, 255, 65, 0.1);
    color: var(--primary-color);
}

.result-container {
    margin-top: 20px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.result-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    color: var(--secondary-color);
    font-size: 14px;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.copy-btn:hover {
    text-decoration: underline;
}

.hacker-theme .copy-btn:hover {
    text-shadow: 0 0 5px var(--primary-color);
}

.file-input {
    display: none;
}

.file-info {
    margin-top: 10px;
    font-size: 14px;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-info svg {
    fill: currentColor;
}

.error-message {
    color: var(--accent-color);
    margin-top: 10px;
    font-size: 14px;
    padding: 10px;
    background-color: rgba(234, 67, 53, 0.1);
    border-radius: 4px;
    display: none;
}

.hacker-theme .error-message {
    border-radius: 0;
    border: 1px solid var(--accent-color);
}

.success-message {
    color: var(--secondary-color);
    margin-top: 10px;
    font-size: 14px;
    padding: 10px;
    background-color: rgba(52, 168, 83, 0.1);
    border-radius: 4px;
    display: none;
}

.hacker-theme .success-message {
    border-radius: 0;
    border: 1px solid var(--secondary-color);
}

footer {
    margin-top: auto;
    text-align: center;
    padding: 20px 0;
    color: var(--secondary-color);
    font-size: 14px;
    width: 100%;
}

.hacker-theme footer {
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .tool-card {
        padding: 20px;
    }

    .btn {
        padding: 10px 15px;
        font-size: 14px;
    }
}