:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --dark: #1e293b;
    --darker: #0f172a;
    --light: #f8fafc;
    --gray: #94a3b8;
    --gray-light: #e2e8f0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.08);
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --border-radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    color: var(--light);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    line-height: 1.6;
}

.app-container {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    position: relative;
}

header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.logo i {
    font-size: 32px;
    color: white;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--gray);
    font-size: 1rem;
    font-weight: 400;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--card-border);
}

.algorithm-selector {
    margin-bottom: 20px;
    position: relative;
}

.algorithm-selector label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--light);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.algorithm-selector label i {
    color: var(--primary);
}

.algorithm-select {
    width: 100%;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    border: 1.5px solid rgba(255, 255, 255, 0.1);
    background: rgba(15, 23, 42, 0.6);
    color: var(--light);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23818cf8'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
}

.algorithm-select:hover {
    border-color: var(--primary);
}

.algorithm-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.file-input-area {
    position: relative;
    margin-bottom: 20px;
}

.dropzone {
    width: 100%;
    min-height: 180px;
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
}

.dropzone i {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--primary);
    transition: var(--transition);
}

.dropzone:hover i {
    transform: scale(1.1);
}

.dropzone .main-text {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.dropzone .hint {
    color: var(--gray);
    font-size: 0.9rem;
}

.file-input {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.mobile-button {
    display: none;
    width: 100%;
    padding: 14px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    margin-bottom: 20px;
    justify-content: center;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.mobile-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.mobile-button:active {
    transform: translateY(0);
}

.file-progress {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 12px;
    display: none;
}

.file-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin: 24px auto;
    display: none;
}

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

.results {
    background: rgba(15, 23, 42, 0.6);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
    transition: var(--transition);
    opacity: 0;
    height: 0;
    overflow: hidden;
    transform: translateY(10px);
}

.results.visible {
    opacity: 1;
    height: auto;
    transform: translateY(0);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.file-icon {
    width: 42px;
    height: 42px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-icon i {
    color: white;
    font-size: 18px;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.filename {
    font-weight: 600;
    color: var(--light);
    word-break: break-all;
    margin-bottom: 4px;
    font-size: 1rem;
}

.file-size {
    font-size: 0.8rem;
    color: var(--gray);
}

.hash-label {
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: block;
    font-weight: 500;
}

.hash-result {
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    margin-bottom: 20px;
    position: relative;
    font-size: 0.9rem;
    line-height: 1.5;
    border: 1px solid rgba(255, 255, 255, 0.05);
    max-height: 150px;
    overflow-y: auto;
}

.action-buttons {
    display: flex;
    gap: 12px;
}

.copy-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    font-size: 0.95rem;
}

.copy-btn:hover {
    background: var(--primary-dark);
}

.new-file-btn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    font-size: 0.95rem;
}

.new-file-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.copy-notification {
    position: fixed;
    min-width: fit-content;
    bottom: 47px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--secondary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    z-index: 1001;
}

.copy-notification.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

button,
select,
input {
    outline: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}

.hashing {
    animation: pulse 1.5s ease-in-out infinite;
}

@media (max-width: 480px) {
    .app-container {
        width: 100vw;
        min-height: 100vh;
        padding: 24px 16px 32px;
        border-radius: 0;
        box-shadow: none;
        border: none;
        background: transparent;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }

    header {
        margin-bottom: 24px;
        margin-top: 16px;
    }

    .logo {
        margin-top: 8px;
        margin-bottom: 12px;
    }

    .dropzone {
        display: none;
    }

    .mobile-button {
        display: flex;
        margin-bottom: 20px;
    }

    .action-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .file-info {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }

    .file-details {
        width: 100%;
    }

    .results {
        margin-top: 24px;
        padding: 16px;
    }

    .hash-result {
        padding: 12px;
        margin-bottom: 16px;
    }

    .file-progress {
        margin-top: 16px;
    }

    .copy-notification {
        bottom: 32px;
    }
}