.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.tool-header {
    text-align: center;
    margin-bottom: 3rem;
}

.tool-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.tool-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.input-section {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.input-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
}

.date-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.date-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.label-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

input[type="date"],
input[type="time"],
.tz-select {
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

.button-row {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 1rem;
}

.checkbox-label {
    margin-left: auto;
    display: flex;
    gap: .5rem;
    align-items: center;
    font-weight: 600;
    color: var(--text-primary);
}

.convert-btn {
    padding: 0.8rem 1.2rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.action-btn {
    padding: 0.5rem 0.9rem;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.output-section {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.output-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

#result-display {
    background: rgba(255, 107, 53, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: var(--text-primary);
    min-height: 100px;
    white-space: pre-wrap;
}

.output-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    align-items: center;
}

.back-button {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
}

.back-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

@media (max-width:720px) {
    .date-inputs {
        grid-template-columns: 1fr;
    }

    .button-row {
        flex-direction: column;
        align-items: flex-start;
    }
}